CN216766204U

CN216766204U - FRP-anticorrosion wood combined truss structure

Info

Publication number: CN216766204U
Application number: CN202123245302.XU
Authority: CN
Inventors: 唐明杰; 祝明桥; 宋娟; 胡秀兰; 王磊佳
Original assignee: Hunan University of Science and Technology
Current assignee: Hunan University of Science and Technology
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-06-17
Anticipated expiration: 2031-12-22

Abstract

The utility model discloses an FRP (fiber reinforced plastic) -anticorrosive wood combined truss structure, which comprises an FRP (fiber reinforced plastic) section tension member, an anticorrosive wood rod compression-resistant member and a metal node, wherein the FRP section tension member is connected with the anticorrosive wood rod compression-resistant member through the metal node; the FRP profile tension member comprises an FRP profile and double-sleeve connecting pieces positioned at two ends of the FRP profile, the anticorrosive wood rod compression-resistant member comprises an anticorrosive wood rod and sleeve connecting pieces positioned at two ends of the anticorrosive wood rod, and the FRP profile tension members and the anticorrosive wood rod compression-resistant members are connected through metal nodes to form the FRP-anticorrosive wood combined truss structure. According to the utility model, the FRP sectional material and the anticorrosion wood pole are combined into the truss structure in a specific node connection mode, so that the mechanical characteristics of all materials are fully exerted, the consumption of metal materials in the whole truss structure is small, and the consumption of non-renewable energy is reduced; the FRP-anticorrosion wood composite truss integrally shows the mechanical characteristics of light weight and high strength, and the anti-seismic performance and the fatigue resistance of the FRP-anticorrosion wood composite truss are greatly improved compared with those of a steel truss and a reinforced concrete truss.

Description

FRP-anticorrosive wood combined truss structure

Technical Field

The utility model discloses an FRP (fiber reinforced plastic) -anticorrosion wood combined truss structure.

Background

The Fiber Reinforced Polymer (FRP) is a high-performance composite material formed by combining a Fiber material and a matrix material through a specific processing technology, and has the advantages of light self weight, good chemical corrosion resistance, good insulating property, simple forming technology, high tensile strength and the like. The wood is widely used in the traditional building structure and is a renewable environment-friendly building material. At present, the application of the wood anticorrosion technology greatly improves the corrosion resistance of the wood, and the wood can be better applied to various building structures. At present, the global steel consumption is very large, but a large amount of non-renewable energy sources need to be consumed in steel making, and a certain necessity exists for searching a novel structural material to replace the steel. In recent years, experts in the field of civil engineering have made a lot of work on application and popularization of FRP, but FRP is still rarely applied in practical engineering, and the key is that FRP materials have anisotropic characteristics, and meanwhile, the problem of connection between the materials has not been broken through.

In the patent document with publication number CN204510471U, an FRP-wood composite truss structure is disclosed, which uses square wood, FRP laths, web members, reinforcing plates, etc. to form a composite truss structure, the wood is joggled, and the wood and FRP are bonded by epoxy resin. The concrete material and the cross-section form of reinforcing plate are not clear and definite to this patent, and truss structure form is single, and the area of contact of square timber and FRP lath junction is less, uses epoxy to glue and can not reach the expectancy effect by fixed.

In the patent document with the publication number CN110056118A, an FRP space truss sea sand concrete slab structure is disclosed, in which the truss structure is a space truss structure, all members in the truss are made of FRP material, and the connection node is an FRP threaded sleeve ball node. The patent does not consider the characteristic that the self weight of the structure is larger after the concrete slab is poured, and the FRP component and the ball joint are connected only by adopting common threads, so that the requirement on the joint connection strength of the joint under the stress state of the structure can not be met.

In the patent document with publication number CN102505638A, a method for preparing a main bearing capacity resin-based composite material-steel truss composite structure is disclosed. The components in the patent are all FRP pipes, and the node connection implementation steps are as follows: the pretightening force ruler joint and the FRP pipe are connected into a component, and then the components are connected in a welding mode. The FRP pipe end in the patent is more jagged, which destroys the integrity of the member and causes the local strength to be reduced. In addition, the tooth punching process of the FRP pipe is complex, the precision requirement on parts is high, and the cost is greatly increased.

In summary, in the prior patent publications, the layout form and the node connection mode of the truss structural members are mostly problematic, the functions are not comprehensive enough, and the popularization significance is not great.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the FRP-anticorrosion wood combined truss structure which is simple in structure, good in anti-seismic fatigue resistance and low in maintenance cost.

