WO2022193405A1

WO2022193405A1 - Beam-column connection joint in inorganic adhesive composite bamboo-wood structure, and framework structure and method

Info

Publication number: WO2022193405A1
Application number: PCT/CN2021/089382
Authority: WO
Inventors: 贾强; 张鑫; 刘巧玲; 李树明
Original assignee: 山东建筑大学; 山东建大工程鉴定加固研究院; 山东建固特种专业工程有限公司
Priority date: 2021-03-19
Filing date: 2021-04-23
Publication date: 2022-09-22
Also published as: CN113006279B; CN113006279A

Abstract

Disclosed are a beam-column connection joint in an inorganic adhesive composite bamboo-wood structure, and a framework structure and a method. The connection joint comprises a connection joint between columns, a connection joint between a column and a beam, and a connection joint between beams. The connection joint between columns comprises a first steel sleeve disposed in a first column, wherein a connection steel bar is welded to a side face of the first steel sleeve, and the connection steel bar extends into a second column. The connection joint between a column and a beam comprises a second steel sleeve and a third steel sleeve, which are disposed in the column, wherein connection steel bars are welded to side faces of both the second steel sleeve and the third steel sleeve. When the connection steel bar located above extends to a lower end face of the beam, same is bent and inserted into the beam; and when the connection steel bar located below extends to an upper end face of the beam, same is bent and inserted into the beam. The connection joint between beams is located in the span of the beams. By means of the connection joint, an anchoring connection between beam and column joints is achieved by using a small number of steel bars, and the defect of a bamboo-wood material being not suitable for bending is overcome.

Description

Connection node, frame structure and method between beams and columns in inorganic glue composite bamboo-wood structure

technical field

The invention relates to the field of inorganic glue composite bamboo and wood construction, in particular to an inorganic glue composite bamboo wood structure beam-column joint, a composite bamboo wood frame structure and a connection method.

Background technique

Bamboo and wood are unique green materials that can grow naturally and are environmentally friendly in line with sustainable development. Compared with wood, bamboo can be used as a material after 4 years of growth, and its strength is also higher than that of wood. When the domestic construction wood has been cut down, the utilization of bamboo is more important. It should also be emphasized that bamboo buildings have very good seismic resistance due to their light weight and high strength. my country is the most important bamboo-producing region in the world. The bamboo forest area is nearly 1/3 of the world's, with more than 7 million hectares. The annual output value of the bamboo industry is more than 200 billion yuan, and the number of employees is nearly 8 million. The volume and output are the highest in the world. Through intensive management, each hectare of bamboo forest can absorb 46 tons of carbon dioxide per year.

The traditional construction industry mainly uses steel bars, concrete and clay bricks as materials. The preparation of these materials not only consumes a lot of non-renewable resources such as sand, stone, and clay, but also consumes a lot of energy and emits carbon dioxide.

In the existing patents ZL202010239326.5, ZL202010239335.4, etc., it is proposed to use magnesium oxide, magnesium sulfate heptahydrate, silica fume, silica sol, lithium silicate, sodium silicate, citric acid, microcrystalline cellulose, nanocellulose whiskers , A method for preparing bamboo and wood from inorganic glue produced by components such as amino trimethylene phosphonic acid and water. However, the properties of beams, columns and other components produced by these materials are different from traditional bamboo and wood components, and also different from reinforced concrete components. How to realize the connection of these components to form a complete structural system is an urgent problem to be solved.

SUMMARY OF THE INVENTION

In view of the technical problems existing in the prior art, the present invention proposes a bamboo-wood beam-column member prepared by inorganic glue, and specifically, proposes a connection node, frame structure and connection method between beams and columns in an inorganic glue-composite bamboo-wood structure .

The technical scheme adopted in the present invention is as follows:

In a first aspect, the present invention provides a connection node between beams and columns in an inorganic glue composite bamboo-wood structure, including a connection node between a column and a column, a connection node between a column and a beam, and a connection node between the beam and the beam. ;

The connecting node between the columns includes a first steel sleeve arranged in the first column, the side of the first steel sleeve is welded with connecting bars, and the connecting bars extend into the second column;

The connection node between the column and the beam includes a second steel sleeve and a third steel sleeve arranged in the column, and the side surfaces of the second steel sleeve and the third steel sleeve are welded with connecting bars , when the connecting bar located above extends to the lower end face of the beam, the bending is inserted into the beam; when the connecting reinforcing bar located below extends to the upper end face of the beam, the bending is inserted into the beam;

The connecting nodes between the beams are located at the midspan of the beams.

