CN113463836A - Combined I-shaped beam and manufacturing method thereof - Google Patents

Abstract

The invention discloses a combined I-beam and a manufacturing method thereof, wherein the combined I-beam comprises a long wood unit, a first bamboo plywood, a plurality of first pins, a winged reinforcing steel bar frame, a second bamboo plywood, a third bamboo plywood and a plurality of hoops, wherein a left long wood unit and a right long wood unit in the long wood unit are formed by alternately laminating and splicing a plurality of small short woods; the first bamboo plywood is positioned between the left long wood unit and the right long wood unit and is bonded and fixed by first glue; the first pins penetrate and are embedded into the combined body along the left-right direction; the connection interfaces between the winged steel bar frame and the long wood unit and between the first bamboo plywood are fixed by third glue; the second bamboo plywood and the third bamboo plywood are respectively and correspondingly fixed on the upper surface and the lower surface of the I-shaped beam base piece; the plurality of hoop sleeves are sleeved on the outer peripheral surface of the I-shaped beam structure. The combined I-beam can effectively recycle small-section wood and bamboo resources, improves the using amount of reinforcing steel bars, and has the advantages of simple and reliable structure, wide application range and high environmental protection.

Description

Combined I-shaped beam and manufacturing method thereof

Technical Field

The invention relates to the technical field of building structure engineering, in particular to a combined I-beam and a manufacturing method thereof.

Background

In villages and small towns building structures, a brick-wood structure and a wood frame structure are widely applied, and a wood beam is a horizontal component of the brick-wood structure and is also a horizontal component of the wood frame structure. In the brick-wood structure, the wood beam can be directly lapped on a brick wall to bear the load of a floor or a roof and transmit the load to the brick wall; in the wooden frame structure, the wooden beam and the wooden column form a wooden frame through a connecting node, and the load of the floor or the roof borne by the wooden beam is transmitted to the wooden column through the node.

Conventional timber beams are typically made from whole logs, including round, rectangular, T-shaped, etc. in cross-section. Due to excessive forest felling, the resources of the whole log with large cross section are very deficient at present. On the other hand, there are many stocks of waste small-section logs sawed manually in forests and residual small-section woods in wood processing plants, and because the small-section logs and the residual small-section woods are not only small in section and short in length, but also lack of corresponding recycling technology, the small-section logs and the residual small-section woods can only be treated as waste products, so that resources are wasted, and the environment is polluted. How to recycle waste small-section logs sawed off manually in forests and residual small-section woods in a wood processing plant is a key technical problem which is very concerned about and urgently needed to be solved in the engineering field.

After the small-section wood is processed into the rectangular-section wood, the long small-section rectangular wood is difficult to process, the actually processed small-section rectangular wood is different in length, how to reasonably and efficiently utilize the short wood with the different lengths is also very concerned in the engineering field.

The small-section short wood processed by different wood species has obvious strength and rigidity difference, and the small-section short wood of different wood species is reasonably adopted at different stress parts in the same light steel-wood-bamboo composite beam to achieve high-efficiency stress, so that the high-efficiency recycling of the small-section end wood is further realized from the mechanical perspective.

Bamboo has strong growth ability and belongs to an ecological building material. Bamboo resources in China are abundant, bamboo types and bamboo forest areas account for 1/4 of the world, bamboo yield accounts for 1/3 of the world, and the bamboo wood occupies the top of all countries in the world. The bamboo has excellent physical and mechanical properties, the tensile strength of the bamboo is about 2 times of that of wood, and the bamboo has good elasticity and flexibility. However, the mechanical properties of the bamboo are closely related and greatly different with the water content, the bamboo stalk position, the bamboo age, the standing conditions, the bamboo species and the like, so that the wide application of the bamboo in the building is limited. The bamboo wood-based panel produced by using bamboo as a main raw material greatly changes the form and structure of the bamboo due to the structural reasonability, and improves the stability of the physical and mechanical properties of the bamboo. The bamboo plywood processed by bamboo is already applied to a large scale as a building template, the corrosion resistance, the water resistance, the fire resistance, the compression resistance, the tensile resistance, the bending resistance and the like of the bamboo plywood are all obviously better than those of a wood template, the turnover frequency is obviously more than that of the wood template, and the working stability and the safety are good.

The surplus of the production capacity of the reinforcing steel bar materials in China is a concern in the industry at present how to reasonably adopt the reinforcing steel bar materials in the vast village and town building structures.

The adhesive mainly adopts latex for bonding wood and wood or bonding wood and bamboo plywood, the latex is also called white latex because the color of the latex is white, the latex is short for polyvinyl acetate adhesive and comprises single-component latex and double-component latex, and the modified latex has the advantages of firm bonding, good water resistance and good weather resistance. At present, structural adhesive is mainly used for bonding wood and steel or bonding bamboo plywood and steel, has high strength, peeling resistance and impact resistance, can bear larger load, is aging-resistant, fatigue-resistant and corrosion-resistant, has simple and convenient construction process, has stable performance within the expected service life of the structure, is suitable for bonding structural members, and can be used for bonding the same materials such as metal, wood and the like or bonding different materials. The price of the structural adhesive is higher than that of the latex.

Therefore, the wing-provided steel bar-laminated small short wood-bamboo plywood combined T-shaped beam which is economical, practical, low in manufacturing cost and simple and convenient to construct and is suitable for low-rise buildings, particularly low-rise rural houses in villages and towns is developed, and the wing-provided steel bar-laminated small short wood-bamboo plywood combined T-shaped beam has very important practical significance and social, economic and environmental values.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, one objective of the present invention is to provide a composite I-beam, which can effectively recycle small-section timber and bamboo resources, increase the usage amount of steel bars, and has the advantages of simple and reliable structure, wide application range and high environmental protection.

According to an embodiment of the first aspect of the present invention, the composite i-beam is a winged steel bar frame-staggered laminated small short wood-bamboo plywood composite i-beam, comprising:

the long wood unit comprises a left long wood unit and a right long wood unit, and the left long wood unit and the right long wood unit are both in a groove shape and are respectively formed by splicing and fixing a plurality of small short woods in a staggered and laminated manner;

the first bamboo plywood is positioned between the left long wood unit and the right long wood unit, and the left side surface of the first bamboo plywood and the right side surface of the left long wood unit as well as the right side surface of the first bamboo plywood and the left side surface of the right long wood unit are fixed by first glue, so that an I-shaped combination body is formed;

the outer peripheral surfaces of the first pins are coated with second glue and then penetrate and are embedded into the left long wood unit, the first bamboo plywood and the right long wood unit of the combination along the left-right direction;

The winged steel bar frame is approximately in an I shape in outline and comprises an upper steel bar frame, a lower steel bar frame, a front end steel bar frame and a rear end steel bar frame, wherein the upper steel bar frame is embedded in the upper surfaces of the left long wood unit, the first bamboo plywood and the right long wood unit of the combination, the front end and the rear end of the upper steel bar frame are bent downwards respectively to be embedded in the front end surfaces and the rear end surfaces of the left long wood unit and the right long wood unit of the combination correspondingly, the lower steel bar frame is embedded in the lower end surfaces of the left long wood unit, the first bamboo plywood and the right long wood unit of the combination, the front end and the rear end of the lower steel bar frame are bent upwards respectively to be correspondingly embedded in the front end surfaces and the rear end surfaces of the left long wood unit and the right long wood unit of the combination, and the front end frame is embedded in the left long wood unit of the combination, The front end surfaces of the first bamboo plywood and the right long wood unit are welded and fixed with the front ends of the upper steel bar frame and the lower steel bar frame, the rear steel bar frame is embedded in the rear end surfaces of the left long wood unit, the first bamboo plywood and the right long wood unit of the combined body and is welded and fixed with the rear end of the upper steel bar frame and the rear end of the lower steel bar frame, and the connection interfaces between the winged steel bar frame and the long wood unit and between the first bamboo plywood are fixed by adopting third glue bonding, so that the I-beam base member is formed;

The second bamboo plywood and the third bamboo plywood are respectively and correspondingly fixed on the upper surface and the lower surface of the I-shaped beam base part, so that an I-shaped beam structure is formed;

the hoop structures are arranged on the outer peripheral surface of the I-shaped beam structure in a sleeved mode, and the hoop structures are arranged on the outer peripheral surface of the I-shaped beam structure in a sleeved mode.

According to the combined I-beam of the embodiment of the first aspect of the invention, the manufacturing process comprises the following steps: according to the combined I-beam of the embodiment of the first aspect of the invention, the manufacturing process comprises the following steps: firstly, manufacturing a left long wood unit and a right long wood unit, wherein the left long wood unit and the right long wood unit are respectively formed by staggering, laminating and assembling a plurality of small short woods; then, manufacturing a combination body, and bonding and fixing the left side surface of the first bamboo plywood and the right side surface of the left long wood unit and the right side surface of the first bamboo plywood and the left side surface of the right long wood unit by first glue to form the combination body; then, installing a first pin, drilling a plurality of through holes penetrating through the left long wood unit, the first bamboo plywood and the right long wood unit at different positions of the I-beam base piece along the left-right direction by using an electric drill after the matching interface between the left side surface of the first bamboo plywood and the right side surface of the left long wood unit and the matching interface between the right side surface of the first bamboo plywood and the left side surface of the right long wood unit are bonded to reach certain strength, coating second glue on the peripheral surfaces of the plurality of first pins, and penetrating and embedding the second glue into the holes of the left long wood unit, the first bamboo plywood and the right long wood unit of the assembly along the left-right direction to form a double connection interface of mechanical connection and interface bonding complementation of the matching interfaces between the left long wood unit, the right long wood unit and the first bamboo plywood; then, groove-shaped mounting parts matched with the structural outline of the winged steel bar frame are processed on the upper surface, the lower surface, the front end surface and the rear end surface of the combined body; secondly, manufacturing a steel bar with wings, and determining the sizes of the upper longitudinal steel bar, the lower longitudinal steel bar, the front end vertical steel bar, the rear end vertical steel bar, the upper U-shaped steel bar, the lower U-shaped steel bar, the front end U-shaped steel bar and the rear end U-shaped steel bar according to the stress requirement of the combined I-shaped beam; secondly, manufacturing an I-shaped beam base piece, coating third glue on the front end steel bar frame, the rear end steel bar frame, the upper steel bar frame and the lower steel bar frame, then respectively and adaptively embedding the third glue into corresponding positions of the groove-type installation part, correspondingly welding and fixing the upper end and the lower end of the front end steel bar frame with the front end of the upper steel bar frame and the front end of the lower steel bar frame, and correspondingly welding and fixing the upper end and the lower end of the rear end steel bar frame with the rear end of the upper steel bar frame and the rear end of the lower steel bar frame, so that the I-shaped beam base piece is formed; secondly, manufacturing an I-shaped beam structure, coating fifth glue on a connecting interface between the second bamboo plywood and the I-shaped beam base piece and a connecting interface between the third bamboo plywood and the I-shaped beam base piece, and fixing the second bamboo plywood and the upper surface of the I-shaped beam base piece and the third bamboo plywood and the lower surface of the I-shaped beam base piece through third pins to form a double connecting interface of mechanical connection and complementary interface bonding of matching interfaces between the second bamboo plywood, the third bamboo plywood and the I-shaped beam base piece; and finally, installing the hoops, coating sixth glue on the inner sides of the hoops, and sleeving the hoops into the two ends of the composite beam structure and hooping the two ends of the I-shaped beam structure.