The technical scheme for solving the problems is as follows: an FRP-anticorrosion wood composite truss structure comprises an FRP section tension member, an anticorrosion wood rod compression member and a metal node; the FRP profile tension member comprises an FRP profile and double-sleeve connecting pieces positioned at two ends of the FRP profile, the anticorrosive wood rod compression members comprise anticorrosive wood rods and sleeve connecting pieces positioned at two ends of the anticorrosive wood rods, and the FRP profile tension members and the anticorrosive wood rod compression members are connected through metal nodes to form the FRP-anticorrosive wood combined truss structure.

In the FRP-anticorrosion wood combined truss structure, the double-sleeve connecting piece is integrally formed and comprises an inner sleeve, an outer sleeve and a ball body at the end part, the inner sleeve is sleeved in the outer sleeve, a gap between the inner sleeve and the outer sleeve is used for inserting the FRP profile, a plurality of ribs protruding from the pipe wall are uniformly distributed on the outer wall of the inner sleeve and the inner wall of the outer sleeve along the axial direction and used for fixing the position of the FRP profile in the double-sleeve connecting piece, and the FRP profile is inserted into the gap between the inner sleeve and the outer sleeve and is bonded by filling epoxy resin glue between the inner sleeve and the outer sleeve to form an FRP profile tension member; one end of the inner sleeve and one end of the outer sleeve are connected together and are connected with the end ball body through the cylindrical rod, metal ribs are uniformly distributed on the connecting position of the cylindrical rod and the outer sleeve along the radial direction of the cylindrical rod, and a through hole is formed in the end ball body.

According to the FRP-anticorrosion wood combined truss structure, the outer diameter of the FRP section is smaller than the inner diameter of the outer sleeve, the difference range is 0.1-5mm, the inner diameter of the FRP section is larger than the outer diameter of the inner sleeve, and the difference is consistent with the difference between the outer diameter of the FRP section and the inner diameter of the outer sleeve; the axial length of the outer sleeve is more than 1 time of the outer diameter of the FRP section, and the length of the inner sleeve is more than 1.5 times of the length of the outer sleeve; the inner sleeve and the outer sleeve are in variable cross-section forms with large wall thickness at the end close to the end ball body and small wall thickness at the other end, the maximum wall thickness is more than 1 time of the wall thickness of the FRP section, and the value range of the minimum wall thickness is less than 0.5 time of the maximum wall thickness.

According to the FRP-anticorrosion wood combined truss structure, the sleeve connecting piece is integrally formed and comprises a metal sleeve, a radial reinforcing section, a bolt, a cylinder and a spherical end, the middle part of the outer wall of the metal sleeve is provided with the raised radial reinforcing section, a plurality of threaded holes are uniformly distributed on the radial reinforcing section along the radial direction, the holes of the threaded holes point to the centroid direction of the section, the bolt matched with the threaded holes is arranged in the threaded holes and used for applying pretightening force to an anticorrosion wood rod inserted into the metal sleeve, and the radial distribution quantity of the bolts is determined according to the section size of the anticorrosion wood rod; the anticorrosion wood compression-resistant component is formed by inserting an anticorrosion wood rod into a metal sleeve and tightening a bolt; the end part of the metal sleeve is connected with an end part ball through a cylinder, stiffening ribs are uniformly distributed on the connection part of the cylinder and the sleeve along the radial direction of the cylinder, and a through hole is formed in the end part ball.

In the FRP-anticorrosion wood combined truss structure, the outer diameter of the anticorrosion wood rod is consistent with the inner diameter of the metal sleeve; the length of the metal sleeve is more than 1 time of the outer diameter of the anti-corrosion wood rod, and the wall thickness of the metal sleeve is more than 0.05 time of the outer diameter of the anti-corrosion wood rod; the protruding thickness of radial reinforcement section is the same with the bolt diameter, and radial reinforcement section extends axial width and is 2 times of bolt diameter.

In the FRP-anticorrosion wood combined truss structure, the metal node is divided into A, B two parts, which are both in a step shape with thin edges and thick middle and are integrally formed; a. The part B is provided with spherical grooves for placing end balls or end spheres, the part A is provided with cylindrical bolts, the bolts are divided into a first class bolt and a second class bolt, the end part of the second class bolt is provided with threads, the number of the first class bolts is consistent with the number of connecting members at the metal node, and a single second class bolt is arranged at the centroid position of the part A of the metal node; cylindrical non-through holes and through holes matched with the cylindrical bolts of the part A in size are distributed in the part B of the metal node, one type of bolts of the part A are inserted into the non-through holes of the part B, the second type of bolts of the part A are inserted into the through holes of the part B, and matched nuts are screwed into the threaded end parts of the second type of bolts, so that the two parts of the metal node A, B form a whole.

