Manufacturing method of modularized FFRP bamboo-wood composite laminated timber thin-wall beam structure

Abstract

The invention belongs to the technical field of buildings, and relates to a manufacturing method of a modularized FFRP bamboo-wood composite laminated timber thin-wall beam structure, which comprises the following steps of: selecting poplar veneers and bamboo bundle veneers, sequentially drying, impregnating and assembling, and performing hot pressing and edge cutting on bamboo-wood composite laminated timber to obtain a bamboo-wood composite laminated timber thin-wall beam structure; a bamboo-wood composite laminated timber test piece is cut according to the shape of the cross section of a thin-wall beam structure, then assembling is conducted in a mortise and tenon joint mode, the outer surface of the bamboo-wood composite laminated timber thin-wall beam is wrapped with resin impregnated fiber cloth, and the FFRP bamboo-wood composite laminated timber thin-wall beam is obtained after winding and heating curing are conducted. The bamboo-wood composite laminated timber panels and the bamboo-wood composite laminated timber corner blocks are connected in a mortise and tenon joint mode, so that an interlocking effect can be generated among all the modules, all the composition modules are prevented from sliding in a bent state, the transverse bending bearing capacity of the thin-wall beam structure is improved, and the overall stability of the thin-wall beam structure is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of construction and relates to a method for manufacturing a modular FFRP bamboo-wood composite laminated timber thin-wall beam structure. Background Art

[0002] A thin-walled beam is a beam composed of thin plates, thin shells and slender rods, and its maximum cross-sectional dimension is much smaller than the longitudinal dimension. In some cases, the thin-walled beam has a hard frame in the transverse direction to ensure that the cross section does not deform greatly in its own plane after being subjected to force. Thin-walled beam structures are often produced by compression molding, folding and modular assembly. Among them, the modular assembly method is a mold-free manufacturing method, which was developed and developed under the inspiration of the front compression molding method and the folding method. Its principle is to quickly assemble the pre-designed standard wood modules into temporary wood components through corner nails to form a structure with an ideal cross-sectional shape. Then, the temporary wood components are reinforced by tightly wrapping continuous FRP (fiber reinforced composite material) around the periphery, and a complete FRP-wood composite thin-walled component is formed after solidification.

[0003] However, when manufacturing thin-walled beam structures using the modular assembly method, each component module has only one contact surface in shape, which makes it easy for them to slip under bending and difficult to withstand lateral bending, resulting in limited force-bearing capacity and poor overall stability of the thin-walled beam structure. Summary of the invention

[0004] The purpose of the present invention is to provide a method for manufacturing a modular FFRP bamboo-wood composite laminated timber thin-walled beam structure, which can prevent the various component modules of the thin-walled beam structure from sliding under a bending state, improve its ability to withstand lateral bending, and increase the overall stability of the thin-walled beam structure.

[0005] To achieve the above-mentioned purpose, the specific technical scheme of a manufacturing method of a modular FFRP bamboo-wood composite laminated timber thin-walled beam structure provided by the present invention is as follows:

[0006] A method for manufacturing a modular FFRP bamboo-wood composite laminated timber thin-walled beam structure comprises the following steps:

[0007] Poplar veneers and bamboo bundle veneers are selected, and the poplar veneers and bamboo bundle veneers are sequentially dried and impregnated with glue, and then the processed poplar veneers and bamboo bundle veneers are assembled to make bamboo-wood composite laminated materials.

[0008] The bamboo-wood composite laminated timber is hot pressed, cooled and cured to room temperature after hot pressing, and then trimmed to obtain bamboo-wood composite laminated timber specimens of specified size and appearance.

[0009] The bamboo-wood composite laminated timber specimens are cut according to the cross-sectional shape of the thin-walled beam structure to obtain the required number of bamboo-wood composite laminated timber panels and bamboo-wood composite laminated timber corner blocks, and then the corresponding number of bamboo-wood composite laminated timber panels and bamboo-wood composite laminated timber corner blocks are assembled by using mortise and tenon joints to obtain bamboo-wood composite laminated timber thin-walled beams.