The combined I-beam according to the embodiment of the first aspect of the invention has the following advantages: has the following advantages: the winged steel bar frame can be automatically adjusted and designed based on the stress requirement of the I-shaped combined beam, the upper steel bar frame, the lower steel bar frame, the front-end steel bar frame and the rear-end steel bar frame of the winged steel bar frame can be automatically designed according to the stress requirement, the horizontal section of the winged steel bar frame is embedded and fixed in the upper surface and the lower surface with the maximum bending stress of the combined body, the front end and the rear end of the upper steel bar frame and the rear end of the lower steel bar frame are bent and respectively anchored and welded at the front end and the rear end of the combined body, a multi-functional steel bar framework with a hoop, compression tension resistance, end anchoring and continuous force transmission along the length of the beam is formed, and the defect that the common working performance is weakened due to slippage between the steel bar and wood after the traditional wood embedded steel bar beam is bent is overcome; secondly, a left long wood unit and a right long wood unit which are formed by double connection and combination of staggered laminated small-section short cylindrical bamboo pins and gluing based on the stress requirement of the I-shaped combination beam are respectively formed by an upper layer, a middle layer and a lower layer, wherein the upper layer and the lower layer which are stressed greatly are preferably hardwood with higher strength, the middle layer which is stressed slightly is soft wood with lower strength, and the middle layer can be laminated one layer or multiple layers according to the height requirement of the beam section; the third bamboo plywood and the second bamboo plywood are respectively and correspondingly fixed on the upper surface and the lower surface of the I-shaped beam base piece with the largest bending stress, and the strength of the bamboo plywood is twice as high as that of the template, so that the second bamboo plywood and the third bamboo plywood can obviously improve the bending rigidity, the bending bearing capacity and the shearing bearing capacity of the I-shaped composite beam, and the structures of different types of materials are efficiently matched based on the stress requirement of the I-shaped composite beam, so that the rigidity, the strength and the stability of the I-shaped composite beam are obviously improved; fourthly, the left long wood unit and the right long wood unit are combined together by the first bamboo plywood, and the first bamboo plywood not only plays a role in straight positioning, but also serves as a vertical core layer of the cross section of the beam to tightly connect the left long wood unit and the right long wood unit in the process of combining the first bamboo plywood, the left long wood unit and the right long wood unit, so that the defects of horizontal and vertical seams of the long wood unit integrated by the staggered laminated small short wood are overcome, the bending rigidity and the strength of the beam are remarkably improved, and the stress performance is good. Fifthly, the interfaces of the staggered laminated small short wood and the bamboo plywood are connected by adopting a pin and glue dual connection, so that a firm interface with complementary mechanical connection and interface bonding is formed, the force transmission among the winged reinforcement frame, the laminated small short wood and the bamboo plywood is ensured, and the performance of the combined parts working together is improved; sixthly, the small short wood is spliced and fixed in a staggered and laminated mode, so that the mechanical engaging force between the small short wood can be enhanced, the cost is low, and the stress performance of the combined beam is good; seventhly, the winged reinforcement frame, the long wood unit, the first bamboo plywood, the second bamboo plywood and the third bamboo plywood work together, are restricted with each other and are stressed cooperatively, the defect that bonding slippage between the reinforcement and the wood is large is overcome, and the left long wood unit and the right long wood unit have stress performance close to that of the log with the equal section, so that the short board with low tensile strength of the wood is made up; eighth, the small-section short wood, the bamboo plywood and the winged reinforcement frame are organically combined, the structure is simple, the connection is reliable, the ecological environment is protected, the resource utilization of forestry waste small-section logs and residual small-section wood processed in the wood industry and the comprehensive utilization of a large amount of ecological bamboos can be powerfully promoted; ninth, except that the end part of the combined I-shaped beam connected with the wall body or the wood column is provided with the visible I-shaped galvanized steel plate hoop, all steel parts are wrapped by wood and bamboo, the durability of the combined beam is obviously improved, the combined I-shaped beam is very suitable for village and town building structures with large volume and wide range, and the appearance of the combined I-shaped beam has the ecological sense of the traditional wood-bamboo structure beam. According to an embodiment of the first aspect of the invention, the first pin is a long cylindrical bamboo pin.

According to an embodiment of the first aspect of the present invention, the two adjacent small short woods in the left long wood unit and the two adjacent small end woods in the right long wood unit are connected and fixed by a second pin or dovetail groove connecting piece, and a fourth glue is used for fixing a connecting interface between the two adjacent small short woods in the left long wood unit and a connecting interface between the two adjacent small end woods in the right long wood unit.

According to a further embodiment of the first aspect of the present invention, the left longwood unit comprises a first web component, a first upper wing plate component and a first lower wing plate component, and the right longwood unit comprises a second web component, a second upper wing plate component and a second lower wing plate component; the first web plate component is formed by staggered and laminated arrangement of three or more layers of a part of the small short woods in the left long wood unit, the first upper wing plate component is formed by fixing the other part of the small short woods in the left long wood unit in a pairwise front-back adjacent arrangement mode, the first lower wing plate component is formed by fixing the other part of the small short woods in the left long wood unit in a pairwise front-back adjacent arrangement mode, and the first upper wing plate component and the first lower wing plate component are respectively and correspondingly fixed on the left side of the uppermost layer and the left side of the lowest layer of the first web plate component; the second web plate component is formed by staggered lamination of a plurality of small short wood in the long wood unit on the right side and a part of the small short wood in three layers or more than three layers, the second upper wing plate component is formed by fixing the small short wood in a pairwise front-back adjacent arrangement mode, the second lower wing plate component is formed by fixing the other parts of the small short wood in the long wood unit on the right side in a pairwise front-back adjacent arrangement mode, and the second upper wing plate component and the second lower wing plate component are correspondingly fixed on the right side of the uppermost layer and the right side of the lowermost layer of the second web plate component respectively.

According to yet a further embodiment of the first aspect of the invention, the material of the small short wood of the different layers in the left long wood unit and the right long wood unit is the same or different.

According to still further embodiment of the first aspect of the present invention, the upper and lower layers of the small short wood in the left and right long wood units are processed by high-strength hard wood, and the middle layer of the small short wood in the left and right long wood units is processed by low-strength soft wood.

According to a further embodiment of the first aspect of the present invention, the second pin is a first short cylindrical bamboo pin.

According to one embodiment of the first aspect of the present invention, the winged reinforcement cage is formed of a threaded steel bar.

According to an embodiment of the first aspect of the invention,

the upper steel bar frame comprises two upper longitudinal steel bars and at least one upper U-shaped steel bar, the two upper longitudinal steel bars are relatively spaced in the left-right direction and extend in the front-back direction, the front ends and the rear ends of the two upper longitudinal steel bars are respectively bent downwards to form upper bending sections, the upper U-shaped steel bars are arranged in a mode that openings are downward, and the upper ends of the upper U-shaped steel bars are respectively welded and fixed with the two upper longitudinal steel bars;

The lower steel bar frame comprises two lower longitudinal steel bars and at least one lower U-shaped steel bar, the two lower longitudinal steel bars are spaced in the left-right direction and extend in the front-back direction, the front ends and the rear ends of the two lower longitudinal steel bars are bent upwards respectively to form lower bending sections, the lower U-shaped steel bars are arranged with openings facing upwards, and the lower ends of the lower U-shaped steel bars are welded and fixed with the two lower longitudinal steel bars respectively;

the front-end reinforcing steel bar frame comprises two front-end vertical reinforcing steel bars and a plurality of front-end U-shaped reinforcing steel bars, the two front-end vertical reinforcing steel bars are oppositely spaced in the left-right direction, the upper ends of the two front-end vertical reinforcing steel bars are bent backwards and welded and fixed with the upper end of the foremost upper U-shaped reinforcing steel bar, the lower ends of the two front-end vertical reinforcing steel bars are bent backwards and welded and fixed with the lower end of the foremost lower U-shaped reinforcing steel bar, the plurality of front-end U-shaped reinforcing steel bars are arranged with openings facing backwards, the front ends of the plurality of front-end U-shaped reinforcing steel bars are welded and fixed with the two front-end vertical reinforcing steel bars respectively, the topmost one of the plurality of front-end U-shaped reinforcing steel bars is welded and fixed with the front ends of the two upper longitudinal reinforcing steel bars, and the bottommost one of the plurality of front-end U-shaped reinforcing steel bars is welded and fixed with the front ends of the two lower longitudinal reinforcing steel bars;

The rear end reinforcing steel bar frame comprises two rear end vertical reinforcing steel bars and a plurality of rear end U-shaped reinforcing steel bars, the two rear end vertical reinforcing steel bars are spaced relatively in the left-right direction, the two upper ends of the rear end vertical reinforcing steel bars are bent forwards and are welded and fixed with the last upper end of the upper U-shaped reinforcing steel bar, the two lower ends of the rear end vertical reinforcing steel bars are bent forwards and are welded and fixed with the last lower end of the lower U-shaped reinforcing steel bar, the plurality of rear end U-shaped reinforcing steel bars are arranged with openings forwards, the plurality of rear ends of the rear end U-shaped reinforcing steel bars are welded and fixed with the two rear ends of the upper longitudinal reinforcing steel bar respectively, the uppermost one of the plurality of rear end U-shaped reinforcing steel bars is welded and fixed with the two rear ends of the lower longitudinal reinforcing steel bar, and the lowermost one of the plurality of rear end U-shaped reinforcing steel bars is welded and fixed with the two rear ends of the lower longitudinal reinforcing steel bar.

According to an embodiment of the first aspect of the present invention, the second bamboo plywood and the upper surface of the i-beam base member and the third bamboo plywood and the lower surface of the i-beam base member are fixed by third pins, and a connection interface between the second bamboo plywood and the upper surface of the i-beam base member and a connection interface between the third bamboo plywood and the lower surface of the i-beam base member are fixed by fifth glue.

According to a further embodiment of the first aspect of the present invention, the third pin is a second short cylindrical bamboo pin.

According to an embodiment of the first aspect of the present invention, the ferrule is an i-shaped galvanized steel ferrule, and a connection interface between the ferrule and the i-shaped beam structure is fixed by a sixth glue.

The invention also provides a method for manufacturing the combined I-beam in any one of the embodiments of the first aspect.