As a further technical solution, the connection nodes between the beams include a vertical boss on the first beam, a vertical groove on the second beam, and the vertical boss and the vertical groove mated and connected by horizontal connecting pins.

As a further technical solution, a pre-embedded steel plate is provided on the front and rear surfaces of the connection between the first beam and the second beam; The steel plate is welded by the outer steel plate, and the two pre-embedded steel plates at the back are welded by the outer steel plate.

As a further technical solution, a pre-embedded steel plate is provided on the front and rear or/and the left and right surfaces of the first column and the second column; the pre-embedded steel plate is parallel to the surfaces of the first column and the second column, and is located in front , The two embedded steel plates on the back, left or/and right are welded by the corresponding outer steel plates.

As a further technical solution, the end of the second column is provided with a reserved hole, and inorganic glue is injected between the connecting steel bar and the reserved hole.

As a further technical solution, the first steel sleeve, the second steel sleeve and the third steel sleeve are square or round steel sleeves.

In a second aspect, the present invention also provides a composite bamboo-wood frame structure, which includes the aforementioned connecting nodes.

In a third aspect, the present invention also provides a method for assembling a composite bamboo-wood frame structure, comprising the following steps:

1) Prefabricate the columns and beams in advance;

2) When installing the first section of the column, insert the steel bar reserved at the top of the foundation into the reserved hole at the bottom of the column, and inject inorganic glue into the reserved hole before inserting; Cover the embedded steel plate on the outside, and weld it with the surrounding area of the embedded steel plate; install the other columns, insert the reserved steel bars on the top of the lower column into the reserved holes of the upper column, and the other steps are the same as those of the first section. the same column;

(3) When the joints of the beams are connected, the vertical protrusions of the first beam are aligned with the horizontal pin holes of the vertical grooves of the second beam; at the same time, pins are inserted into the horizontal pin holes to temporarily fix the beams and columns; after the beam is corrected, Cover the embedded steel plate on the beam with the outer steel plate on the outside, and weld it together with the surrounding of the embedded steel plate.

Compared with the prior art, the advantages and positive effects of the present application are:

The invention provides a connection node of a bamboo-wood beam and a column member prepared by inorganic glue, a frame structure formed by the connection node, and an assembling method. In this connection node, a small amount of steel bars are used to realize the anchoring connection of beam and column nodes, which overcomes the disadvantage that bamboo and wood materials are not suitable for bending. The steel sleeve has a good constraining effect on the bamboo and wood materials, which further improves the compressive strength of the components, and is the fixing point for the anchoring steel bars. The vertical protrusions and vertical groove joints between the beams enable the components to have a better vertical degree of freedom when they are hoisted in place, and enable the connecting bars between the columns to be inserted into the reserved holes smoothly. After the horizontal pins are inserted at the beam joints, a stable temporary structural system is formed, and the crane can be decoupled to hoist other components, which improves the work efficiency. After the outer steel plate is welded, a fixed end connection is formed at the joint, which can smoothly transmit various effects such as bending moment, shear force, and axial force.

Description of drawings

The accompanying drawings that form a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute improper limitations on the present application.

Figure 1 is a perspective view of the connection of beam and column member nodes;

Figure 2 is a side view after the beam and column members are connected;

Figure 3 is a side view of the upper and lower connection of the column (the schematic diagram of the embedded part and the outer steel plate in the direction of the connecting beam);

Figure 4 is a side view of the upper and lower connection of the column (the schematic diagram of the embedded parts and the outer steel plate in the direction of the frame beam);

Among them, 1, column, 2, beam, 3, steel sleeve, 4, connecting and anchoring steel bar, 5, vertical boss, 6, vertical groove, 7, horizontal pin hole, 8, embedded steel plate, 9, Anchor bar, 10. Outsourcing steel plate, 11. Surrounding welding seam, 12. Connecting steel bar, 13. Reserved hole.