[0010] The bidirectional satin woven FFRP fabric is impregnated and cured to obtain a resin impregnated fiber cloth.

[0011] The resin-impregnated fiber cloth is wrapped on the outer surface of the bamboo-wood composite laminated timber thin-walled beam, and then a heat shrink tape is wrapped around the resin-impregnated fiber cloth. The heat shrink tape is then heated and removed after curing to obtain the FFRP bamboo-wood composite laminated timber thin-walled beam.

[0012] The present invention is also characterized in that:

[0013] The moisture content of the poplar veneer and the bamboo bundle veneer obtained after drying is 6% to 8%.

[0014] The dipping treatment uses a phenolic resin adhesive diluted with water, and the dipping time is 30 minutes to 120 minutes. After the dipping is completed, the poplar veneer and the bamboo bundle veneer are taken out to dry and dried to make their moisture content 8% to 10%. The dipping amount of the poplar veneer is 9.3% to 10.3% of its weight, and the dipping amount of the bamboo bundle veneer is 10.9% to 12.1%.

[0015] When poplar veneer and bamboo bundle veneer are assembled, the assembling method is to use the grain-oriented assembly method, the middle core layer is bamboo bundle veneer, and the upper and lower surfaces are poplar veneer. The air-dry density of bamboo-wood composite laminate is controlled at 0.75g / cm 3 ~3g / cm 3 .

[0016] Before hot pressing, the bamboo-wood composite laminate is pre-pressed at room temperature for 5 minutes to 10 minutes.

[0017] The hot pressing process is performed at a temperature of 120°C to 160°C, a pressure of 1MPa to 2MPa, and a time of 20min to 40min.

[0018] The cooling maintenance adopts water cooling maintenance or air cooling maintenance.

[0019] The thickness of the bamboo-wood composite laminated timber panel is less than or equal to the radius of the bamboo-wood composite laminated timber corner block.

[0020] When the mortise and tenon joint method is adopted for assembly, mortise grooves are respectively provided on the two connecting surfaces of each bamboo-wood composite laminated timber corner block along its length direction, the mortise groove width is 8mm-12mm, and the mortise groove depth is 4mm-6mm, and then tenons matching the mortise grooves are respectively provided on the two connecting surfaces of each bamboo-wood composite laminated timber panel.

[0021] When the bidirectional satin woven FFRP fabric is impregnated, bisphenol A epoxy resin is used to impregnate the bidirectional satin woven FFRP fabric, and the resin-impregnated fiber cloth is wrapped on the outer surface of the bamboo-wood composite laminated timber thin-walled beam by hand lay-up process.

[0022] The manufacturing method of the modular FFRP bamboo-wood composite laminated timber thin-walled beam structure of the present invention has the following advantages:

[0023] First, by using mortise and tenon joints for the bamboo-wood composite laminated timber panels and the bamboo-wood composite laminated timber corner blocks, an interlocking effect can be generated between the modules, thereby preventing the components from sliding under bending, improving their ability to withstand lateral bending, and increasing the overall stability of the thin-walled beam structure. At the same time, by wrapping with resin-impregnated fiber cloth containing FFRP, the bamboo-wood composite laminated timber thin-walled beam structure can be reinforced, so that the mechanical strength of the bamboo-wood composite laminated timber thin-walled beam structure is significantly improved.

[0024] Secondly, the present invention can not only realize assembled installation and improve construction efficiency, but also realize close connection between panels, effectively ensuring the air tightness of the bamboo-wood composite laminated timber board and the bamboo-wood composite laminated timber corner block.