According to the second aspect of the invention, the manufacturing method of the combined I-beam comprises the following steps:

manufacturing the left long wood unit and the right long wood unit: the left long wood unit and the right long wood unit are respectively formed by staggering, laminating and assembling a plurality of small short woods;

manufacturing the assembly: the left side surface of the first bamboo plywood and the right side surface of the left long wood unit and the right side surface of the first bamboo plywood and the left side surface of the right long wood unit are respectively bonded and fixed by the first glue, so that the combined body is formed;

installing the first pin: drilling a plurality of through holes penetrating through the left long wood unit, the first bamboo plywood and the right long wood unit of the combination body along the left-right direction at different positions of the combination body by using an electric drill, respectively coating second glue on the peripheral surfaces of the first pins, and then respectively embedding the first pins into the through holes in a one-to-one corresponding penetrating manner;

Processing groove-shaped mounting parts matched with the structural outline of the winged steel bar frame on the upper surface, the lower surface, the front end surface and the rear end surface of the combined body;

manufacturing the winged steel bar frame: separately manufacturing the upper reinforcement frame, the lower reinforcement frame, the front-end reinforcement frame, and the rear-end reinforcement frame;

manufacturing the I-shaped beam base piece: coating the third glue on the front-end steel bar frame, the rear-end steel bar frame, the upper steel bar frame and the lower steel bar frame, then respectively embedding the front-end steel bar frame, the rear-end steel bar frame, the upper steel bar frame and the lower steel bar frame into corresponding positions of the groove-shaped installation part in a matched manner, correspondingly welding and fixing the upper end and the lower end of the front-end steel bar frame with the front end of the upper steel bar frame and the front end of the lower steel bar frame, and correspondingly welding and fixing the upper end and the lower end of the rear-end steel bar frame with the rear end of the upper steel bar frame and the rear end of the lower steel bar frame, so that the I-shaped beam base member is formed;

manufacturing the I-shaped beam structure: fixing the second bamboo plywood and the third bamboo plywood on the upper surface and the lower surface of the I-shaped beam base part respectively and correspondingly so as to form the I-shaped beam structure;

installing the hoop: and sleeving a plurality of cuffs on the outer peripheral surface of the I-shaped beam structure.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a composite I-beam according to an embodiment of the first aspect of the present invention.

Figure 2 is a schematic structural view of an i-beam structure of a composite i-beam according to an embodiment of the first aspect of the present invention.

Fig. 3 is a schematic structural view of an i-beam base of a composite i-beam according to an embodiment of the first aspect of the present invention.

Fig. 4 is a schematic assembly view of the combined i-beam assembly, the second bamboo plywood, the third bamboo plywood and the third pin according to the first aspect of the present invention.

Figure 5 is a side view of one orientation of a left longwood unit and a right longwood unit of an embodiment of a composite i beam according to the first aspect of the present invention.

Fig. 6 is a schematic structural view of a winged steel reinforcement of the composite i-beam according to the first aspect of the present invention.

Figure 7 is a side view of one orientation of a longwood element of an embodiment of a composite i beam according to the first aspect of the present invention.

FIG. 8 is a schematic view of the assembly of the joists elements and the second pins in the fore-aft direction of the composite i-beam according to the embodiment of the first aspect of the present invention.

FIG. 9 is a schematic structural view of a dovetail connection of a composite I-beam according to an embodiment of the first aspect of the present invention.

Reference numerals:

combined I-beam 1000

Long wood unit 1

Left joists unit 101 first web assembly 1011 first upper wing plate assembly 1012 first lower wing plate assembly 1013

Second web assembly 1021 of right long wood unit 102 second upper web assembly 1022 second lower web assembly 1023

Groove-shaped mounting part 103

First bamboo plywood 2

First pin 3

Winged steel bar frame 4

U-shaped steel bars 4012 on longitudinal steel bars 4011 on upper steel bar frame 401

Lower longitudinal steel bar 4021 of lower steel bar rack 402 and lower U-shaped steel bar 4022

Front end vertical steel 4031 of front end steel frame 403 and front end U-shaped steel 4032

Rear end vertical reinforcement 4041 of rear end reinforcement cage 404 and rear end U-shaped reinforcement 4042

Second bamboo plywood 5

Third bamboo plywood 6

Ferrule 7

Second pin 8

Dovetail groove connecting piece 9

Third pin 10

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A composite i-beam 1000 according to an embodiment of the first aspect of an embodiment of the invention is described below in conjunction with figures 1 to 9.

As shown in fig. 1 to 9, in the composite i-beam 1000 according to the first aspect of the present invention, the composite i-beam 1000 is a winged steel bar frame-staggered laminated small short wood-bamboo plywood composite i-beam 1000, and includes a long wood unit 1, a first bamboo plywood 2, a plurality of first pins 3, a winged steel bar frame 4, a second bamboo plywood 5, a third bamboo plywood 6, and a plurality of hoops 7, the long wood unit 1 includes a left long wood unit 101 and a right long wood unit 102, and the left long wood unit 101 and the right long wood unit 102 are both trough-shaped and are respectively formed by splicing and fixing a plurality of staggered laminated small short wood; the first bamboo plywood 2 is positioned between the left long wood unit 101 and the right long wood unit 102, and the left side surface of the first bamboo plywood 2 and the right side surface of the left long wood unit 101 as well as the right side surface of the first bamboo plywood 2 and the left side surface of the right long wood unit 102 are fixed by first glue, so that an I-shaped combination body is formed; after second glue is coated on the peripheral surfaces of the first pins 3, the second glue penetrates through and is embedded into the left long wood unit 101, the first bamboo plywood 2 and the right long wood unit 102 of the assembly along the left-right direction; the winged steel frame 4 has a substantially i-shaped profile and includes an upper steel frame 401, a lower steel frame 402, a front end steel frame 403, and a rear end steel frame 404, wherein the upper steel frame 401 is embedded in the upper surfaces of the left, first, and right long wood units 101, 2, and 102 of the combined body, the front and rear ends of the upper steel frame 401 are bent downward to be embedded in the front and rear end surfaces of the left and right long wood units 101 and 102 of the combined body, respectively, the lower steel frame 402 is embedded in the lower surfaces of the left, first, and right long wood units 101, 2, and 102 of the combined body, the front and rear ends of the lower steel frame 402 are bent upward to be embedded in the front and rear end surfaces of the left and right long wood units 101 and 102 of the combined body, respectively, the front end steel frame 403 is embedded in the front and rear end surfaces of the upper and right long wood units 101, 2, and 102 of the combined body, and the front and rear end steel frames 401 and 404 of the upper and right long wood units 102 of the combined body, respectively, and the front end steel frame 403 are embedded in the lower steel frame 401 and rear end surfaces of the left and right long wood units 101, 2, and the combined body of the combined body, and the lower steel frame 402, respectively Welding and fixing, wherein a rear reinforcing frame 404 is embedded in the rear end surfaces of the left long wood unit 101, the first bamboo plywood 2 and the right long wood unit 102 of the combination body and is welded and fixed with the rear end of the upper reinforcing frame 401 and the rear end of the lower reinforcing frame 402, and connecting interfaces between the winged reinforcing frame 4 and the long wood unit 1 and between the first bamboo plywood 2 are fixed by third glue in a bonding manner, so that an I-shaped beam base member is formed; the second bamboo plywood 5 and the third bamboo plywood 6 are respectively and correspondingly fixed on the upper surface and the lower surface of the I-shaped beam base part, so that an I-shaped beam structure is formed; the plurality of hoops 7 are approximately H-shaped, and the plurality of hoops 7 are fittingly sleeved on the outer peripheral surface of the H-shaped beam structure.

Specifically, the long wood unit 1 comprises a left long wood unit 101 and a right long wood unit 102, wherein the left long wood unit 101 and the right long wood unit 102 are both groove-shaped and respectively formed by splicing and fixing a plurality of small short wood in a staggered and laminated manner; it can be understood that the small and short wood are spliced and fixed into the long wood unit 1 in a staggered and laminated mode, the mechanical engaging force between the small and short wood can be enhanced, the long wood unit is low in cost and good in stress performance, and the recycling of small-section logs of forestry wastes and small-section wood left in wood industry processing and the comprehensive recycling of a large amount of ecological bamboos are powerfully promoted.

The first bamboo plywood 2 is positioned between the left long wood unit 101 and the right long wood unit 102, and the left side surface of the first bamboo plywood 2 and the right side surface of the left long wood unit 101 as well as the right side surface of the first bamboo plywood 2 and the left side surface of the right long wood unit 102 are fixed by first glue, so that an I-shaped combination body is formed; it can be understood that the first bamboo plywood 2 combines the left long wood unit 101 and the right long wood unit 102 together, and because the first bamboo plywood 2 has high strength and good flatness, in the process of combining the first bamboo plywood 2, the left long wood unit 101 and the right long wood unit 102, the bamboo plywood not only plays a role of straight positioning, but also serves as a vertical core layer of the cross section of the beam to tightly connect the left long wood unit 101 and the right long wood unit 102, so that the defects of horizontal and vertical seams of the long wood unit 1 integrated by staggered laminated small short wood are overcome, the bending rigidity and strength of the beam are obviously improved, and the stress performance is good; the first glue is preferably latex, has firm bonding, good water resistance and weather resistance and low cost, can be structural glue, has high strength, peeling resistance and impact resistance, can bear larger load, is aging-resistant, fatigue-resistant and corrosion-resistant, has simple and convenient construction process, has stable performance in the expected service life of the structure, and has wide application range.

After second glue is coated on the peripheral surfaces of the first pins 3, the second glue penetrates through and is embedded into the left long wood unit 101, the first bamboo plywood 2 and the right long wood unit 102 of the assembly along the left-right direction; specifically, a first glue is adopted to bond and fix the left side surface of the first bamboo plywood 2 and the right side surface of the left long wood unit 101, and the right side surface of the first bamboo plywood 2 and the left side surface of the right long wood unit 102, holes are drilled in the left and right directions after the interface bonding reaches a certain strength, second glue is coated on the outer peripheral surfaces of the first pins 3, and the second glue penetrates through and is embedded into the holes of the left long wood unit 101, the first bamboo plywood 2 and the right long wood unit 102 of the combination body in the left and right directions, so that a double connection interface of mechanical connection of the matching interfaces between the left long wood unit 101, the right long wood unit 102 and the first bamboo plywood 2 and complementary interface bonding is formed; the second glue is preferably latex, has firm bonding, good water resistance and weather resistance and low cost, can be structural glue, has high strength, peeling resistance and impact resistance, can bear larger load, is aging-resistant, fatigue-resistant and corrosion-resistant, has simple and convenient construction process, has stable performance in the expected service life of the structure and wide application range.

