CN112832456A - Prestress applying device and applying method for reinforced laminated wood beam - Google Patents
Prestress applying device and applying method for reinforced laminated wood beam Download PDFInfo
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- 239000002023 wood Substances 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000012779 reinforcing material Substances 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000003292 glue Substances 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 91
- 239000010959 steel Substances 0.000 claims description 91
- 230000002787 reinforcement Effects 0.000 claims description 29
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- 239000000463 material Substances 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 6
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- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
- E04C3/18—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with metal or other reinforcements or tensioning members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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Abstract
The invention relates to a prestress applying device and a prestress applying method for a reinforced glued wood beam, wherein the applying device comprises a transverse pressurizing device and a longitudinal pressurizing device, the longitudinal pressurizing device is matched with the transverse pressurizing device for use, the longitudinal pressurizing device enables the wood beam to apply prestress in vitro without damaging the integrity of a section, and the transverse pressurizing device enables a reinforcing material and the wood beam to be compressed to ensure the pasting quality; the prestress applying device has small volume and convenient operation, can combine the processes of adhering the reinforcing material and applying the prestress without damaging the integrity of the section, thereby reducing the section height of the laminated wood beam, saving the material, facilitating the construction and widening the application range of the laminated wood beam. The problems of poor common working performance of the wood beam and the reinforced material, inaccurate local glue opening, inaccurate prestress application and the like are solved, and the manufacturing quality of the prestress reinforced beam is ensured.
Description
Technical Field
The invention relates to the technical field of wood structures in civil engineering, in particular to a prestress applying device and a prestress applying method for a reinforced glued wood beam.
Background
Laminated wood is generally formed by arranging and assembling wood veneers, veneer strips or wood sheets and the like along the length direction of a member, and laminating and gluing the wood veneers, the veneer strips or the wood sheets by using structural adhesives, and is a main material of modern wood structures. The laminated wood structure has the advantages of renewable materials, environmental protection, reliable stress, good anti-seismic performance, high industrialization degree, short construction period, moisture resistance, corrosion resistance, sound insulation, noise prevention, good fire resistance and the like, and is widely applied in countries such as Europe and America. In recent years, in order to save energy, protect environment and develop sustainably, China also popularizes green buildings vigorously, and the green buildings comprise modern wood structure buildings.
Compared with natural wood such as raw wood, square wood and the like, the laminated wood has the advantages of no restriction on section form and size, high strength, good durability, industrial production and the like, and is widely applied as a main bending member in a structure. However, the traditional laminated wood beam also has certain disadvantages, for example, the elastic modulus of the laminated wood is relatively low, the deformation is large, and the long-term deflection of the laminated wood beam is further increased due to creep deformation, so that the use is influenced; the laminated wood beam is subjected to brittle failure when being bent, and the compression performance of the laminated wood is not fully exerted when the laminated wood beam is broken.
The externally bonded reinforced material (steel plate, fiber cloth, fiber plate, etc.) is a simple and easy method for reinforcing the glued wood beam, and the method usually bonds a material with higher strength in the tension area of the beam bottom, thereby improving the tension performance of the glued wood. However, because the difference between the elastic modulus of the reinforcing material and the elasticity modulus of the laminated wood is large, when the laminated wood is damaged in tension, the reinforcing material far does not reach the tensile strength, which is waste of the reinforcing material on one hand and limits the reinforcing effect on the other hand.
The laminated wood beam externally adhered with the reinforced material is prestressed, and the compression resistance of the laminated wood and the tensile resistance of the reinforced material can be fully utilized, so that the stress state of the beam is improved, the span of the beam is increased, and the application range of the traditional laminated wood beam is expanded.
Most of the existing research and application methods for applying prestress are stretching reinforcing materials. The method is easy to realize for materials such as steel bars, steel strands and the like, but for sheets such as steel plates, fiber cloth or fiber plates and the like, the traditional prestress applying method has limitation because the anchoring is relatively difficult and the fiber materials are brittle and easy to break. Therefore, how to provide a prestress applying device for reinforcing a laminated wood beam is a problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
Therefore, one object of the present invention is to provide a prestress applying device for reinforcing a laminated wood beam, which can apply a prestress between the laminated wood beam and a reinforcing material.