[0025] Third, compared with traditional materials, the FFRP material used in the present invention is a green building material, which is degradable and renewable, and can effectively solve the problem of environmental pollution. It has good hygroscopicity, lightweight, environmentally friendly and degradable characteristics, as well as some excellent properties of polymers. At the same time, the bamboo-wood composite veneer laminated timber combines the advantages of bamboo and wood, and has higher strength and durability. Compared with traditional plywood, the bamboo-wood composite veneer laminated timber is lighter and utilizes the fast growth rate and renewable characteristics of bamboo. It has significant advantages in environmental protection and sustainability, reduces the demand for traditional wood resources, and helps to protect forest resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the manufacturing process of the FFRP bamboo-wood composite laminated timber thin-walled beam structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the FFRP bamboo-wood composite laminated timber thin-walled beam structure of the present invention. Figure 3It is a schematic diagram of the cross-sectional geometric structure of the FFRP bamboo-wood composite laminated timber thin-walled beam structure of the present invention. Figure 4 It is a schematic diagram of the modular component structure of the cross section of the FFRP bamboo-wood composite laminated timber thin-walled beam structure of the present invention. DETAILED DESCRIPTION

[0028] The technical solution in the present application will be described clearly and in detail below in conjunction with the accompanying drawings. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, such as A and / or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two. The following terms "first" and "second" are used for descriptive purposes only and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0029] like Figure 1 As shown, the present invention provides a method for manufacturing a modular FFRP bamboo-wood composite laminated timber thin-walled beam structure, comprising the following steps:

[0030] Selecting poplar veneers and bamboo bundle veneers, drying and dipping the poplar veneers and bamboo bundle veneers in sequence, and then assembling the treated poplar veneers and bamboo bundle veneers to make bamboo-wood composite laminated materials;

[0031] The bamboo-wood composite laminated timber is hot pressed, cooled and cured to room temperature after hot pressing, and then trimmed to obtain bamboo-wood composite laminated timber specimens of specified size and appearance.

[0032] The bamboo-wood composite laminated timber specimens are cut according to the cross-sectional shape of the thin-walled beam structure to obtain the required number of bamboo-wood composite laminated timber panels and bamboo-wood composite laminated timber corner blocks, and then the corresponding number of bamboo-wood composite laminated timber panels and bamboo-wood composite laminated timber corner blocks are assembled by using mortise and tenon joints to obtain bamboo-wood composite laminated timber thin-walled beams.

[0033] The bidirectional satin woven FFRP fabric is impregnated and cured to obtain a resin impregnated fiber cloth.

[0034] The resin-impregnated fiber cloth is wrapped on the outer surface of the bamboo-wood composite laminated timber thin-walled beam, and then a heat shrink tape is wrapped around the resin-impregnated fiber cloth. The heat shrink tape is then heated and removed after curing to obtain the FFRP bamboo-wood composite laminated timber thin-walled beam.

[0035] Among them, the full English name of FFRP is Flax Fibre-Reinforced Polymer, and the full Chinese name is flax fiber reinforced polymer.

[0036] Among them, the moisture content of the poplar veneer and bamboo bundle veneer obtained after drying treatment is 6% to 8%, and the drying temperature is above 100°C. The high temperature above 100°C can kill wood-rotting fungi, bamboo-rotting fungi or adult insects or eggs such as termites. At the same time, the moisture content of the poplar veneer and bamboo bundle veneer after drying is within 15%, which can effectively prevent the survival of termites and wood-rotting fungi and bamboo-rotting fungi, and the stable moisture content also makes it difficult for the material to crack.