The winged steel frame 4 has a substantially i-shaped profile and includes an upper steel frame 401, a lower steel frame 402, a front end steel frame 403, and a rear end steel frame 404, wherein the upper steel frame 401 is embedded in the upper surfaces of the left, first, and right long wood units 101, 2, and 102 of the combined body, the front and rear ends of the upper steel frame 401 are bent downward to be embedded in the front and rear end surfaces of the left and right long wood units 101 and 102 of the combined body, respectively, the lower steel frame 402 is embedded in the lower surfaces of the left, first, and right long wood units 101, 2, and 102 of the combined body, the front and rear ends of the lower steel frame 402 are bent upward to be embedded in the front and rear end surfaces of the left and right long wood units 101 and 102 of the combined body, respectively, the front end steel frame 403 is embedded in the front and rear end surfaces of the upper and right long wood units 101, 2, and 102 of the combined body, and the front and rear end steel frames 401 and 404 of the upper and right long wood units 102 of the combined body, respectively, and the front end steel frame 403 are embedded in the lower steel frame 401 and rear end surfaces of the left and right long wood units 101, 2, and the combined body of the combined body, and the lower steel frame 402, respectively Welding and fixing, wherein a rear reinforcing frame 404 is embedded in the rear end surfaces of the left long wood unit 101, the first bamboo plywood 2 and the right long wood unit 102 of the combination body and is welded and fixed with the rear end of the upper reinforcing frame 401 and the rear end of the lower reinforcing frame 402, and connecting interfaces between the winged reinforcing frame 4 and the long wood unit 1 and between the first bamboo plywood 2 are fixed by third glue in a bonding manner, so that an I-shaped beam base member is formed; it can be understood that the circumference of the combination of the upper steel frame 401, the lower steel frame 402, the front steel frame 403 and the rear steel frame 404 forms a multi-functional steel framework with a hoop 7, tension resistance, end anchoring and continuous force transmission along the length of the beam, and overcomes the defect that the common working performance is weakened by slippage between the steel bar and the wood after the traditional wood embedded steel beam is bent; the connection interfaces between the winged steel bar frame 4 and the long wood unit 1 and between the first bamboo plywood 2 are fixed by third glue bonding to form a double connection interface of mechanical interlocking connection and interface bonding complementation of the steel bars and the wood; the third glue is preferably a structural glue, has high strength, peeling resistance and impact resistance, can bear larger load, is aging-resistant, fatigue-resistant and corrosion-resistant, has simple and convenient construction process and stable performance in the expected life of the structure, can be used for bonding the same materials such as metal, wood and the like or different materials, and can reliably bond the winged steel bar frame 4 and the combined body; in addition, the steel bar material can be adopted in the countryside building structure with large volume, and the utilization rate of the steel bars is improved.

The second bamboo plywood 5 and the third bamboo plywood 6 are respectively and correspondingly fixed on the upper surface and the lower surface of the I-shaped beam base part, so that an I-shaped beam structure is formed; it can be understood that the bamboo plywood has strong tensile strength, and the bending stress on the upper surface and the lower surface of the combined i-beam 1000 is the greatest, and the bending rigidity, the bending bearing capacity and the shearing bearing capacity of the combined i-beam 1000 can be effectively improved by fixing the second bamboo plywood 5 and the third bamboo plywood 6 on the upper surface and the lower surface of the i-beam base part respectively. In addition, the bamboo plywood is better than a wood formwork in corrosion resistance, water resistance, fire resistance, compression resistance, tensile resistance, bending resistance and the like, the turnover frequency is obviously more than that of the wood formwork, the working stability and the safety are good, and the second bamboo plywood 5 and the third bamboo plywood 6 are made of bamboo wood, so that the utilization rate of bamboo resources is improved.

The plurality of hoops 7 are approximately H-shaped, and the plurality of hoops 7 are fittingly sleeved on the outer peripheral surface of the H-shaped beam structure. It can be understood that the hoop 7 is sleeved on the outer peripheral surface of the i-shaped beam structure to strengthen the constraint of the i-shaped beam structure, so that the structure of the combined i-shaped beam 1000 is more stable and has better integrity. Preferably, two cuffs 7 are respectively sleeved on the outer peripheral surfaces of the front end and the rear end of the I-shaped beam structure to strengthen the constraint of the two ends of the I-shaped beam structure.

According to the combined I-beam 1000 of the embodiment of the first aspect of the invention, the manufacturing process is as follows: according to the combined I-beam 1000 of the embodiment of the first aspect of the invention, the manufacturing process is as follows: firstly, a left long wood unit 101 and a right long wood unit 102 are manufactured, wherein the left long wood unit 101 and the right long wood unit 102 are respectively formed by staggering, laminating and assembling a plurality of small short woods; then, manufacturing a combination body, and bonding and fixing the left side surface of the first bamboo plywood 2 and the right side surface of the left long wood unit 101 and the right side surface of the first bamboo plywood 2 and the left side surface of the right long wood unit 102 by using first glue, thereby forming the combination body; then, installing a first pin 3, after the matching interface between the left side surface of the first bamboo plywood 2 and the right side surface of the left long wood unit 101 and the matching interface between the right side surface of the first bamboo plywood 2 and the left side surface of the right long wood unit 102 are bonded to reach a certain strength, drilling a plurality of through holes penetrating through the left long wood unit 101, the first bamboo plywood 2 and the right long wood unit 102 at different positions of the I-beam base piece along the left-right direction by using an electric drill, coating second glue on the outer peripheral surfaces of the plurality of first pins 3, penetrating and embedding the holes of the left long wood unit 101, the first bamboo plywood 2 and the right long wood unit 102 of the assembly along the left-right direction, and forming a double connection interface of mechanical connection and interface bonding complementation of the matching interfaces between the left long wood unit 101, the right long wood unit 102 and the first bamboo plywood 2; then, groove-shaped mounting parts 103 matched with the structural outline of the winged steel reinforcement frame 4 are processed on the upper surface, the lower surface, the front end surface and the rear end surface of the combined body; secondly, manufacturing a winged steel bar, and determining the sizes of the upper longitudinal steel bar 4011, the lower longitudinal steel bar 4021, the front end vertical steel bar 4031, the rear end vertical steel bar 4041, the upper U-shaped steel bar 4012, the lower U-shaped steel bar 4022, the front end U-shaped steel bar 4032 and the rear end U-shaped steel bar 4042 according to the stress requirement of the combined I-beam 1000; secondly, manufacturing an I-shaped beam base member, coating third glue on the front-end steel frame 403, the rear-end steel frame 404, the upper steel frame 401 and the lower steel frame 402, then respectively and adaptively embedding the third glue into corresponding positions of the groove-type installation part 103, then correspondingly welding and fixing the upper end and the lower end of the front-end steel frame 403 with the front end of the upper steel frame 401 and the front end of the lower steel frame 402, and correspondingly welding and fixing the upper end and the lower end of the rear-end steel frame 404 with the rear end of the upper steel frame 401 and the rear end of the lower steel frame 402, so as to form the I-shaped beam base member; secondly, manufacturing an I-beam structure, coating fifth glue on a connecting interface between the second bamboo plywood 5 and the I-beam base piece and a connecting interface between the third bamboo plywood 6 and the I-beam base piece, and fixing the second bamboo plywood 5 and the upper surface of the I-beam base piece and the third bamboo plywood 6 and the lower surface of the I-beam base piece through third pins 10 to form a double connecting interface of mechanical connection and complementary interface bonding of matching interfaces between the second bamboo plywood 5, the third bamboo plywood 6 and the I-beam base piece; and finally, installing the hoops 7, coating sixth glue on the inner sides of the hoops 7, and sleeving the hoops 7 into the two ends of the composite beam structure from the two ends of the composite beam structure and hooping the two ends of the I-beam structure.

The composite i-beam 1000 according to the embodiment of the first aspect of the present invention has the following advantages: has the following advantages: firstly, the winged steel bar frame 4 can be automatically adjusted and designed based on the stress requirement of the I-shaped composite beam, the upper steel bar frame 401, the lower steel bar frame 402, the front-end steel bar frame 403 and the rear-end steel bar frame 404 of the winged steel bar frame 4 can be automatically designed according to the stress requirement, the horizontal section of the winged steel bar frame 4 is embedded and fixed in the upper surface and the lower surface with the maximum bending stress of the composite body, the front end and the rear end of the upper steel bar frame 401 and the rear end of the lower steel bar frame 402 are bent and respectively anchored and welded at the front end and the rear end of the composite body, a multi-functional steel bar framework with hoop, compression resistance, end anchoring and continuous force transmission along the length of the beam is formed, and the defect that the common working performance is weakened due to slippage between the bent steel bar and the wood of the traditional wood embedded steel bar beam is overcome; secondly, a left long wood unit 101 and a right long wood unit 102 which are formed by double connection and combination of staggered laminated small-section short cylindrical bamboo pins and gluing based on the stress requirement of the I-shaped combination beam are respectively formed by laminating layers from top to bottom, wherein the upper layer and the lower layer which are stressed greatly are preferably hardwood with higher strength, the middle layer which is stressed slightly is soft wood with lower strength, and the middle layer can adopt one layer or multilayer lamination according to the height requirement of the beam section; the third bamboo plywood 5, the second bamboo plywood 5 and the third bamboo plywood 6 are respectively and correspondingly fixed on the upper surface and the lower surface of the I-shaped beam base piece with the maximum bending stress, and the strength of the bamboo plywood is twice as high as that of the template, so that the second bamboo plywood 5 and the third bamboo plywood 6 can obviously improve the bending rigidity, the bending bearing capacity and the shearing bearing capacity of the I-shaped composite beam, and the rigidity, the strength and the stability of the I-shaped composite beam are obviously improved by efficiently matching the structures of different types of materials based on the stress requirement of the I-shaped composite beam; fourthly, the left long wood unit 101 and the right long wood unit 102 are combined together through the first bamboo plywood 2, and due to the fact that the first bamboo plywood 2 is high in strength and good in flatness, in the process of combining the first bamboo plywood 2, the left long wood unit 101 and the right long wood unit 102, the first bamboo plywood 2 not only plays a role of straight positioning, but also serves as a vertical core layer of the cross section of the beam to tightly connect the left long wood unit 101 and the right long wood unit 102, the defects of horizontal and vertical seams of the long wood unit 1 integrated by the staggered laminated small short wood are overcome, bending rigidity and strength of the beam are remarkably improved, and stress performance is good. Fifthly, the interfaces of the staggered laminated small short wood and the bamboo plywood are connected by adopting a pin and glue dual connection, so that a firm interface with complementary mechanical connection and interface bonding is formed, the force transmission between the winged reinforcement frame 4-the laminated small short wood-the bamboo plywood is ensured, and the performance of the combined parts working together is improved; sixthly, the small short wood is spliced and fixed in a staggered and laminated mode, so that the mechanical engaging force between the small short wood can be enhanced, the cost is low, and the stress performance of the combined beam is good; seventh, the winged reinforcement frame 4, the long wood unit 1, the first bamboo plywood 2, the second bamboo plywood 5 and the third bamboo plywood 6 work together, are restricted with each other and stressed cooperatively, so that the defect of large bonding slippage of the reinforcement and the wood is overcome, and the left long wood unit 101 and the right long wood unit 102 have the stress performance close to that of the log with the equal section, so that the short board with low tensile strength of the wood is made up; eighth, the small-section short wood, the bamboo plywood and the winged reinforcement frame 4 are organically combined, the structure is simple, the connection is reliable, the ecological environment is protected, and the resource utilization of forestry waste small-section logs and residual small-section wood processed in the wood industry and the comprehensive utilization of a large amount of ecological bamboos can be powerfully promoted; ninth, except for the visible I-shaped galvanized steel plate hoop 7 at the end part connected with the wall body or the wood column, all steel parts of the combined I-shaped beam 1000 are wrapped by wood and bamboo, so that the durability of the combined beam is obviously improved, the combined I-shaped beam is very suitable for village and town building structures with large volume and wide range, and the appearance of the combined I-shaped beam has the ecological sense of the traditional wood-bamboo structure beam.