Detailed ways

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the invention clearly dictates otherwise, the singular is intended to include the plural as well, and it is also to be understood that when the terms "comprising" and/or "including" are used in this specification, Indicate the presence of features, steps, operations, devices, components and/or combinations thereof;

In this embodiment, a new connection node and a specific connection method of the beam-column member are proposed for the bamboo-wood beam and column members prepared by inorganic glue. After each node and the corresponding beam and column are connected together, a frame structure system can be formed. The bamboo and wood materials in this embodiment are renewable materials, which have very good tensile and compressive strengths in beams and columns, and can replace steel bars in traditional reinforced concrete components. Inorganic glue glues bamboo and wood materials together, which has very good fire resistance, corrosion resistance and insect-eaten effect.

The connection nodes between beams and columns in the inorganic glue composite bamboo-wood structure proposed in this embodiment, as shown in Figure 1, Figure 2, Figure 3, Figure 4, include connection nodes between columns and columns, and connections between columns and beams. Connecting nodes, connecting nodes between beams; in the entire frame structure, columns and columns are connected through the connecting nodes disclosed in this embodiment, and beams and columns are connected through the connecting nodes disclosed in this embodiment, The beams are connected through the connection nodes disclosed in this embodiment.

The connection node between the column and the column is shown in Figure 3 and Figure 4, including a steel sleeve 3 arranged in the lower column, the side of the steel sleeve 3 is welded with a connecting steel bar 12, and the connecting steel bar 12 extends into the upper column; The bottom of the column is provided with a reinforcing bar channel; the connecting steel bar 12 is inserted into the reinforcing bar channel. It should be noted that the connecting steel bars on each side can be one or more, which can be set according to actual needs; and the connecting steel bars 12 can be welded on four or three sides, or only two opposite steel bars can be connected. The side of the steel bar 12 is welded and connected, and it is set according to actual needs.

Further, a pre-embedded steel plate 16 is provided on the front and rear or/and on the left and right surfaces of the upper column and the lower column; Or/and the two pre-embedded steel plates 16 on the right are welded by corresponding outer steel plates 17 . In this embodiment, only the pre-embedded steel plates 16 are provided on the front and rear surfaces; a total of four pre-embedded steel plates are provided, of course, it is not difficult to understand, in other embodiments, the left and right surfaces, or the left and right front and rear surfaces are set.

The connection node between the column and the beam is shown in Figure 1, including two steel sleeves 3 arranged in the column; the sides of the two steel sleeves 3 are welded with connecting steel bars, and the connecting steel bars located above extend to the lower part of the beam. When the end face, the bending is inserted into the beam; when the connecting bar located below extends to the upper end face of the beam, the bending is inserted into the beam;

The connection node between the beam and the beam is shown in Figure 1, which is located in the middle of the beam, and the connection node between the beam and the beam includes a vertical boss 5 located on the first beam, and a vertical boss 5 located on the second beam. The vertical groove 6, the vertical boss 5 and the vertical groove 6 are matched and connected by a horizontal connecting pin. A pre-embedded steel plate 8 is provided on the front and rear surfaces of the connection of the beams (that is, a pre-embedded steel plate 8 is provided on the front and rear surfaces of the first beam, and a pre-embedded steel plate 8 is provided on the front and rear surfaces of the second beam) The embedded steel plate 8 is parallel to the surface of the first beam and the second beam, and the two embedded steel plates 8 in front of the two beams are welded by the outer steel plate 10, and the two embedded steel plates at the back of the two beams are welded by the outer steel plate 10 Welding.

Further, the present embodiment also provides a method for manufacturing the above-mentioned connecting nodes between beams and columns, and the specific steps are as follows:

1. Component production

(1) Since the beam-column member can only be produced in the factory at this stage and assembled on the construction site. Considering the process requirements of component transportation, hoisting, and assembly, in order to reduce vertical joints during the preparation of column components, usually two to three-story columns are produced as a standard section; in order to reduce the joints between columns and beams, columns and half The span beam is made as a whole, and the joint of the beam is set at the mid-span of the beam.

(2) A steel sleeve 3 is set up and down in the column 1 and near the end of the beam; further, a steel sleeve 3 is also provided at the position close to the connection between the column and the column; In the steel sleeve 3 , it is evenly dispersed along the periphery of the steel sleeve 3 . In addition, the connecting reinforcing bars at the column joints and the ends of the anchoring reinforcing bars 4 between the beams and the columns should be welded on the steel sleeve 3 . The role of the steel sleeve 3 not only constrains the bamboo bars and wood strips to improve their compressive bearing capacity, but also the steel sleeve 3 at the upper and lower ends of the beam 2 may bear a certain shear force and improve the anchoring performance of the anchoring steel bar. The steel sleeve 3 may be a square sleeve or a circular sleeve. In this embodiment, a square sleeve is disclosed.