[0037] Among them, the dipping treatment uses phenolic resin adhesive diluted with water, the solid content of the diluted phenolic resin adhesive is 30%, the dipping treatment time is 30min to 120min, and after the dipping is completed, the poplar veneer and the bamboo bundle veneer are taken out and dried to make their moisture content 8% to 10%, which is determined by factors such as material thickness and density, adhesive dilution, processing temperature and humidity, equipment conditions and process requirements. The dipping amount of poplar veneer is 9.3% to 10.3% of its weight. In actual operation, this range can ensure that the dipping amount is controlled within a reasonable accuracy, and the dipping amount of bamboo bundle veneer is 10.9% to 12.1%. Such a range can ensure that the dipping amount is controlled within a reasonable accuracy and ensure the quality and performance of bamboo bundle veneer. Low molecular weight phenolic resin dipping is a simple, low-cost and most widely used veneer modification and enhancement method. The cell cavity, vessels and fibers of wood tracheids, the pits on the cell wall and the pores between cellulose microfibrils constitute the hierarchical porous structure of wood, which provides favorable conditions for wood modification and enhancement. During the impregnation process, phenolic resin fills the unevenness of the wood surface by expelling the air in the pore structure, accompanied by a small amount of penetration.

[0038] Among them, when poplar veneer and bamboo bundle veneer are assembled, the assembling method is to use the parallel grain, the middle core layer is bamboo bundle veneer, and the upper and lower surfaces are poplar veneer. The air-dry density of bamboo-wood composite laminate is controlled at 0.75g / cm 3 ~3g / cm 3 .

[0039] Among them, before hot pressing, the bamboo-wood composite laminate is pre-pressed at room temperature, and the pre-pressing time is 5min to 10min. The temperature of hot pressing is 120℃ to 160℃, the pressure is 1MPa to 2MPa, and the time is 20min to 40min. The specific time is determined according to the curing characteristics of the phenolic resin adhesive and the thickness of the bamboo-wood composite laminate. During the hot pressing process, the phenolic resin in the wood pores will flow in the wedge-shaped cracks and surface ducts on the wood surface under the action of temperature and pressure, and penetrate deeply along the direction of the wood rays. When entering the tracheid wall layer, it has an enhancing effect on the static mechanical properties of the wood tracheid. At the same time, the low molecular weight phenolic resin will also react chemically with the cell wall polymer to improve the dimensional stability of the wood. At the same time, the filling of the wood pore structure by the low molecular weight phenolic resin can support the overall structure of the cell. When the low molecular weight phenolic resin enters the cell wall and swells the cell wall, and reacts chemically with the cell wall components, it can play a role in strengthening the cell wall, significantly improving the modification effect and lasting stability.

[0040] Among them, cooling maintenance adopts water cooling maintenance or air cooling maintenance to accelerate cooling maintenance.

[0041] Among them, after the trimming process, the bamboo-wood composite laminated timber specimens are sanded and surface treated to make the surfaces of the bamboo-wood composite laminated timber specimens smooth and flat.

[0042] The thickness of the bamboo-wood composite laminated timber panel is less than or equal to the radius of the bamboo-wood composite laminated timber corner block, so as to avoid local stress caused by contact and interference between the bamboo-wood composite laminated timber panel and the bamboo-wood composite laminated timber corner block.

[0043] like Figure 2 As shown, when the mortise and tenon joint method is adopted for assembly, mortise grooves are respectively provided on the two connecting surfaces of each bamboo-wood composite laminated timber corner block along its length direction, the mortise groove width is 8mm-12mm, and the mortise groove depth is 4mm-6mm, and then tenons matching the mortise grooves are respectively provided on the two connecting surfaces of each bamboo-wood composite laminated timber panel.

[0044] Among them, when the resin-impregnated fiber cloth is wrapped on the outer surface of the bamboo-wood composite laminated timber thin-walled beam by hand-laying process, it starts from the center line of the bamboo-wood composite laminated timber thin-walled beam and ends when a certain lateral overlap distance is generated. When only one layer of wrapping is required, the lateral overlap distance is 50 to 150 mm. When two or more layers of wrapping are required, there is no need to consider the overlap problem. The resin-impregnated fiber cloth is directly cut and wrapped according to the length corresponding to the number of layers. At the same time, the number of resin-impregnated fiber cloth used has a significant effect on the bending performance of the FFRP bamboo-wood composite laminated timber thin-walled beam. Compared with the FFRP bamboo-wood composite laminated timber thin-walled beam sample with one layer of resin-impregnated fiber cloth, the three-layer FFRP bamboo-wood composite laminated timber thin-walled beam has a more obvious increase in strength and stiffness, that is, the strategic addition of the number of layers of resin-impregnated fiber cloth can effectively reduce the occurrence of local buckling and edge cracking failure.