According to one embodiment of the first aspect of the invention, the first spike 3 is a long cylindrical bamboo spike. Specifically, after second glue is coated on the outer peripheral surfaces of the long cylindrical bamboo pins, the long cylindrical bamboo pins penetrate through and are embedded into the left long wood unit 101, the first bamboo plywood 2 and the right long wood unit 102 of the combined body along the left-right direction, the length dimension of the long cylindrical bamboo pins is equal to the width dimension of the combined I-beam 1000 along the left-right direction, and the diameter of the long cylindrical bamboo pins is not smaller than 8mm, so that the long cylindrical bamboo pins can reliably fix the combined I-beam 1000 along the left-right direction, the strength of the long cylindrical bamboo pins is guaranteed, and the situations of fracture and the like in the using process are avoided. The number of the long cylindrical bamboo pins is determined according to the requirement. In addition, the long cylindrical bamboo pin is made of bamboo, the utilization rate of bamboo resources is improved, and the long cylindrical bamboo pin is high in tensile strength and good in elasticity and flexibility; the long cylindrical bamboo pins and the second glue can form a double-connection interface of mechanical connection and interface bonding complementation of the connection interface of the left long wood unit 101, the first bamboo plywood 2 and the right long wood unit 102 of the base part of the I-shaped beam, so that the force transmission among the combined I-shaped beam 1000 is ensured, and the performance of the joint work of the whole combined I-shaped beam 1000 is improved.

According to an embodiment of the first aspect of the present invention, the two adjacent small short woods in the left long wood unit 101 and the two adjacent small end woods in the right long wood unit 102 are connected and fixed by the second pin 8 or the dovetail groove connecting piece 9, and the connecting interface between the two adjacent small short woods in the left long wood unit 101 and the connecting interface between the two adjacent small end woods in the right long wood unit 102 are fixed by the fourth glue. Therefore, the interface of the small short wood connection interface mechanical connection and the interface bonding complementary dual connection interface can be formed, the transmission of force between the combined I-beam 1000 is ensured, and the performance of the joint work of the whole combined I-beam 1000 is improved. In addition, the fourth glue is preferably selected from latex, the latex has the advantages of firm bonding, good water resistance and weather resistance, the fourth glue can also be structural glue, the structural glue is high in strength, resistant to stripping and impact, capable of bearing large loads, resistant to aging, fatigue and corrosion, simple and convenient in construction process, stable in performance within the expected service life of the structure, and wide in application range.

According to a further embodiment of the first aspect of the present invention, the left long wood unit 101 comprises a first web assembly 1011, a first upper wing plate assembly 1012 and a first lower wing plate assembly 1013, and the right long wood unit 102 comprises a second web assembly 1021, a second upper wing plate assembly 1022 and a second lower wing plate assembly 1023; the first web plate assembly 1011 is formed by staggered and laminated three or more layers of a part of small short woods in the left long wood unit 101, the first upper wing plate assembly 1012 is formed by fixing the other part of small short woods in the left long wood unit 101 in a pairwise front-back adjacent arrangement mode, the first lower wing plate assembly 1013 is formed by fixing the other part of small short woods in the left long wood unit 101 in a pairwise front-back adjacent arrangement mode, and the first upper wing plate assembly 1012 and the first lower wing plate assembly 1013 are respectively and correspondingly fixed on the left side of the uppermost layer and the left side of the lowermost layer of the first web plate assembly 1011; the second web plate component 1021 is formed by staggered lamination of three or more layers of a part of small short woods in the right long wood unit 102, the second upper wing plate component 1022 is formed by fixing the other part of small short woods in the right long wood unit 102 in a pairwise front-back adjacent arrangement mode, the second lower wing plate component 1023 is formed by fixing the other part of small short woods in the left long wood unit 101 in a pairwise front-back adjacent arrangement mode, and the second upper wing plate component 1022 and the second lower wing plate component 1023 are respectively and correspondingly fixed on the right side of the uppermost layer and the right side of the lowermost layer of the second web plate component 1021.

Specifically, a second pin 8 or a dovetail groove 9 is adopted between two small short woods in front and back of each upper wing plate component 1012, between two small short woods in front and back of each lower wing plate component 1013, between the left sides of the uppermost layers of the first upper wing plate component 1012 and the first web plate component 1011, between the left sides of the lowermost layers of the first lower wing plate component 1013 and the first web plate component 1011, between two small short woods in front and back of each layer in different layers, between two small short woods in front and back of each second upper wing plate component 1022, between two small short woods in front and back of each layer in the second lower wing plate component 1023, between the right sides of the uppermost layers of the second upper wing plate component 1023 and the second web plate component 1021, between two small short woods in front and back of each layer in the second web plate component 1021, and between two small short woods in front and back of each layer in different layers and between two small woods in different layers Splicing and fixing, connecting interfaces between two front and back adjacent small short woods of the first upper wing plate component 1012, between two front and back adjacent small short woods of the first lower wing plate component 1013, between the left sides of the uppermost layers of the first upper wing plate component 1012 and the first web plate component 1011, between the left sides of the lowermost layers of the first lower wing plate component 1013 and the first web plate component 1011, between two front and back adjacent small woods of each layer in the first web plate component 1011, between two upper and lower adjacent small woods of different layers, between two front and back adjacent small woods of the second upper wing plate component 1022, between two front and back adjacent small woods of the second lower wing plate component 1023, between the right sides of the uppermost layers of the second upper wing plate component 1023 and the right sides of the lowermost layers of the second web plate component 1021, between two front and back adjacent small woods of each layer in the second web plate component 1021 and between two upper and lower adjacent small woods of different layers are all fixed by fourth glue The fourth glue is preferably latex, and the latex has the advantages of firm bonding, good water resistance and weather resistance, and can also be structural glue which has high strength, peeling resistance, impact resistance, larger load bearing capacity, aging resistance, fatigue resistance, corrosion resistance, simple and convenient construction process, stable performance within the expected service life of the structure and wide application range, so that the fourth glue can reliably bond two adjacent small short woods in the front and at the back of each layer and two adjacent small short woods in the upper and lower of different layers.

It should be noted that the joint between two adjacent front and back short woods in the left long wood unit 101 and the joint between two adjacent front and back short woods in the right long wood unit 102 are symmetrically or asymmetrically arranged. The number of layers in the left long wood unit 101 may be the same as or different from the number of layers in the right long wood unit 102; the lengths of the small short wood of the left long wood unit 101 and the right long wood unit 102 on the same layer can be symmetrical or asymmetrical; the cross section of the small short wood is rectangular, the side length of the cross section of the small short wood is not less than 40mm, and the length of the small short wood in the front-back direction is not less than 1/4 of the length of the combined I-beam 1000. Like this, little short wood all is in reasonable within range at cross section and the ascending size of fore-and-aft direction, conveniently becomes long wooden unit 1 with a plurality of little short wood systems, and the long wooden unit 1 atress performance of accomplishing of preparation is good, and stable in structure avoids leading to the glue quantity many and the structure to be destroyed easily because little short wood size undersize.

According to yet a further embodiment of the first aspect of the present invention, the material of the different layers of small short wood within the left long wood unit 101 and the right long wood unit 102 is the same or different. It can be understood that the types of the forestry waste small short wood and the wood industry processing waste small short wood are more, when the materials of the small short wood in different layers in the left long wood unit 101 and the right long wood unit 102 are the same, the combined I-beam 1000 is more attractive, and when the materials of the small short wood in different layers in the left long wood unit 101 and the right long wood unit 102 are different, the utilization rate of the forestry waste small short wood and the wood industry processing waste small short wood can be improved.

According to a still further embodiment of the first aspect of the present invention, the upper and lower small short woods in the left and right long wood units 101 and 102 are processed using high-strength hardwoods, and the middle small short woods in the left and right long wood units 101 and 102 are processed using low-strength softwoods. It is understood that, when the material of the uppermost and lowermost small short wood in the left and right long wood units 101 and 102 is hardwood, the thickness of the uppermost and lowermost small short wood in the left and right long wood units 101 and 102 is relatively small due to high strength of the hardwood, thereby saving the hardwood, and at the same time, the material of the intermediate small short wood in the left and right long wood units 101 and 102 may be softwood, and the intermediate layer in the left and right long wood units 101 and 102 may be one layer and the thickness of the intermediate layer is large or multiple layers and the thickness of the intermediate layer is small due to low strength of the softwood. The wood with different strengths is selected according to the stress requirements of the combined I-beam 1000, so that the full play of the strengths of different woods is facilitated, the comprehensive utilization efficiency of small short wood made of different materials is improved, the stress performance of the combined beam can be obviously improved under the same manufacturing cost, and the cost performance is high.

It should be noted that no small short wood joints are arranged at the uppermost layer and the lowermost layer of the long wood unit 11 of the 1/2 long section in the beam span with the larger beam bending moment, so that the working performance of the whole combined I-beam 1000 is ensured.

According to a further embodiment of the first aspect of the invention, the second pin 8 is a first short cylindrical bamboo pin. Specifically, the two small short woods in each layer of the left long wood unit 101 and the right long wood unit 102, which are adjacent in the front and back direction, and the two small short woods in different layers of the left long wood unit 101 and the right long wood unit 102, which are adjacent in the up and down direction, can be spliced and fixed by adopting first short cylindrical bamboo pins, so that the splicing and fixing are convenient and reliable; first short cylinder bamboo pin's length is not less than 40mm and the diameter is not less than 6mm, like this, both can link up a plurality of little quarter woods through first short cylinder bamboo pin firm, and is high-efficient fixed, can guarantee first short cylinder bamboo pin self intensity again, difficult emergence fracture. The number of the first short cylindrical bamboo pins is determined according to the requirement. In addition, first short cylinder bamboo pin is made by the bamboo timber, has improved the utilization ratio of bamboo class resource, and first short cylinder bamboo pin's tensile strength is high, and elasticity and softness are good.

According to one embodiment of the first aspect of the invention, the winged steel reinforcement cage 4 is made of a threaded steel bar. It can be understood that the rebar and the long wood unit 1 are reliably fixed, and therefore the winged steel reinforcement frame 4 can overcome the defect that the bonding slippage of the rebar and the wood is large after the rebar and the wood are bent.