In the FRP-anticorrosion wood combined truss structure, the FRP section is formed by pultrusion, and the section form is any one of a circular tube, an elliptical tube, a square tube, a polygonal tube and a special-shaped tube; the cross section forms of the inner sleeve and the outer sleeve of the double-sleeve connecting piece are consistent with the cross section form of the FRP sectional material; the section size and the wall thickness range of the FRP section are determined according to the load bearing capacity of the truss structure.

In the FRP-corrosion-resistant wood composite truss structure, the corrosion-resistant wood rod is a wood rod member and comprises various bamboo materials, the axial direction of the wood rod member is along the grain direction, and the cross section of the wood rod member is any one of circular, oval, square, rectangular, polygonal and special-shaped; the geometric form of the section of the metal sleeve is consistent with that of the section of the anti-corrosion wood rod; the size of the cross section of the anti-corrosion wood pole is determined according to the load bearing size of the truss structure.

According to the FRP-anticorrosion wood combined truss structure, the FRP-anticorrosion wood combined truss structure is in a triangular truss, a trapezoidal truss or a polygonal truss in a geometric form.

The utility model has the beneficial effects that:

1. the FRP profile with light dead weight, good chemical corrosion resistance, good insulating property, simple forming process and high tensile strength and the renewable and environment-friendly anticorrosive wood rod are combined into the truss structure in a specific node connection mode, so that the mechanical properties of all materials are fully realized, the consumption of metal materials in the whole truss structure is low, and the consumption of non-renewable energy sources is reduced; the FRP-anticorrosion wood composite truss integrally shows the mechanical characteristics of light weight and high strength, the anti-seismic performance and the fatigue resistance of the FRP-anticorrosion wood composite truss are greatly improved compared with a steel truss and a reinforced concrete truss, and the FRP-anticorrosion wood composite truss has more obvious advantages when being used in a large-span structure.

2. The positions of the nodes connected by the components of the truss can be ideally hinged, the truss is simple in form and easy to process, factory prefabrication and field assembly can be realized, the construction period is greatly shortened, the later maintenance cost is low, and the building industrialization concept advocated in China is met. Meanwhile, the composite truss structure is high in designability, the using amount of the FRP sectional material can be increased by optimizing the layout form of the tension and compression rod pieces in the truss, and the composite truss structure has profound significance for popularization and application of FRP.

Drawings

FIG. 1 is a perspective view of an FRP/anticorrosive wood composite truss structure according to the present invention.

FIG. 2 is a schematic view of a tension member of an FRP profile according to the present invention.

Fig. 3 is a schematic view of the anti-corrosion wood pole compression member of the present invention.

Fig. 4 is a schematic view of the structure of the truss node part.

Fig. 5 is a perspective view of a truss joint of the present invention.

Fig. 6 is a perspective view of a portion of a metal node a according to the present invention.

Fig. 7 is a partial perspective view of a metal node B according to the present invention.

FIG. 8 is a perspective view of a dual socket connection of the present invention.

FIG. 9 is a front view of a dual socket connection of the present invention.

FIG. 10 is a top view of a dual socket connection according to the present invention.

FIG. 11 is a perspective view of the box connector of the present invention.

FIG. 12 is a front view of a box connector of the present invention.

Detailed Description

The utility model is further described below with reference to the figures and examples.

As shown in fig. 1-3, an FRP-corrosion-resistant wood composite truss structure includes an FRP section tension member 1, a corrosion-resistant wood rod compression member 2, and a metal node 3; the FRP profile tension member 1 comprises an FRP profile and double-sleeve connecting pieces 4 positioned at two ends of the FRP profile, the anticorrosive wood rod compression-resistant member 2 comprises an anticorrosive wood rod and sleeve connecting pieces 5 positioned at two ends of the anticorrosive wood rod, and the plurality of FRP profile tension members 1 and the anticorrosive wood rod compression-resistant members 2 are ideally hinged through metal nodes 3 to form an FRP-anticorrosive wood combined truss structure; contact interfaces of the FRP profile tension member 1, the anticorrosive wood rod compression-resistant member 2 and the metal node 3 can be designed into contact surfaces with certain friction coefficients according to requirements.