(3) Vertical connecting steel bars are arranged at the joints of the columns. The lower part of the steel bars is pre-buried in the lower column and welded on the side of the steel sleeve; the bottom of the upper column needs to be reserved for the corresponding position and depth. When connecting, insert it into the steel bar hole. Specifically, as shown in Figure 4, a steel sleeve is preset on the upper part of the lower column. At least one steel bar is welded on the front, rear, left, right, and four sides of the steel sleeve. The lower part is provided with reinforced holes;

(4) Anchor steel bars are arranged between beams and columns. In this embodiment, as shown in FIG. 1 , two steel sleeves are arranged up and down in the middle position of the right column, and at least one vertical steel bar is welded to the two opposite sides of the lower steel sleeve. When the steel bar is extended to the top surface near the beam 2-1, it is bent and extended into the beam 2-1 for a certain anchoring length; at least one vertical steel bar is welded on each of the two opposite sides of the upper steel sleeve, When the vertical steel bar extends to the bottom surface of the beam 2-1, it is bent and extended into the beam 2-1 for a certain anchoring length; similarly, the left column and the beam 2-2 are connected in exactly the same way.

(5) At the mid-span joint of the beam, the end of one beam is made into a vertical convex head, and the end of the other beam is made into a vertical groove, and the sides of the vertical convex head and the vertical groove are set horizontally. Pin holes, and the thickness of the vertical protrusion is slightly smaller than the width of the vertical groove, so that it can be inserted smoothly during installation. In this embodiment, a vertical groove 6 is provided at the end of the beam 2-1, and a vertical protrusion 5 is provided at the end of the beam 2-2, and the vertical protrusion 5 is inserted into the vertical recess. In the groove 6 , horizontal pin holes are provided on both the vertical protrusion 5 and the vertical groove 6 .

(6) Pre-embed a steel plate on the four sides of the joint at both ends of the column and on the two vertical sides of the joint at both ends of the beam, and the outer surface of the embedded steel plate is flush with the surface of the component, and the top surface of the foundation also needs to be on the four sides. Pre-embedded steel plate for connection with the bottom column. Horizontal pin holes should also be reserved for the embedded steel plates on the side of the beam with vertical grooves.

In this embodiment, as shown in FIG. 1 , a pre-embedded steel plate 8 is provided on the front and rear sides of the beam 2-1 and the beam 2-2. The embedded steel plate 8 is connected to the beam 2-1 and the beam through the anchor bars. 2-2 are connected; the outer surface of the embedded steel plate is flush with the surface of beam 2-1 and beam 2-2; as shown in Figure 3, there is an embedded steel plate on the front and rear sides of the joint of the upper and lower columns 14. The embedded steel plate 14 is connected with the corresponding upper and lower columns through anchor bars; the outer surface of the embedded steel plate is flush with the surfaces of the upper and lower columns.

2. Structural installation

(1) When installing the first column, insert the steel bar reserved at the top of the foundation into the reserved hole at the bottom of the column, and inject inorganic glue into the reserved hole before insertion. After the plane position and verticality of the column are corrected, cover the embedded steel plate with the outer steel plate on the outside, and weld it together with the surrounding of the embedded steel plate. For the installation of other columns, insert the steel bars reserved at the top of the lower column into the reserved holes of the upper column, and the other steps are the same as those of the first column.

(2) When the joints of the beams are connected, the vertical protrusion of one side beam is aligned with the horizontal pin hole of the vertical groove of the other side beam. At the same time, pins are inserted into the horizontal pin holes to temporarily fix the beams and columns, creating conditions for subsequent correction and welding of outsourcing steel plates.

(3) After the beam is calibrated, cover the embedded steel plate with the outer steel plate on the outside, and weld it with the surrounding of the embedded steel plate.

(4) After the installation of beams and columns is completed, follow-up work such as floor installation is carried out.