According to an embodiment of the first aspect of the invention,

the upper steel bar frame 401 comprises two upper longitudinal steel bars 4011 and at least one upper U-shaped steel bar 4012, the two upper longitudinal steel bars 4011 are relatively spaced in the left-right direction and extend in the front-back direction, the front ends and the rear ends of the two upper longitudinal steel bars 4011 are respectively bent downwards to form upper bending sections, the upper U-shaped steel bars 4012 are arranged with openings facing downwards, and the upper ends of the upper U-shaped steel bars 4012 are respectively welded and fixed with the two upper longitudinal steel bars 4011;

the lower reinforcement frame 402 comprises two lower longitudinal reinforcements 4021 and at least one lower U-shaped reinforcement 4022, the two lower longitudinal reinforcements 4021 are relatively spaced in the left-right direction and extend in the front-back direction, the front ends and the rear ends of the two lower longitudinal reinforcements 4021 are respectively bent upwards to form lower bending sections, the lower U-shaped reinforcement 4022 is arranged with an upward opening, and the lower end of the lower U-shaped reinforcement 4022 is welded and fixed with the two lower longitudinal reinforcements 4021;

the front-end steel bar rack 403 includes two front-end vertical steel bars 4031 and a plurality of front-end U-shaped steel bars 4032, the two front-end vertical steel bars 4031 are relatively spaced apart in the left-right direction, the upper ends of the two front-end vertical steel bars 4031 are both bent backwards and welded and fixed to the upper end of the foremost upper U-shaped steel bar 4012, the lower ends of the two front-end vertical steel bars 4031 are both bent backwards and welded and fixed to the lower end of the foremost lower U-shaped steel bar 4022, the plurality of front-end U-shaped steel bars 4032 are arranged with openings facing backwards, the front ends of the plurality of front-end U-shaped steel bars 4032 are respectively welded and fixed to the two front-end vertical steel bars 4031, the uppermost one of the plurality of front-end U-shaped steel bars 4032 is also welded and fixed to the front ends of the two upper longitudinal steel bars 4011, and the lowermost one of the plurality of front-end U-shaped steel bars 4032 is also welded and fixed to the front ends of the two lower longitudinal steel bars 4021;

The rear-end reinforcing bar frame 404 includes two rear-end vertical reinforcing bars 4041 and a plurality of rear-end U-shaped reinforcing bars 4042, two rear-end vertical reinforcing bars 4041 are spaced apart relatively in the left-right direction, the upper ends of two rear-end vertical reinforcing bars 4041 are all bent forward and welded and fixed with the upper end of the last upper U-shaped reinforcing bar 4012, the lower ends of two rear-end vertical reinforcing bars 4041 are all bent forward and welded and fixed with the lower end of the last lower U-shaped reinforcing bar 4022, the plurality of rear-end U-shaped reinforcing bars 4042 are open-ended and arranged forward, the rear ends of the plurality of rear-end U-shaped reinforcing bars 4042 are welded and fixed with the two rear-end vertical reinforcing bars 4041, the uppermost one of the plurality of rear-end U-shaped reinforcing bars 4042 is also welded and fixed with the rear ends of the two upper longitudinal reinforcing bars 4011, the lowermost one of the plurality of rear-end U-shaped reinforcing bars 4042 is also welded and fixed with the rear ends of the two lower longitudinal reinforcing bars 4021.

It can be understood that the dimensions of the upper longitudinal reinforcement 4011, the lower longitudinal reinforcement 4021, the front vertical reinforcement 4031, the rear vertical reinforcement 4041, the upper U-shaped reinforcement 4012, the lower U-shaped reinforcement 4022, the front U-shaped reinforcement 4032 and the rear U-shaped reinforcement 4042 are determined according to the stress requirements of the composite i-beam 1000, the slotted mounting portions 103 matched with the structural profile of the winged reinforcement 4 are formed on the upper surface, the lower surface, the front end surface and the rear end surface of the composite, the upper reinforcement 401, the lower reinforcement 402, the front reinforcement 403 and the rear reinforcement 404 are respectively embedded on the slotted mounting portions 103 on the upper surface, the lower surface, the front end surface and the rear end surface of the composite, and during the embedding, the connection interfaces between the upper reinforcement 401, the lower reinforcement 402, the front reinforcement 403, the rear reinforcement 404 and the long wood unit 1 and between the first bamboo plywood 2 are fixed by structural adhesive, so as to form a dual connection interface of mechanical interlocking and interface complementary bonding of the wood bar and wood material, after the installation is finished, the upper ends of the upper U-shaped reinforcing bars 4012 are respectively welded and fixed with the two upper longitudinal reinforcing bars 4011; the lower ends of the lower U-shaped reinforcing steel bars 4022 are welded and fixed with the two lower longitudinal reinforcing steel bars 4021 respectively; the upper ends of two front-end vertical steel bars 4031 are welded and fixed with the upper end of the foremost upper U-shaped steel bar 4012, the lower ends of the two front-end vertical steel bars 4031 are welded and fixed with the lower end of the foremost lower U-shaped steel bar 4022, the front ends of the plurality of front-end U-shaped steel bars 4032 are respectively welded and fixed with the two front-end vertical steel bars 4031, the uppermost front-end U-shaped steel bar 4032 in the plurality of front-end U-shaped steel bars 4032 is welded and fixed with the front ends of the two upper longitudinal steel bars 4011, and the lowermost front-end U-shaped steel bar 4032 in the plurality of front-end U-shaped steel bars 4032 is welded and fixed with the front ends of the two lower longitudinal steel bars 4021; the upper ends of two rear end vertical reinforcing bars 4041 are welded and fixed with the upper end of the last upper U-shaped reinforcing bar 4012, the lower ends of the two rear end vertical reinforcing bars 4041 are welded and fixed with the lower end of the last lower U-shaped reinforcing bar 4022, the rear ends of the plurality of rear end U-shaped reinforcing bars 4042 are welded and fixed with the two rear end vertical reinforcing bars 4041 respectively, the uppermost rear end U-shaped reinforcing bar 4042 of the plurality of rear end U-shaped reinforcing bars 4042 is welded and fixed with the rear ends of the two upper longitudinal reinforcing bars 4011, and the lowermost rear end U-shaped reinforcing bar 4042 of the plurality of rear end U-shaped reinforcing bars 4042 is also welded and fixed with the rear ends of the two lower longitudinal reinforcing bars 4021. Therefore, a multi-functional steel bar framework with a hoop 7, compression tension resistance, end anchoring and continuous force transmission along the length of the beam is formed, the winged steel bar frame 4, the staggered laminated small short wood long wood units 1 and the I-shaped bamboo plywood stiffness units work together, are restricted mutually and are stressed cooperatively, the defect that the common working performance is weakened by sliding between the steel bar and the wood after the traditional wood embedded steel bar beam is bent is overcome, the bonding performance is good, the service life is long, the construction process is simple and convenient, the performance is stable within the expected service life of the structure, and the embedding is firm and reliable.

According to an embodiment of the first aspect of the present invention, the second bamboo plywood 5 and the upper surface of the i-beam base member and the third bamboo plywood 6 and the lower surface of the i-beam base member are fixed by the third pins 10, and the connection interface between the second bamboo plywood 5 and the upper surface of the i-beam base member and the connection interface between the third bamboo plywood 6 and the lower surface of the i-beam base member are fixed by the fifth glue. Therefore, a connecting interface between the second bamboo plywood 5 and the I-shaped beam base part, and a connecting interface between the third bamboo plywood 6 and the I-shaped beam base part are mechanically connected and interface bonding complementary double-connecting interfaces can be formed, so that the force transmission between the combined I-shaped beam 1000 is ensured, and the performance of the joint work of the whole combined I-shaped beam 1000 is improved. The second bamboo plywood 5 and the upper surface of the I-shaped beam base piece and the third bamboo plywood 6 and the lower surface of the I-shaped beam base piece are fixed through the third pins 10, the fixing mode is simple and reliable, and the number of the third pins 10 is determined according to requirements.

It should be noted that, the span area of the beam is made of a whole bamboo plywood, joints of the bamboo plywood are arranged at two ends of the beam when the length of the finished bamboo plywood is smaller than the length of the beam, and the joints are staggered from the joints of the small short wood at the uppermost layer and the lowermost layer of the left long wood unit 101 and the joints of the small short wood at the uppermost layer and the lowermost layer of the right long wood unit 102 by not less than 100mm, so as to ensure the stress performance of the combined I-beam 1000.

According to a further embodiment of the first aspect of the invention, the third pin 10 is a second short cylindrical bamboo pin. It can be understood that the third pin 10 can be a second short cylindrical bamboo pin made of bamboo, which improves the utilization rate of bamboo resources, and the second short cylindrical bamboo pin has high tensile strength and good elasticity and flexibility; the fifth glue is preferably selected from latex which has the advantages of firm bonding, good water resistance and good weather resistance, the fifth glue can also be structural glue which has high strength, stripping resistance and impact resistance, can bear larger load, is aging-resistant, fatigue-resistant and corrosion-resistant, has simple and convenient construction process, stable performance in the expected service life of the structure and wide application range, and thus, the fifth glue can reliably bond the second bamboo plywood 5 and the I-shaped beam base member as well as the third bamboo plywood 6 and the I-shaped beam base member.

According to one embodiment of the first aspect of the present invention, the ferrule 7 is an i-shaped galvanized steel ferrule 7, and the connection interface between the ferrule 7 and the i-shaped beam structure is fixed by a sixth glue. Specifically, the I-shaped galvanized steel sheet hoop 7 is tightly sleeved from two ends of the I-shaped beam structure, a sixth glue is brushed on a connecting interface between the hoop 7 and the I-shaped beam structure to realize bonding of the interface between the I-shaped galvanized steel sheet hoop 7 and the I-shaped beam structure, and the two ends of the I-shaped beam structure are reinforced and restrained through the hoop 7. In addition, the sixth glue is preferably a structural glue, the structural glue has high strength, is anti-stripping and impact-resistant, can bear larger load, is aging-resistant, fatigue-resistant and corrosion-resistant, has a simple construction process, has stable performance within the expected service life of the structure and a wide application range, and can reliably bond the hoop 7 and the I-shaped beam structure.

It should be noted that the thickness of the ferrule 7 is not less than 2mm, and the width of the ferrule 7 is not less than 40mm, so as to ensure the strength of the ferrule 7, so that the ferrule 7 can reliably strengthen and restrain the two ends of the i-beam structure, and the actual size of the thickness and the width of the ferrule 7 is determined by specific conditions.

The second aspect of the present invention also provides a method for manufacturing the composite i-beam 1000 according to any one of the embodiments of the first aspect.