As shown in fig. 8-10, the double-sleeve connector 4 includes an inner sleeve 12, an outer sleeve 13 and an end ball, the inner sleeve 12 is sleeved in the outer sleeve 13, a gap between the inner sleeve 12 and the outer sleeve 13 is used for inserting the FRP profile, a plurality of ribs 15 protruding from the tube wall are uniformly distributed on the outer wall of the inner sleeve 12 and the inner wall of the outer sleeve 13 along the axial direction, and are used for fixing the position of the FRP profile in the double-sleeve connector 4, so as to ensure the thickness of the glue layer when the FRP profile is glued to the double-sleeve connector 4, and avoid local weakness; the FRP profile is inserted into a gap between the inner sleeve 12 and the outer sleeve 13 and is filled with epoxy resin glue between the inner sleeve 13 and the outer sleeve 13 for bonding to form an FRP profile tension member 1; one end of the inner sleeve 12 and one end of the outer sleeve 13 are connected together and connected with the end ball through a cylindrical rod, metal ribs 14 are uniformly distributed at the joint of the cylindrical rod and the outer sleeve 13 along the radial direction of the cylindrical rod, the distribution range of the metal ribs 14 is the contact surface between the central position of the cylindrical rod and the outer sleeve 13 and the cylindrical rod, the metal ribs 14 are triangular, the length of a right-angle short side is the distance from the outer wall of the outer sleeve 13 to the outer wall of the cylindrical rod, and the length of a right-angle long side is 0.5-1 time of the axial length of the cylindrical rod; the end ball body is provided with a through hole 11 which can be arranged in a bolt 7 of the metal node A part to realize the connection among a plurality of components.

The outer diameter of the FRP section is smaller than the inner diameter of the outer sleeve 13, the difference range is 0.1-5mm, the inner diameter of the FRP section is larger than the outer diameter of the inner sleeve 12, and the difference is consistent with the difference between the outer diameter of the FRP section and the inner diameter of the outer sleeve 13; the axial length of the outer sleeve 13 is more than 1 time of the outer diameter of the FRP section, and the length of the inner sleeve 12 is more than 1.5 times of the length of the outer sleeve 13; the inner sleeve 12 and the outer sleeve 13 are in variable cross-section forms with large wall thickness at the end close to the end ball body and small wall thickness at the other end, the maximum wall thickness is more than 1 time of the wall thickness of the FRP section, and the value range of the minimum wall thickness is less than 0.5 time of the maximum wall thickness. The outer diameter of the cylindrical rod is less than 1 time of the diameter of the end ball.

As shown in fig. 11 and 12, the sleeve connector 5 includes a metal sleeve, a radial reinforcing section 19, bolts 18, a cylinder 20 and a sphere at an end, the raised radial reinforcing section 19 is disposed in the middle of the outer wall of the metal sleeve, a plurality of threaded holes are uniformly distributed on the radial reinforcing section 19 along the radial direction, the holes of the threaded holes point to the centroid direction of the section, the bolts 18 matched with the threaded holes are installed in the threaded holes for applying a pre-tightening force to the anti-corrosion wood rods inserted into the metal sleeve, and the number of the radially distributed bolts 18 is determined according to the cross-sectional size of the anti-corrosion wood rods; the anticorrosion wood compression-resistant member is formed by inserting an anticorrosion wood rod into a metal sleeve and combining the anticorrosion wood rod and the metal sleeve by tightening a bolt 18; the end part of the metal sleeve is connected with an end part ball through a cylinder 20, stiffening ribs 16 are uniformly distributed at the joint of the cylinder 20 and the sleeve along the radial direction of the cylinder 20, the distribution range of the stiffening ribs 16 is from the central position of the cylinder 20 to the contact surface of the sleeve and the cylinder 20, the shape of the stiffening ribs 16 is triangular, the length of a short right-angle side is the distance from the outer wall of the sleeve to the outer wall of the cylinder 20, and the long right-angle side is 0.5-1 time of the axial length of the cylinder 20; the end ball is provided with a through hole 17 which can be inserted into a bolt of the metal node A part to realize the connection among a plurality of components.

The outer diameter of the anti-corrosion wood rod is consistent with the inner diameter of the metal sleeve; the length of the metal sleeve is more than 1 time of the outer diameter of the anti-corrosion wood rod, and the wall thickness of the metal sleeve is more than 0.05 time of the outer diameter of the anti-corrosion wood rod; the protruding thickness of the radial strengthening section 19 is the same as the diameter of the bolt 18, and the axial width of the radial strengthening section 19 is more than 2 times of the diameter of the bolt 18.