[0045] When the heat shrinkable tape is heated, a hot air gun is used to heat the heat shrinkable tape to shrink and generate pressure, so as to ensure a tight connection between the resin-impregnated fiber cloth and the bamboo-wood composite laminate thin-walled beam and squeeze out excess resin therefrom, thereby making the surface of the resin-impregnated fiber cloth smooth.

[0046] When the bidirectional satin woven FFRP fabric is impregnated, bisphenol A epoxy resin is used to impregnate the bidirectional satin woven FFRP fabric, and the resin-impregnated fiber cloth is wrapped on the outer surface of the bamboo-wood composite laminated timber thin-walled beam by hand lay-up process.

[0047] Example 1

[0048] like Figure 3 , Figure 4 As shown, a thin-walled beam sample with a square cross-section is taken as an example, where the length of the thin-walled beam is selected as L = 4200 mm, the thickness of the plate is selected as t = 14 mm, and the original side length is selected as S1 = S2 = 200 mm. Since the fillet radius provided by the thin-walled beam is r = 38 mm, the width of the plate becomes s1 = s2 = 124 mm. At this time, the mortise and tenon structure has a mortise and tenon groove width of 12 mm and a mortise and tenon groove depth of 6 mm.

[0049] Select poplar veneer and bamboo bundle veneer, dry the poplar veneer and bamboo bundle veneer, the moisture content of the poplar veneer and bamboo bundle veneer obtained after drying is 6% to 8%, then perform glue dipping, put the dried poplar veneer and bamboo bundle veneer into phenolic resin adhesive diluted with water, the dipping time is 30 minutes, after the dipping is completed, take out the poplar veneer and bamboo bundle veneer to dry and dry them to make the moisture content of 8% to 10%, then assemble the dried and dipped poplar veneer and bamboo bundle veneer into bamboo The bamboo-wood composite laminate is pre-pressed at room temperature for 5 to 10 minutes, and then hot-pressed at a temperature of 120 to 160°C, a pressure of 1 MPa to 2 MPa, and a time of 20 to 40 minutes. After hot-pressing, the bamboo-wood composite laminate is cooled and cured to room temperature, and then trimmed. , obtain bamboo-wood composite laminated timber specimens of specified size and appearance, then cut the bamboo-wood composite laminated timber specimens according to the square cross-sectional shape of the thin-walled beam structure, obtain four bamboo-wood composite laminated timber panels with a width of 124 mm and four bamboo-wood composite laminated timber corner blocks with a fillet radius of 38 mm, and respectively open mortises with a width of 12 mm and a depth of 6 mm on the two connecting surfaces of each bamboo-wood composite laminated timber corner block, respectively set tenons matching the mortise and tenon grooves on the two connecting surfaces of each bamboo-wood composite laminated timber panel, and then The FFRP bamboo-wood composite laminated timber panel and the four bamboo-wood composite laminated timber corner blocks are assembled by mortise and tenon joints, and the four bamboo-wood composite laminated timber panels are aligned with the four bamboo-wood composite laminated timber corner blocks by a veneer laminated timber fixture to obtain a bamboo-wood composite laminated timber thin-walled beam. The resin-impregnated fiber cloth is wrapped on the outer surface of the bamboo-wood composite laminated timber thin-walled beam by a hand-layup process, and then a heat shrink tape is wrapped around the resin-impregnated fiber cloth. The heat shrink tape is then heated and removed after curing to obtain a FFRP bamboo-wood composite laminated timber thin-walled beam with a square cross-section.