The method for manufacturing the composite I-beam 1000 according to the second aspect of the present invention comprises the following steps:

manufacturing a left long wood unit 101 and a right long wood unit 102: the left long wood unit 101 and the right long wood unit 102 are respectively formed by staggering, laminating and assembling a plurality of small short woods;

specifically, each layer of the first web plate assembly 1011 and the second web plate assembly 1021 of the left long wood unit 101 and the right long wood unit 102 is manufactured firstly, two adjacent front and back short woods in each layer of the first web plate assembly 1011 and two adjacent front and back short woods in each layer of the second web plate assembly 1021 are spliced and fixed through a first short cylindrical bamboo pin or dovetail groove connecting piece 9, a connecting interface between the two adjacent front and back short woods in each layer of the first web plate assembly 1011 and a connecting surface between the two adjacent front and back short woods in each layer of the second web plate assembly 1021 are fixed by adopting fourth glue, so that each layer of the first web plate assembly 1021 and each layer of the second web plate assembly 1021 are formed, and the joints of the two adjacent front and back short woods are staggered; secondly, manufacturing a first web plate component 1011 and a second web plate component 1021 of the first upper wing plate component 1012, splicing and fixing two small short woods, which are adjacent from top to bottom, of different layers of the first web plate component 1011 and the second web plate component 1021 through a first short cylindrical bamboo pin, and fixing a connecting interface between the two small short woods, which are adjacent from top to bottom, of the different layers by adopting a fourth glue to form the first web plate component 1011 and the second web plate component 1021; then, a first upper wing plate component 1012, a first lower wing plate component 1013, a second upper wing plate component 1022 and a second lower wing plate component 1023 are manufactured, two small short woods which are adjacent to each other in the front and back in the first upper wing plate component 1012, the first lower wing plate component 1013, the second upper wing plate component 1022 and the second lower wing plate component 1023 are spliced and fixed through a first short cylindrical bamboo pin or dovetail joint 9, and a connecting interface between the two small woods which are adjacent to each other in the front and back in the first upper wing plate component 1012, the first lower wing plate component 1013, the second upper wing plate component 1022 and the second lower wing plate component 1023 is fixed through a fourth glue so as to form a first upper wing plate component 10231012, a first lower wing plate component 1013, a second upper wing plate component 1022 and a second lower wing plate component 1023; then, a left long wood unit 101 and a right long wood unit 102 are fabricated, and the short wood of the first upper wing plate assembly 1012 and the short wood of the uppermost layer of the first web assembly 1011, the short wood of the first lower wing plate assembly 1013 and the short wood of the lowermost layer of the first web assembly 1011, the short wood of the second upper wing plate assembly 1022 and the short wood of the uppermost layer of the first web assembly 1011, and the short wood of the second lower wing plate assembly 1023 and the short wood of the lowermost layer of the second web assembly 1021, which are adjacent to each other in the left-right direction, are spliced and fixed by a first short cylindrical bamboo pin or dovetail joint 9, and the short wood of the first upper wing plate assembly 1012 and the short wood of the uppermost layer of the first web assembly 1011, the short wood of the first lower wing plate assembly 1013 and the short wood of the lowermost layer of the first web assembly 1011, the short wood of the second upper wing plate assembly 1022 and the short wood of the uppermost layer of the first web assembly 1011, and the short wood of the group of the second lower wing plate assembly 1023 and the second web assembly 1023, which are adjacent to each other in the left-right direction The connecting interface between the lowest layer of small short wood of the piece 1021 is fixed by fourth glue bonding to form a left long wood unit 101 and a right long wood unit 102;

Manufacturing a combination: respectively adopting first glue to bond and fix the left side surface of the first bamboo plywood 2 and the right side surface of the left long wood unit 101 and the right side surface of the first bamboo plywood 2 and the left side surface of the right long wood unit 102 so as to form a combined body;

mounting the first pin 3: drilling a plurality of through holes penetrating through the left long wood unit 101, the first bamboo plywood 2 and the right long wood unit 102 of the combination body along the left-right direction at different positions of the combination body by using an electric drill, respectively coating second glue on the peripheral surfaces of the first pins 3, and then respectively embedding the first pins 3 into the through holes in a one-to-one corresponding penetrating manner;

specifically, the left side surface of the first bamboo plywood 2 and the right side surface of the left long wood unit 101 and the right side surface of the first bamboo plywood 2 and the left side surface of the right long wood unit 102 are fixed by first glue in a bonding mode, after the interface bonding reaches a certain strength, a plurality of through holes penetrating through the left long wood unit 101, the first bamboo plywood 2 and the right long wood unit 102 are drilled at different positions of the I-shaped beam base piece along the left-right direction by electric drilling, second glue is coated on the outer peripheral surfaces of the first pins 3 and penetrates through and is embedded into the holes of the left long wood unit 101, the first bamboo plywood 2 and the right long wood unit 102 of the assembly along the left-right direction, and a dual connection interface of mechanical connection and interface bonding complementation of the matching interfaces between the left long wood unit 101, the right long wood unit 102 and the first bamboo plywood 2 is formed.

The upper surface, the lower surface, the front end surface and the rear end surface of the combined body are provided with groove-shaped mounting parts 103 matched with the structural outline of the winged steel bar frame 4;

specifically, round holes and grooves for fitting with the winged steel frames 4 are formed on the upper surface, the lower surface, the front end surface and the rear end surface of the combined body, round holes for fitting with the lower ends of the upper U-shaped reinforcing bars 4012 are formed on the upper surface of the combined body, horizontal grooves for fitting with the upper ends of the upper U-shaped reinforcing bars 4012 are formed, longitudinal horizontal grooves for fitting with the bent sections of the upper longitudinal reinforcing bars 4011 and the front end U-shaped reinforcing bars 4032 and the bent sections of the rear end U-shaped reinforcing bars 4042 are formed, round holes for fitting with the upper ends of the lower U-shaped reinforcing bars 4022 are formed on the lower surface of the combined body, horizontal grooves for fitting with the lower ends of the lower U-shaped reinforcing bars 4022 are formed, longitudinal horizontal grooves for fitting with the bent sections of the lower longitudinal reinforcing bars 4021 and the front end U-shaped reinforcing bars 4032 and the bent sections of the rear end U-shaped reinforcing bars 4042 are formed, grooves for fitting with the upper bent sections of the upper reinforcing bars 401 and the lower bent sections of the lower bent frames 402 are formed at both ends of the combined body, round holes assembled with the rear end of the front-end U-shaped steel bar 4032 are made in the front end of the combination, grooves assembled with the front ends of the front-end vertical steel bar 4031 and the front-end U-shaped steel bar 4032 are made in the rear end of the combination, round holes assembled with the front end of the rear-end U-shaped steel bar 4042 are made in the rear end of the combination, and grooves assembled with the rear ends of the rear-end vertical steel bar 4041 and the rear-end U-shaped steel bar 4042 are made in the rear end of the combination.

Manufacturing a winged steel bar frame 4: an upper steel bar frame 401, a lower steel bar frame 402, a front end steel bar frame 403 and a rear end steel bar frame 404 are separately manufactured;

specifically, the dimensions of the upper longitudinal reinforcement 4011, the lower longitudinal reinforcement 4021, the front end vertical reinforcement 4031, the rear end vertical reinforcement 4041, the upper U-shaped reinforcement 4012, the lower U-shaped reinforcement 4022, the front end U-shaped reinforcement 4032, and the rear end U-shaped reinforcement 4042 are determined according to the stress requirements of the combined i-beam 1000.

Manufacturing an I-shaped beam base piece: coating third glue on the front-end steel bar frame 403, the rear-end steel bar frame 404, the upper steel bar frame 401 and the lower steel bar frame 402, then respectively and adaptively embedding the third glue into corresponding positions of the groove-type installation part 103, correspondingly welding and fixing the upper end and the lower end of the front-end steel bar frame 403 with the front end of the upper steel bar frame 401 and the front end of the lower steel bar frame 402, and correspondingly welding and fixing the upper end and the lower end of the rear-end steel bar frame 404 with the rear end of the upper steel bar frame 401 and the rear end of the lower steel bar frame 402, thereby forming the I-shaped beam base member; specifically, the circular hole on the upper surface of the combination is assembled with the lower end of the upper U-shaped reinforcement 4012, the horizontal groove is assembled with the upper longitudinal reinforcement 4011, the bent section of the front U-shaped reinforcement 4032, and the bent section of the rear U-shaped reinforcement 4042, the circular hole on the lower surface of the combination is assembled with the upper end of the lower U-shaped reinforcement 4022, the horizontal groove is assembled with the lower longitudinal reinforcement 4021, the bent section of the front U-shaped reinforcement 4022, and the bent section of the rear U-shaped reinforcement 4042, the grooves on both ends of the combination are assembled with the upper bent section of the upper reinforcement 4031 and the lower bent section of the lower reinforcement 4032, the circular hole on the front end of the combination is assembled with the rear end of the front U-shaped reinforcement 4031, and the circular hole on the rear end of the combination is assembled with the circular hole on the front end 403404, the groove is assembled with the rear ends of the rear-end U-shaped reinforcing steel bar 4042 and the rear-end U-shaped reinforcing steel bar 4042, in the embedding process, the connecting interfaces between the upper reinforcing steel frame 401, the lower reinforcing steel frame 402, the front-end reinforcing steel frame 403, the rear-end reinforcing steel frame 404 and the long wood unit 1 and between the first bamboo plywood 2 are bonded and fixed by structural adhesive to form a double connecting interface of mechanical interlocking connection of reinforcing steel bars and wood and complementary interface bonding, and after the installation is finished, the upper ends of the upper U-shaped reinforcing steel bars 4012 are respectively welded and fixed with the two upper longitudinal reinforcing steel bars 4011; the lower ends of the lower U-shaped reinforcing steel bars 4022 are welded and fixed with the two lower longitudinal reinforcing steel bars 4021 respectively; the upper ends of two front-end vertical steel bars 4031 are welded and fixed with the upper end of the foremost upper U-shaped steel bar 4012, the lower ends of the two front-end vertical steel bars 4031 are welded and fixed with the lower end of the foremost lower U-shaped steel bar 4022, the front ends of the plurality of front-end U-shaped steel bars 4032 are respectively welded and fixed with the two front-end vertical steel bars 4031, the uppermost front-end U-shaped steel bar 4032 in the plurality of front-end U-shaped steel bars 4032 is welded and fixed with the front ends of the two upper longitudinal steel bars 4011, and the lowermost front-end U-shaped steel bar 4032 in the plurality of front-end U-shaped steel bars 4032 is welded and fixed with the front ends of the two lower longitudinal steel bars 4021; the upper ends of two rear end vertical reinforcing bars 4041 are welded and fixed with the upper end of the last upper U-shaped reinforcing bar 4012, the lower ends of the two rear end vertical reinforcing bars 4041 are welded and fixed with the lower end of the last lower U-shaped reinforcing bar 4022, the rear ends of the plurality of rear end U-shaped reinforcing bars 4042 are welded and fixed with the two rear end vertical reinforcing bars 4041 respectively, the uppermost rear end U-shaped reinforcing bar 4042 of the plurality of rear end U-shaped reinforcing bars 4042 is welded and fixed with the rear ends of the two upper longitudinal reinforcing bars 4011, the lowermost rear end U-shaped reinforcing bar 4042 of the plurality of rear end U-shaped reinforcing bars 4042 is also welded and fixed with the rear ends of the two lower longitudinal reinforcing bars 4021, and an I-shaped beam base member is formed.

Manufacturing an I-shaped beam structure: fixing a second bamboo plywood 5 and a third bamboo plywood 6 on the upper surface and the lower surface of the I-shaped beam base part respectively, so as to form an I-shaped beam structure;

specifically, a fifth glue is coated on a connecting interface between the second bamboo plywood 5 and the I-shaped beam base part and a connecting interface between the third bamboo plywood 6 and the I-shaped beam base part, and then the third pin 10 fixes the second bamboo plywood 5 and the upper surface of the I-shaped beam base part and the third bamboo plywood 6 and the lower surface of the I-shaped beam base part to form a double connecting interface of the matching interface mechanical connection and the interface bonding complementation between the second bamboo plywood 5, the third bamboo plywood 6 and the I-shaped beam base part.

Installation of the ferrule 7: a plurality of cuffs 7 are sleeved on the outer peripheral surface of the I-shaped beam structure.

Specifically, the sixth glue is coated on the inner sides of the plurality of hoops 7, and then the plurality of hoops 7 are sleeved into and hoop the two ends of the I-beam structure from the two ends of the composite beam structure.