As shown in fig. 4 to 7, the metal node 3 has a plurality of connection ports, and the number, shape, and size of the connection ports are determined according to the size, arrangement form, and shape of the truss structure. The metal node 3 is divided into a part A3A and a part B3B, both of which are in a step shape with thin edges and thick middle and are integrally formed; a. Spherical grooves 6 for placing end balls or end balls are distributed on the two parts B, cylindrical bolts are distributed on the part A3A, the bolts are divided into a first class bolt 7 and a second class bolt 8, threads are turned on the end parts of the second class bolts 8, the number of the first class bolts 7 is consistent with the number of connecting members at the metal node 3, and the single second class bolt 8 is arranged at the centroid position of the part A3A of the metal node; cylindrical non-through holes 9 and through holes 10 which are matched with the cylindrical bolts of the part A3A in size are distributed on the part B of the metal node 3B, the part A3A type bolts 7 are inserted into the part B3B non-through holes 9, the part A3A type bolts 8 are inserted into the part B3B through holes 10, and the end parts of the type B bolts 8 which are provided with threads are screwed into the matched nuts 8A, so that the two parts of the metal node A, B form a whole.

The FRP profile is formed by pultrusion, is a solid profile, and has a cross section in the form of any one of a circular tube, an elliptical tube, a square tube, a polygonal tube and a special-shaped tube; the cross section forms of the inner sleeve 13 and the outer sleeve 13 of the double-sleeve connecting piece 4 are consistent with the cross section form of the FRP sectional material; the section size and the wall thickness range of the FRP section are determined according to the load bearing capacity of the truss structure.

The anti-corrosion wood rod is a solid or hollow wood rod piece and comprises various bamboo materials, the axial direction of the anti-corrosion wood rod is along the grain direction, and the cross section of the anti-corrosion wood rod is any one of a circle, an ellipse, a square, a rectangle, a polygon and a special shape; the geometric form of the section of the metal sleeve is consistent with that of the section of the anti-corrosion wood rod; the size of the cross section of the anti-corrosion wood pole is determined according to the load bearing size of the truss structure.

The arrangement form of the FRP profile tension member 1 and the anticorrosive wood rod compression-resistant member 2 is determined during the design of a truss structure. The FRP-anticorrosion wood composite truss structure can be a triangular truss, a trapezoidal truss and a polygonal truss in a geometric form. Before the members of the truss structure are distributed, the stress condition of each member when the truss is subjected to vertically uniform load or midspan vertical concentrated load is calculated, the tension members are distributed into FRP (fiber reinforced plastic) sections, the compression members are distributed into anticorrosion wood poles, and the section sizes of the FRP sections and the anticorrosion wood poles are designed according to the integral stress of the truss; the FRP-anticorrosion wood combined truss structure can be assembled into a space truss structure.

Claims

1. An FRP-anticorrosion wood composite truss structure is characterized by comprising an FRP section tension member, an anticorrosion wood rod compression member and a metal node; the FRP profile tension member comprises an FRP profile and double-sleeve connecting pieces positioned at two ends of the FRP profile, the anticorrosive wood rod compression-resistant member comprises an anticorrosive wood rod and sleeve connecting pieces positioned at two ends of the anticorrosive wood rod, and the FRP profile tension members and the anticorrosive wood rod compression-resistant members are connected through metal nodes to form the FRP-anticorrosive wood combined truss structure.

2. The FRP-anticorrosion wood composite truss structure as claimed in claim 1, wherein the double-sleeve connecting member is integrally formed and comprises an inner sleeve, an outer sleeve and an end ball, the inner sleeve is sleeved in the outer sleeve, a gap between the inner sleeve and the outer sleeve is used for inserting the FRP profile, a plurality of ribs protruding from the tube wall are uniformly distributed on the outer wall of the inner sleeve and the inner wall of the outer sleeve along the axial direction and used for fixing the position of the FRP profile in the double-sleeve connecting member, the FRP profile is inserted into the gap between the inner sleeve and the outer sleeve and is bonded by pouring epoxy resin glue between the inner sleeve and the outer sleeve to form the FRP profile tension member; one end of the inner sleeve and one end of the outer sleeve are connected together and are connected with the end ball body through the cylindrical rod, metal ribs are uniformly distributed on the connecting position of the cylindrical rod and the outer sleeve along the radial direction of the cylindrical rod, and a through hole is formed in the end ball body.