The invention provides a prestress applying device for a reinforced laminated wood beam, which comprises: a transverse pressurizing device and a longitudinal pressurizing device;
the transverse pressurizing device comprises: the first channel steel, the second channel steel, the first screw and the first nut; the first channel steel is rectangular, and the notch is arranged downwards; the second channel steel and the first channel steel are the same in length, parallel and arranged at a certain distance, and the notches of the second channel steel and the first channel steel are arranged oppositely; two first screws symmetrically penetrate through two ends of the second channel steel and two ends of the first channel steel, a transverse pressurizing area is formed in the middle area formed by the penetrating first screws, and the first screws are screwed and pressurized through first nuts connected to the first screws;
the longitudinal pressurizing device comprises: the steel base plate, the prestressed reinforcement and the second nut; two steel backing plates are fixed at two ends of the wood beam, each steel backing plate is provided with two through holes, the two through holes are respectively positioned at two sides of the beam body of the wood beam, two prestressed reinforcements correspondingly penetrate through the through holes on the two steel backing plates one by one, and two ends of each prestressed reinforcement are screwed and pressed through second nuts;
the wood beam is provided with a longitudinal pressurizing device for pressurizing, then is bonded with a reinforcing material, and is placed in a transverse pressurizing area for pressurizing.
According to the technical scheme, compared with the prior art, the prestress applying device for the reinforced glued wood beam is disclosed, the prestress of the wood beam is applied firstly, then the reinforcing material is bonded, and finally the wood beam and the reinforcing material are placed in the transverse pressurizing area for pressurizing, so that the problems that the reinforcing material cannot be fully utilized, the prestress application is not accurate enough, the manufacturing quality of the prestress reinforcing beam is not good and the like when the glued wood beam is reinforced by the externally bonded reinforcing material are solved.
Further, the top of the wood beam and the bottom of the reinforcing material are both provided with short steel plates. The short steel plate is placed locally by pressurizing, so that the local pressure is prevented from being generated.
Further, the width of the short steel plate is larger than the width value of the second channel steel, and the width of the short steel plate is larger than the width value of the first channel steel; thereby preventing the wooden beams and the reinforcing material from being subjected to local pressure.
Another object of the present invention is to provide a prestress applying method of a reinforced laminated wood beam, comprising the steps of: s1, firstly, installing a longitudinal pressurizing device on the wood beam, fixing a longitudinally pressurized strain gauge on the prestressed reinforcement, performing prestress pressurization, observing and recording data of the longitudinally pressurized strain gauge to a preset value; s2, removing ash and glue on the surface of the prestressed wood beam, and bonding a reinforcing material; and S3, inserting a plurality of transverse pressurizing areas corresponding to the transverse pressurizing devices along the length direction of the wood beam, arranging transverse pressurizing strain gauges on first screws of the transverse pressurizing devices at intervals, pressurizing at intervals, observing and recording the data of the transverse pressurizing strain gauges to preset values.
According to the technical scheme, compared with the prior art, the prestress applying method for the reinforced laminated wood beam is convenient to pressurize, and real-time monitoring and pressure adjustment can be realized by adhering the strain gauges to the first screw and the prestressed reinforcement.
S1, installing a longitudinal pressurizing device, namely, firstly placing steel base plates at two ends of a beam body of the wood beam, then penetrating prestressed reinforcements with proper diameters through holes formed in the steel base plates, wherein the end parts of the prestressed reinforcements are provided with threads, and the position of the longitudinal pressurizing device can be fixed by screwing second nuts at the end parts; pasting a strain gauge at the mid-span position of the prestressed reinforcement to obtain the change conditions of stress, strain and deflection of the glued wood beam; and connecting the measuring point with the strain box, and screwing the second screw cap at the end part by using a wrench until the numerical value on the prestressed reinforcement reaches the preset prestress, wherein the data on the prestressed reinforcement measuring point is changed by screwing the adjacent prestressed reinforcement in the process, so that the two ends are required to be screwed at intervals.