[0050] Example 2

[0051] like Figure 3 , Figure 4 As shown, a thin-walled beam sample with a rectangular cross section is taken as an example, where the length of the thin-walled beam is selected as L = 4200mm, the plate thickness is selected as t = 14mm, and the original side lengths are selected as S1 = 300mm and S2 = 100mm. In order to avoid manufacturing a plate length that is too short, the fillet radius is set to r = 24mm, resulting in a plate width of s1 = 252mm and s2 = 52mm. At this time, the mortise and tenon structure has a mortise and tenon groove width of 8mm and a mortise and tenon groove depth of 4mm.

[0052] Select poplar veneers and bamboo bundle veneers, dry the poplar veneers and bamboo bundle veneers, the moisture content of the poplar veneers and bamboo bundle veneers obtained after drying is 6% to 8%, and then perform a dipping treatment, put the dried poplar veneers and bamboo bundle veneers into a phenolic resin adhesive diluted with water, and the dipping time is 30 minutes. After the dipping is completed, take out the poplar veneers and bamboo bundle veneers and dry them to make their moisture content 8% to 10%, and then assemble the dried and dipped poplar veneers and bamboo bundle veneers to make a bamboo-wood composite layer At the same time, the bidirectional satin woven FFRP fabric is impregnated in bisphenol A epoxy resin, and the resin impregnated fiber cloth is obtained after curing. The bamboo-wood composite laminated material is first pre-pressed at room temperature for 5 minutes to 10 minutes, and then hot-pressed at a temperature of 120°C to 160°C, a pressure of 1MPa to 2MPa, and a time of 20 minutes to 40 minutes. After hot pressing, the bamboo-wood composite laminated material is cooled and cured to room temperature, and then trimmed to obtain a specified size and appearance. The bamboo-wood composite laminated timber specimens were cut according to the rectangular cross-sectional shape of the thin-walled beam structure to obtain two bamboo-wood composite laminated timber panels with a width of 252 mm, two bamboo-wood composite laminated timber panels with a width of 52 mm and four bamboo-wood composite laminated timber corner blocks with a fillet radius of 24 mm, and mortise grooves with a width of 8 mm and a depth of 4 mm were respectively opened on the two connecting surfaces of each bamboo-wood composite laminated timber corner block, and tenons matching the mortise grooves were respectively set on the two connecting surfaces of each bamboo-wood composite laminated timber panel, and then Four bamboo-wood composite laminated timber panels and four bamboo-wood composite laminated timber corner blocks are assembled by using mortise and tenon joints, and a veneer laminated timber fixture is used to align the four bamboo-wood composite laminated timber panels with the four bamboo-wood composite laminated timber corner blocks to obtain a bamboo-wood composite laminated timber thin-walled beam, and resin-impregnated fiber cloth is wrapped on the outer surface of the bamboo-wood composite laminated timber thin-walled beam by using a hand-layup process, and then a heat shrink tape is wrapped around the resin-impregnated fiber cloth, and then the heat shrink tape is heated, and the heat shrink tape is removed after curing to obtain a FFRP bamboo-wood composite laminated timber thin-walled beam with a rectangular cross-section.

[0053] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A method for manufacturing a modular FFRP bamboo-wood composite laminated timber thin-walled beam structure, characterized in that: The following steps are involved: Selecting poplar veneers and bamboo bundle veneers, drying and dipping the poplar veneers and bamboo bundle veneers in sequence, and then assembling the treated poplar veneers and bamboo bundle veneers to make bamboo-wood composite laminated materials; The bamboo-wood composite laminated timber is hot-pressed, and after hot-pressing, the bamboo-wood composite laminated timber is cooled and cured to room temperature, and then edge-cutting is performed on the bamboo-wood composite laminated timber to obtain a bamboo-wood composite laminated timber specimen with a specified size and appearance; The bamboo-wood composite laminated timber specimen is cut according to the cross-sectional shape of the thin-walled beam structure to obtain the required number of bamboo-wood composite laminated timber panels and bamboo-wood composite laminated timber corner blocks, and then the corresponding number of bamboo-wood composite laminated timber panels and bamboo-wood composite laminated timber corner blocks are assembled by using mortise and tenon joints to obtain the bamboo-wood composite laminated timber thin-walled beam; The bidirectional satin woven FFRP fabric is impregnated and cured to obtain a resin impregnated fiber cloth; The resin-impregnated fiber cloth is wrapped on the outer surface of the bamboo-wood composite laminated timber thin-walled beam, and then a heat shrink tape is wrapped around the resin-impregnated fiber cloth. The heat shrink tape is then heated and removed after curing to obtain the FFRP bamboo-wood composite laminated timber thin-walled beam.