3. The FRP-corrosion-resistant wood composite truss structure as claimed in claim 2, wherein the outer diameter of the FRP section is smaller than the inner diameter of the outer sleeve by a difference range of 0.1-5mm, the inner diameter of the FRP section is larger than the outer diameter of the inner sleeve by a difference which is consistent with the difference between the outer diameter of the FRP section and the inner diameter of the outer sleeve; the axial length of the outer sleeve is more than 1 time of the outer diameter of the FRP section, and the length of the inner sleeve is more than 1.5 times of the length of the outer sleeve; the inner sleeve and the outer sleeve are in variable cross-section forms with large wall thickness at the end close to the end ball body and small wall thickness at the other end, the maximum wall thickness is more than 1 time of the wall thickness of the FRP section, and the value range of the minimum wall thickness is less than 0.5 time of the maximum wall thickness.

4. The FRP-anticorrosion wood composite truss structure as claimed in claim 2, wherein the sleeve connecting member is integrally formed and comprises a metal sleeve, a radial reinforcing section, a bolt, a cylinder and a spherical end, the middle part of the outer wall of the metal sleeve is provided with the raised radial reinforcing section, a plurality of threaded holes are uniformly distributed on the radial reinforcing section along the radial direction, the holes of the threaded holes point to the centroid direction of the section, the threaded holes are provided with the bolts matched with the threaded holes for applying a pre-tightening force to anticorrosion wood rods inserted into the metal sleeve, and the radial distribution number of the bolts is determined according to the section size of the anticorrosion wood rods; the anti-corrosion wood rod compression-resistant component is formed by inserting an anti-corrosion wood rod into a metal sleeve and tightening a bolt; the end part of the metal sleeve is connected with an end part ball through a cylinder, stiffening ribs are uniformly distributed on the connection part of the cylinder and the sleeve along the radial direction of the cylinder, and a through hole is formed in the end part ball.

5. The FRP-corrosion-resistant wood composite truss structure as claimed in claim 4, wherein the outer diameter of the corrosion-resistant wood pole is consistent with the inner diameter of the metal sleeve; the length of the metal sleeve is more than 1 time of the outer diameter of the anti-corrosion wood rod, and the wall thickness of the metal sleeve is more than 0.05 time of the outer diameter of the anti-corrosion wood rod; the protruding thickness of radial reinforcement section is the same with the bolt diameter, and radial reinforcement section extends axial width and is 2 times of bolt diameter.

6. The FRP-anticorrosion wood composite truss structure as claimed in claim 4, wherein the metal node is divided into A, B two parts, each of which is in the shape of a ladder with thin edge and thick middle, and is integrally formed; A. the part B is provided with spherical grooves for placing end balls or end spheres, the part A is provided with cylindrical bolts, the bolts are divided into a first class bolt and a second class bolt, the end part of the second class bolt is provided with threads, the number of the first class bolts is consistent with the number of connecting members at the metal node, and a single second class bolt is arranged at the centroid position of the part A of the metal node; and cylindrical non-through holes and through holes matched with the cylindrical bolts of the part A in size are distributed on the part B of the metal node.

7. The FRP-corrosion-resistant wood composite truss structure as claimed in claim 4, wherein the FRP section is formed by pultrusion, and the section form is any one of a circular tube, an elliptical tube, a square tube, a polygonal tube and a special-shaped tube; the cross section forms of the inner sleeve and the outer sleeve of the double-sleeve connecting piece are consistent with the cross section form of the FRP sectional material; the section size and the wall thickness range of the FRP section are determined according to the load bearing capacity of the truss structure.

8. The FRP-anticorrosion wood composite truss structure as claimed in claim 4, wherein the anticorrosion wood bars are wood bars, including various bamboo materials, the axial direction of the wood bars is along the grain direction, and the cross section of the wood bars is any one of circular, oval, square, rectangular, polygonal and irregular shapes; the geometric form of the section of the metal sleeve is consistent with that of the section of the anti-corrosion wood rod; the size of the cross section of the anti-corrosion wood pole is determined according to the load bearing size of the truss structure.

9. The FRP-anticorrosion wood composite truss structure as claimed in claim 1, wherein the FRP-anticorrosion wood composite truss structure is in the geometrical form of a triangular truss, a trapezoidal truss or a polygonal truss.