S3, a transverse pressurizing device is installed, a group of first channel steel, second channel steel, a first screw and a first nut are arranged at intervals, the second channel steel is held by two persons, the bottom of the first screw is fixed on the second channel steel, the top of the first screw penetrates through a reserved hole of the first channel steel, and the first nut connected to the top of the first screw is screwed, so that the first channel steel and the second channel steel are fixed and do not fall; but can not be screwed in advance so as to avoid the error caused by the pressure to the subsequent detection result; the strain gauge is adhered to the first screw, the data line is connected to a static stress-strain test analysis system, the reading of each measuring point on the strain box is observed, the first screw cap is screwed down to each group of transverse devices by adopting an interval method for pressurization, so that excessive influence on measuring point data on adjacent first screws in the pressurization process is avoided, and pressurization is finished when each group of measuring point data reaches a set value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural view of a prestressing force applying device for reinforcing a laminated wood beam according to the present invention;
FIG. 2 the accompanying drawings show a left side view of FIG. 1;
FIG. 3 the accompanying drawings show a side view of the longitudinal compression device;
FIG. 4 is a side view of the lateral compression device;
in the figure: 100-first channel steel, 200-second channel steel, 300-first screw, 400-first screw cap, 500-short steel plate, 600-steel base plate, 700-prestressed reinforcement, 800-second screw cap, M-wood beam and Q-reinforced material.
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 drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
When the prior art glues high-strength material outside and strengthens glued wood beam, because elasticity modulus mismatch between them, when glued wood reached tensile strength, the intensity of reinforcing material can not be make full use of, has caused the material waste, and the reinforcing effect is not good. Accordingly, a prestress applying device for reinforcing a laminated wood beam is proposed. The invention is used for applying prestress to the reinforced laminated wood beam, and can solve the problems that the reinforced material cannot be fully utilized, the prestress application is not accurate enough, the manufacturing quality of the prestressed reinforced beam is poor and the like when the laminated wood beam is reinforced by externally adhering high-strength materials.
Referring to fig. 1 to 4, an embodiment of the present invention discloses a prestress applying device for reinforcing a laminated wood beam, including: a transverse pressurizing device and a longitudinal pressurizing device;
the transverse pressurizing device comprises: a first channel steel 100, a second channel steel 200, a first screw 300 and a first nut 400; the first channel steel 100 is rectangular, and the notch is arranged downwards; the second channel steel 200 is the same as the first channel steel 100 in length, parallel to the first channel steel and arranged at a certain distance, and the notches of the two channel steels are arranged oppositely; two first screws 300 are symmetrically arranged at two ends of the second channel steel 200 and the first channel steel 100 in a penetrating manner, a transverse pressurizing area is formed in the middle area formed by the penetrating, and the first screws are screwed and pressurized through first nuts 400 connected to the first screws 300;
the longitudinal pressurizing device comprises: a steel backing plate 600, a prestressed reinforcement 700 and a second nut 800; two steel base plates 600 are fixed at two ends of the wood beam M, two through holes are formed in each steel base plate 600 and are respectively located at two sides of the beam body of the wood beam M, two prestressed reinforcements 700 penetrate through the through holes in the two steel base plates 600 in a one-to-one correspondence mode, and two ends of each prestressed reinforcement are screwed and pressed through second nuts 800;
wherein the wood beam M is provided with a longitudinal pressurizing device to be pressurized, then is bonded with the reinforcing material Q, and then is placed in a transverse pressurizing area to be pressurized.
The invention discloses a prestress applying device for reinforcing a glued wood beam, which is characterized in that prestress of the wood beam is applied, then a reinforcing material is bonded, and finally the wood beam and the reinforcing material are placed in a transverse pressurizing area for pressurizing, so that the problems that the reinforcing material cannot be fully utilized, the prestress application is not accurate enough, the manufacturing quality of the prestress reinforcing beam is poor and the like when the glued wood beam is reinforced by an externally bonded reinforcing material are solved.
Advantageously, the top of the wooden beam M and the bottom of the reinforcing material Q are both provided with short steel plates 500; the short steel plate is placed locally by pressurizing, so that the local pressure is prevented from being generated.
More advantageously, the short steel plate 500 has a width greater than the width of the second channel 200 and greater than the width of the first channel 100. The width of the short steel plate is about 5cm larger than that of the channel steel.