It should be noted that, the exposed parts of the small short wood, the second bamboo plywood 5 and the third bamboo plywood 6 of the combined I-beam 1000 are subjected to surface polishing and smoothing treatment, if color difference treatment is needed, the color difference treatment is performed, then, the exposed parts of the small short wood, the second bamboo plywood 5 and the third bamboo plywood 6 of the combined I-beam 1000 are coated with wood varnish, and the steel bars and the steel plates exposed at the two ends of the combined I-beam 1000 are coated with antirust paint.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. A composite I-beam, wherein the composite I-beam is a winged steel bar frame-staggered laminated small short wood-bamboo plywood composite I-beam, comprising:

the long wood unit comprises a left long wood unit and a right long wood unit, and the left long wood unit and the right long wood unit are both in a groove shape and are respectively formed by splicing and fixing a plurality of small short woods in a staggered and laminated manner;

The first bamboo plywood is positioned between the left long wood unit and the right long wood unit, and the left side surface of the first bamboo plywood and the right side surface of the left long wood unit as well as the right side surface of the first bamboo plywood and the left side surface of the right long wood unit are fixed by first glue, so that an I-shaped combination body is formed;

the outer peripheral surfaces of the first pins are coated with second glue and then penetrate and are embedded into the left long wood unit, the first bamboo plywood and the right long wood unit of the combination along the left-right direction;

the winged steel bar frame is approximately in an I shape in outline and comprises an upper steel bar frame, a lower steel bar frame, a front end steel bar frame and a rear end steel bar frame, wherein the upper steel bar frame is embedded in the upper surfaces of the left long wood unit, the first bamboo plywood and the right long wood unit of the combination, the front end and the rear end of the upper steel bar frame are bent downwards respectively to be embedded in the front end surfaces and the rear end surfaces of the left long wood unit and the right long wood unit of the combination correspondingly, the lower steel bar frame is embedded in the lower end surfaces of the left long wood unit, the first bamboo plywood and the right long wood unit of the combination, the front end and the rear end of the lower steel bar frame are bent upwards respectively to be correspondingly embedded in the front end surfaces and the rear end surfaces of the left long wood unit and the right long wood unit of the combination, and the front end frame is embedded in the left long wood unit of the combination, The front end surfaces of the first bamboo plywood and the right long wood unit are welded and fixed with the front ends of the upper steel bar frame and the lower steel bar frame, the rear steel bar frame is embedded in the rear end surfaces of the left long wood unit, the first bamboo plywood and the right long wood unit of the combined body and is welded and fixed with the rear end of the upper steel bar frame and the rear end of the lower steel bar frame, and the connection interfaces between the winged steel bar frame and the long wood unit and between the first bamboo plywood are fixed by adopting third glue bonding, so that the I-beam base member is formed;

The second bamboo plywood and the third bamboo plywood are respectively and correspondingly fixed on the upper surface and the lower surface of the I-shaped beam base part, so that an I-shaped beam structure is formed;

the hoop structures are arranged on the outer peripheral surface of the I-shaped beam structure in a sleeved mode, and the hoop structures are arranged on the outer peripheral surface of the I-shaped beam structure in a sleeved mode.

2. The composite i-beam of claim 1, wherein the first pin is an elongated cylindrical bamboo pin.

3. The composite I-beam according to claim 1, wherein two adjacent small short wood units in the left long wood unit and two adjacent small end wood units in the right long wood unit are fixedly connected by a second pin or dovetail groove connecting piece, and a fourth glue is fixedly bonded between a connecting interface between two adjacent small short wood units in the left long wood unit and a connecting interface between two adjacent small end wood units in the right long wood unit.

4. The composite i-beam of claim 3, wherein the left longwood cell comprises a first web assembly, a first upper wing plate assembly, and a first lower wing plate assembly, and the right longwood cell comprises a second web assembly, a second upper wing plate assembly, and a second lower wing plate assembly; the first web plate component is formed by staggered and laminated arrangement of three or more layers of a part of the small short woods in the left long wood unit, the first upper wing plate component is formed by fixing the other part of the small short woods in the left long wood unit in a pairwise front-back adjacent arrangement mode, the first lower wing plate component is formed by fixing the other part of the small short woods in the left long wood unit in a pairwise front-back adjacent arrangement mode, and the first upper wing plate component and the first lower wing plate component are respectively and correspondingly fixed on the left side of the uppermost layer and the left side of the lowest layer of the first web plate component; the second web plate component is formed by staggered lamination of a plurality of small short wood in the long wood unit on the right side and a part of the small short wood in three layers or more than three layers, the second upper wing plate component is formed by fixing the small short wood in a pairwise front-back adjacent arrangement mode, the second lower wing plate component is formed by fixing the other parts of the small short wood in the long wood unit on the right side in a pairwise front-back adjacent arrangement mode, and the second upper wing plate component and the second lower wing plate component are correspondingly fixed on the right side of the uppermost layer and the right side of the lowermost layer of the second web plate component respectively.

5. The composite i-beam as in claim 4, wherein the materials of the minor jogs of different layers within the left and right longwood units are the same or different.

6. The composite i-beam as defined in claim 5, wherein said upper and lower short wood units in said left and right long wood units are processed using high strength hardwood, and said middle short wood units in said left and right long wood units are processed using low strength softwood.

7. The composite i-beam of claim 3, wherein the second pin is a first short cylindrical bamboo pin.

8. The composite i-beam of claim 1, wherein the winged reinforcement cage is formed of rebar.

9. The composite i-beam of claim 1,

the upper steel bar frame comprises two upper longitudinal steel bars and at least one upper U-shaped steel bar, the two upper longitudinal steel bars are relatively spaced in the left-right direction and extend in the front-back direction, the front ends and the rear ends of the two upper longitudinal steel bars are respectively bent downwards to form upper bending sections, the upper U-shaped steel bars are arranged in a mode that openings are downward, and the upper ends of the upper U-shaped steel bars are respectively welded and fixed with the two upper longitudinal steel bars;

The lower steel bar frame comprises two lower longitudinal steel bars and at least one lower U-shaped steel bar, the two lower longitudinal steel bars are spaced in the left-right direction and extend in the front-back direction, the front ends and the rear ends of the two lower longitudinal steel bars are bent upwards respectively to form lower bending sections, the lower U-shaped steel bars are arranged with openings facing upwards, and the lower ends of the lower U-shaped steel bars are welded and fixed with the two lower longitudinal steel bars respectively;

the front-end reinforcing steel bar frame comprises two front-end vertical reinforcing steel bars and a plurality of front-end U-shaped reinforcing steel bars, the two front-end vertical reinforcing steel bars are oppositely spaced in the left-right direction, the upper ends of the two front-end vertical reinforcing steel bars are bent backwards and welded and fixed with the upper end of the foremost upper U-shaped reinforcing steel bar, the lower ends of the two front-end vertical reinforcing steel bars are bent backwards and welded and fixed with the lower end of the foremost lower U-shaped reinforcing steel bar, the plurality of front-end U-shaped reinforcing steel bars are arranged with openings facing backwards, the front ends of the plurality of front-end U-shaped reinforcing steel bars are welded and fixed with the two front-end vertical reinforcing steel bars respectively, the topmost one of the plurality of front-end U-shaped reinforcing steel bars is welded and fixed with the front ends of the two upper longitudinal reinforcing steel bars, and the bottommost one of the plurality of front-end U-shaped reinforcing steel bars is welded and fixed with the front ends of the two lower longitudinal reinforcing steel bars;

The rear end reinforcing steel bar frame comprises two rear end vertical reinforcing steel bars and a plurality of rear end U-shaped reinforcing steel bars, the two rear end vertical reinforcing steel bars are spaced relatively in the left-right direction, the two upper ends of the rear end vertical reinforcing steel bars are bent forwards and are welded and fixed with the last upper end of the upper U-shaped reinforcing steel bar, the two lower ends of the rear end vertical reinforcing steel bars are bent forwards and are welded and fixed with the last lower end of the lower U-shaped reinforcing steel bar, the plurality of rear end U-shaped reinforcing steel bars are arranged with openings forwards, the plurality of rear ends of the rear end U-shaped reinforcing steel bars are welded and fixed with the two rear ends of the upper longitudinal reinforcing steel bar respectively, the uppermost one of the plurality of rear end U-shaped reinforcing steel bars is welded and fixed with the two rear ends of the lower longitudinal reinforcing steel bar, and the lowermost one of the plurality of rear end U-shaped reinforcing steel bars is welded and fixed with the two rear ends of the lower longitudinal reinforcing steel bar.

10. The composite i-beam of claim 1, wherein the second bamboo plywood and the upper surface of the i-beam base member and the third bamboo plywood and the lower surface of the i-beam base member are secured together by third pins, and wherein the interface between the second bamboo plywood and the upper surface of the i-beam base member and the interface between the third bamboo plywood and the lower surface of the i-beam base member are secured together by a fifth glue.

11. The composite i-beam of claim 10, wherein the third pin is a second short cylindrical bamboo pin.

12. The composite i-beam of claim 1, wherein the ferrule is an i-shaped galvanized steel ferrule, and a connection interface between the ferrule and the i-beam structure is secured by a sixth glue bond.

13. A method of making a composite i-beam according to any one of claims 1 to 12, comprising the steps of:

manufacturing the left long wood unit and the right long wood unit: the left long wood unit and the right long wood unit are respectively formed by staggering, laminating and assembling a plurality of small short woods;

manufacturing the assembly: the left side surface of the first bamboo plywood and the right side surface of the left long wood unit and the right side surface of the first bamboo plywood and the left side surface of the right long wood unit are respectively bonded and fixed by the first glue, so that the combined body is formed;

installing the first pin: drilling a plurality of through holes penetrating through the left long wood unit, the first bamboo plywood and the right long wood unit of the combination body along the left-right direction at different positions of the combination body by using an electric drill, respectively coating second glue on the peripheral surfaces of the first pins, and then respectively embedding the first pins into the through holes in a one-to-one corresponding penetrating manner;

Processing groove-shaped mounting parts matched with the structural outline of the winged steel bar frame on the upper surface, the lower surface, the front end surface and the rear end surface of the combined body;

manufacturing the winged steel bar frame: separately manufacturing the upper reinforcement frame, the lower reinforcement frame, the front-end reinforcement frame, and the rear-end reinforcement frame;

manufacturing the I-shaped beam base piece: coating the third glue on the front-end steel bar frame, the rear-end steel bar frame, the upper steel bar frame and the lower steel bar frame, then respectively embedding the front-end steel bar frame, the rear-end steel bar frame, the upper steel bar frame and the lower steel bar frame into corresponding positions of the groove-shaped installation part in a matched manner, correspondingly welding and fixing the upper end and the lower end of the front-end steel bar frame with the front end of the upper steel bar frame and the front end of the lower steel bar frame, and correspondingly welding and fixing the upper end and the lower end of the rear-end steel bar frame with the rear end of the upper steel bar frame and the rear end of the lower steel bar frame, so that the I-shaped beam base member is formed;

manufacturing the I-shaped beam structure: fixing the second bamboo plywood and the third bamboo plywood on the upper surface and the lower surface of the I-shaped beam base part respectively and correspondingly so as to form the I-shaped beam structure;

installing the hoop: and sleeving a plurality of cuffs on the outer peripheral surface of the I-shaped beam structure.

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