2. The manufacturing method of modular FFRP bamboo-wood composite laminated timber thin-walled beam structure according to claim 1, characterized in that: The moisture content of the poplar veneer and the bamboo bundle veneer obtained after the drying treatment is 6% to 8%.

3. The manufacturing method of modular FFRP bamboo-wood composite laminated timber thin-walled beam structure according to claim 1, characterized in that: The dipping treatment uses a phenolic resin adhesive diluted with water, and the dipping treatment time is 30 minutes to 120 minutes. After the dipping is completed, the poplar veneer and the bamboo bundle veneer are taken out to dry and dried to make their moisture content 8% to 10%. The dipping amount of the poplar veneer is 9.3% to 10.3% of its weight, and the dipping amount of the bamboo bundle veneer is 10.9% to 12.1%.

4. The manufacturing method of modular FFRP bamboo-wood composite laminated timber thin-walled beam structure according to claim 1, characterized in that: When the poplar veneer and the bamboo bundle veneer are assembled, the assembling is carried out in the same grain, the assembling method is that the middle core layer is the bamboo bundle veneer, and the upper and lower surfaces are the poplar veneer. The air-dry density of the bamboo-wood composite laminate is controlled at 0.75g / cm 3 ~3g / cm 3 .

5. The manufacturing method of modular FFRP bamboo-wood composite laminated timber thin-walled beam structure according to claim 1, characterized in that: Before the hot pressing, the bamboo-wood composite laminate is pre-pressed at room temperature for 5 to 10 minutes.

6. The method for manufacturing a modular FFRP bamboo-wood composite laminated timber thin-walled beam structure according to claim 1, characterized in that: The temperature of the hot pressing is 120° C. to 160° C., the pressure is 1 MPa to 2 MPa, and the time is 20 min to 40 min.

7. The method for manufacturing a modular FFRP bamboo-wood composite laminated timber thin-walled beam structure according to claim 1, characterized in that: The cooling curing adopts water cooling curing or air cooling curing.

8. The method for manufacturing a modular FFRP bamboo-wood composite laminated timber thin-walled beam structure according to claim 1, characterized in that: The thickness of the bamboo-wood composite laminated timber panel is less than or equal to the radius of the bamboo-wood composite laminated timber corner block.

9. The method for manufacturing a modular FFRP bamboo-wood composite laminated timber thin-walled beam structure according to claim 1, characterized in that: When the mortise and tenon joint method is used for assembly, mortise grooves are respectively provided on the two connecting surfaces of each bamboo-wood composite laminated timber corner block along its length direction, the mortise groove width is 8mm-12mm, and the mortise groove depth is 4mm-6mm, and then tenons matching the mortise grooves are respectively provided on the two connecting surfaces of each bamboo-wood composite laminated timber panel.

10. The method for manufacturing a modular FFRP bamboo-wood composite laminated timber thin-walled beam structure according to claim 1, characterized in that: When the bidirectional satin woven FFRP fabric is impregnated, bisphenol A epoxy resin is used to impregnate the bidirectional satin woven FFRP fabric, and the resin impregnated fiber cloth is wrapped on the outer surface of the bamboo-wood composite laminated timber thin-walled beam by a hand lay-up process.

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