The invention also provides a prestress applying method of the reinforced laminated wood beam, which comprises the following steps: s1, firstly, installing a longitudinal pressurizing device on the wood beam, fixing a longitudinally pressurized strain gauge on the prestressed reinforcement, performing prestress pressurization, observing and recording data of the longitudinally pressurized strain gauge to a preset value; s2, removing ash and glue on the surface of the prestressed wood beam, and bonding a reinforcing material; and S3, inserting a plurality of transverse pressurizing areas corresponding to the transverse pressurizing devices along the length direction of the wood beam, arranging transverse pressurizing strain gauges on first screws of the transverse pressurizing devices at intervals, pressurizing at intervals, observing and recording the data of the transverse pressurizing strain gauges to preset values. The invention discloses a prestress applying method for a reinforced glued wood beam, which is convenient to pressurize, can realize real-time monitoring and adjust the magnitude of pressure by pasting strain gauges on a first screw and a prestressed reinforcement.
Specifically, in the S1 longitudinal pressurizing device, a steel base plate is placed at two ends of a beam body of the wood beam, then a prestressed steel bar with a proper diameter penetrates through a through hole formed in the steel base plate, the end part of the prestressed steel bar is provided with a thread, and the position of the longitudinal pressurizing device can be fixed by screwing a second nut at the end part; pasting a strain gauge at the mid-span position of the prestressed reinforcement to obtain the change conditions of stress, strain and deflection of the glued wood beam; and connecting the measuring point with the strain box, and screwing the second screw cap at the end part by using a wrench until the numerical value on the prestressed reinforcement reaches the preset prestress, wherein the data on the prestressed reinforcement measuring point is changed by screwing the adjacent prestressed reinforcement in the process, so that the two ends are required to be screwed at intervals.
S3, a transverse pressurizing device is installed, a group of first channel steel, second channel steel, a first screw and a first nut are arranged at intervals, the second channel steel is supported by two persons, the bottom of the first screw is fixed on the second channel steel (welding or the first screw and the nut are matched and fixed and the like), the top of the first screw penetrates through a reserved hole of the first channel steel, and the first nut connected to the top of the first screw is screwed, so that the first channel steel and the second channel steel are fixed and do not fall; but can not be screwed in advance so as to avoid the error caused by the pressure to the subsequent detection result; the strain gauge is adhered to the first screw, the data line is connected to a static stress-strain test analysis system, the reading of each measuring point on the strain box is observed, the first screw cap is screwed down to each group of transverse devices by adopting an interval method for pressurization, so that excessive influence on measuring point data on adjacent first screws in the pressurization process is avoided, and pressurization is finished when each group of measuring point data reaches a set value.
The transverse pressurizing device can apply pressure to the glued wood beam by screwing the first nut above the pressurizing device, and the operation method is convenient and reliable. The pressurizing device is formed by combining a plurality of monomer devices, the number of the monomers can be increased or decreased randomly along with the size change of the beam, and the pressurizing effect is ensured. In addition, real-time monitoring can be realized by sticking the strain gauge on the first screw rod, and the magnitude of applied pressure can be adjusted.
The longitudinal pressurizing device in the invention can apply prestress outside the wood beam without damaging the integrity of the section. The transverse pressurizing device enables the reinforcing material and the wood beam to be tightly pressed so as to ensure the pasting quality; the device is small in size and convenient and easy to operate, the processes of adhering reinforcing materials and applying prestress can be combined, the integrity of the section is not damaged, and when the prestress is applied, the reinforcing steel bars are longitudinally tensioned, so that the height of the laminated wood beam is reduced, the section height of the laminated wood beam can be reduced, materials are saved, construction is convenient, and the application range of the laminated wood beam can be widened. The problems of poor common working performance of the wood beam and the reinforced material, inaccurate local glue opening, inaccurate prestress application and the like are solved, and the manufacturing quality of the prestress reinforced beam is ensured. The invention combines transverse pressurization and longitudinal pressurization, and can effectively control the magnitude of longitudinal and transverse applied forces. The problems of poor common working performance of the wood beam and the reinforced material, inaccurate local glue opening, inaccurate prestress application and the like are solved, and the manufacturing quality of the prestress reinforced beam is ensured.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 are not necessarily intended to 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. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (6)