In this connection node, a small amount of steel bars are used to realize the anchor connection of beam and column nodes, which overcomes the disadvantage that bamboo and wood materials are not suitable for bending. The steel sleeve has a good constraining effect on the bamboo and wood materials, which further improves the compressive strength of the components, and is the fixing point for the anchoring steel bars. The vertical protrusions and vertical groove joints between the beams enable the components to have a better vertical degree of freedom when they are hoisted in place, and enable the connecting bars between the columns to be inserted into the reserved holes smoothly. After the horizontal pins are inserted at the beam joints, a stable temporary structural system is formed, and the crane can be decoupled to hoist other components, which improves the work efficiency. After the outer steel plate is welded, a fixed end connection is formed at the joint, which can smoothly transmit various effects such as bending moment, shear force, and axial force.

Claims

The connection node between beams and columns in the inorganic glue composite bamboo-wood structure is characterized in that it includes the connection node between the column and the column, the connection node between the column and the beam, and the connection node between the beam and the beam;

The connecting node between the columns includes a first steel sleeve arranged in the first column, the side of the first steel sleeve is welded with connecting bars, and the connecting bars extend into the second column;

The connection node between the column and the beam includes a second steel sleeve and a third steel sleeve arranged in the column, and the side surfaces of the second steel sleeve and the third steel sleeve are welded with connecting bars , when the connecting bar located above extends to the lower end face of the beam, the bending is inserted into the beam; when the connecting reinforcing bar located below extends to the upper end face of the beam, the bending is inserted into the beam;

The connecting nodes between the beams are located at the midspan of the beams.
The connection node between beams and columns in the inorganic glue composite bamboo-wood structure according to claim 1, wherein the connection node between the beams comprises a vertical boss located on the first beam, a vertical boss located on the second beam The vertical grooves on the beams are matched with the vertical protrusions and the vertical grooves and are connected by horizontal connecting pins.
The connection node between beams and columns in the inorganic glue composite bamboo-wood structure according to claim 2, wherein a pre-embedded steel plate is arranged on the front and rear surfaces of the connection between the first beam and the second beam; The surfaces of the first beam and the second beam are parallel, and the two pre-embedded steel plates located in the front are welded by the outer-coated steel plates, and the two pre-embedded steel plates located at the back are welded by the outer-coated steel plates.
The connection node between beams and columns in the inorganic glue composite bamboo-wood structure as claimed in claim 1, wherein a pre-embedded steel plate is arranged on the front and rear or/and the left and right surfaces of the first column and the second column connection; The pre-embedded steel plates are parallel to the surfaces of the first column and the second column, and the two pre-embedded steel plates located at the front, rear, left or/and right are welded by corresponding outer steel plates.
The connection node between beams and columns in the inorganic glue composite bamboo-wood structure as claimed in claim 1, wherein the end of the second column is provided with a reserved hole, and inorganic filler is injected between the connecting steel bar and the reserved hole. glue.
The connection node between beams and columns in the inorganic glue composite bamboo-wood structure according to claim 1, wherein the first steel sleeve, the second steel sleeve and the third steel sleeve are square or round steel sleeves.
The connection node between beams and columns in the inorganic glue composite bamboo-wood structure according to claim 1, wherein the bamboo bars and wood strips are hooped in the steel sleeve of the column and evenly dispersed along the periphery of the steel sleeve.
A composite bamboo-wood frame structure, characterized in that it comprises the connecting node described in any one of claims 1-7.
A method of assembling a composite bamboo-wood frame structure as claimed in claim 8, characterized in that, comprising the following steps:

1) Prefabricate the columns and beams in advance;

2) When installing the first section of the column, insert the steel bar reserved at the top of the foundation into the reserved hole at the bottom of the column, and inject inorganic glue into the reserved hole before inserting; Cover the embedded steel plate on the outside, and weld it with the surrounding area of the embedded steel plate; install the other columns, insert the reserved steel bars on the top of the lower column into the reserved holes of the upper column, and the other steps are the same as those of the first section. the same column;

(3) When the joints of the beams are connected, the vertical protrusions of the first beam are aligned with the horizontal pin holes of the vertical grooves of the second beam; at the same time, pins are inserted into the horizontal pin holes to temporarily fix the beams and columns; after the beam is corrected, Cover the embedded steel plate on the beam with the outer steel plate on the outside, and weld it together with the surrounding of the embedded steel plate.