1. A prestress applying device for reinforcing a laminated wood beam, comprising: a transverse pressurizing device and a longitudinal pressurizing device;
the lateral pressurization device comprises: the first channel steel (100), the second channel steel (200), the first screw (300) and the first nut (400); the first channel steel (100) is rectangular, and the notch is arranged downwards; the second channel steel (200) and the first channel steel (100) are the same in length, parallel and arranged at a certain distance, and the notches of the second channel steel and the first channel steel are arranged oppositely; two first screw rods (300) symmetrically penetrate through two ends of the second channel steel (200) and the first channel steel (100), a transverse pressurizing area is formed in the middle area formed by the penetrating first screw rods, and the first screw caps (400) connected to the first screw rods (300) are screwed and pressurized;
the longitudinal pressing device comprises: the steel base plate (600), the prestressed reinforcement (700) and the second nut (800); two steel base plates (600) are fixed at two ends of the wood beam (M), two through holes are formed in each steel base plate (600), the two through holes are respectively located at two sides of the beam body of the wood beam (M), the two prestressed reinforcements (700) penetrate through the through holes in the two steel base plates (600) in a one-to-one correspondence mode, and two ends of each prestressed reinforcement are screwed and pressed through the second nuts (800);
wherein the wood beam (M) is installed with the longitudinal pressurizing device to bond the reinforcing material (Q) after pressurization, and then the transverse pressurizing area is placed for pressurization.
2. A prestressed applicator for reinforced laminated wood beam according to claim 1, wherein said top of wood beam (M) and said bottom of reinforcing material (Q) are each provided with a short steel plate (500).
3. The prestress application device for a reinforced laminated wood beam according to claim 2, wherein the short steel plate (500) has a width greater than a width of the second channel (200) and a width greater than a width of the first channel (100).
4. A prestress application method for a reinforced laminated wood beam is characterized by comprising the following steps: s1, firstly, installing a longitudinal pressurizing device on the wood beam, fixing a longitudinally pressurized strain gauge on the prestressed reinforcement, performing prestress pressurization, observing and recording data of the longitudinally pressurized strain gauge to a preset value; s2, removing ash and glue on the surface of the prestressed wood beam, and bonding a reinforcing material; and S3, inserting a plurality of transverse pressurizing areas corresponding to the transverse pressurizing devices along the length direction of the wood beam, arranging transverse pressurizing strain gauges on first screws of the transverse pressurizing devices at intervals, pressurizing at intervals, observing and recording the data of the transverse pressurizing strain gauges to preset values.
5. The prestress application method for the reinforced glued wood beam as claimed in claim 4, wherein S1 is implemented by installing a longitudinal press device, wherein steel tie plates are first placed at two ends of the beam body of the wood beam, then prestressed steel bars with proper diameters are passed through holes formed in the steel tie plates, the ends of the prestressed steel bars are provided with threads, and the position of the longitudinal press device can be fixed by screwing second nuts at the ends; pasting a strain gauge at the mid-span position of the prestressed reinforcement to obtain the change conditions of stress, strain and deflection of the glued wood beam; and connecting the measuring point with the strain box, and screwing the second screw cap at the end part by using a wrench until the numerical value on the prestressed reinforcement reaches the preset prestress, wherein the data on the prestressed reinforcement measuring point is changed by screwing the adjacent prestressed reinforcement in the process, so that the two ends are required to be screwed at intervals.
6. The prestress application method for the reinforced laminated wood beam as claimed in claim 4, wherein S3 is implemented by installing a transverse pressing device, arranging a set of first channel steel, second channel steel, first screw rods and first screw caps at regular intervals, supporting the second channel steel by two persons, fixing the bottoms of the first screw rods on the second channel steel, penetrating the tops of the first screw rods through the preformed holes of the first channel steel, and screwing the first screw caps connected to the tops of the first screw rods, so that the first channel steel and the second channel steel are fixed and do not fall; but can not be screwed in advance so as to avoid the error caused by the pressure to the subsequent detection result; the strain gauge is adhered to the first screw, the data line is connected to a static stress-strain test analysis system, the reading of each measuring point on the strain box is observed, the first screw cap is screwed down to each group of transverse devices by adopting an interval method for pressurization, so that excessive influence on measuring point data on adjacent first screws in the pressurization process is avoided, and pressurization is finished when each group of measuring point data reaches a set value.
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