Large-span energy dissipation engineering bamboo-wood-steel net rack combined structure

Abstract

The application provides a large-span energy dissipation engineering bamboo-wood-steel grid combined structure, which comprises an engineering bamboo-wood hollow composite roof panel, a steel grid and a plurality of engineering bamboo columns; the steel grid is fixed to the bottom surface of the engineering bamboo-wood hollow composite roof panel, and the bottom of the four corners of the steel grid is fixed to the engineering bamboo columns; the steel grid is respectively provided with a high viscous energy dissipation structure at the connection points adjacent to the steel grid and the engineering bamboo columns. The large-span energy dissipation engineering bamboo-wood-steel grid combined structure can fully exert the mechanical performance advantages of engineering bamboo, wood and steel, realize the application of engineering bamboo in large-span space structures, and avoid the overall collapse of the structure caused by the compression damage of the web member at the key position by arranging energy dissipation members in the key compression bar area.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of structural engineering, in particular to a large-span energy-consuming engineering bamboo-wood-steel grid composite structure. BACKGROUND

[0002] China is the country with the most abundant bamboo resources in the world, and the bamboo forest area accounts for about 19% of the total bamboo forest area in the world. Bamboo has the advantages of being renewable and biodegradable, high strength-to-weight ratio, lightweight and earthquake-resistant, and low thermal conductivity. Under the background of developing green and environmentally friendly ecological buildings and building industrialization, how to reasonably utilize this natural material and let bamboo buildings play a unique role in sustainable urban and rural construction has become a new exploration direction. With the continuous progress of engineering bamboo processing technology, the utilization of bamboo has been broken through. Compared with round bamboo, the physical and mechanical properties and durability of engineering bamboo have been improved, and the material defects and size variability of round bamboo have been overcome. There is great development space for engineering bamboo to be used in load-bearing structures.

[0003] Engineering bamboo has excellent mechanical properties in the direction of the fibers due to its unidirectional nature, and its strength-to-weight ratio is even higher than that of steel. However, its strength in the transverse direction is very low, which limits its use in bidirectional bending members and requires certain technical treatment. In addition, due to the limitation of the elastic modulus of the material, the cross section of the engineering bamboo bending member is generally controlled by deformation, and the material strength cannot be fully utilized. It is also difficult to use in large-span space structures. By arranging the engineering bamboo layer plate orthogonally and combining it with the wood keel to form a hollow plate member, the structural self-weight can be reduced while ensuring the cross-sectional stiffness of the member. Meanwhile, the middle wood keel can be made of fast-growing wood with relatively low strength. By further combining with materials such as steel, a large-span space structure can be made, which can fully utilize the mechanical properties of various materials and improve the utilization rate of materials.

[0004] On the other hand, for the combined space structure with local steel grid, under the action of sudden accidental loads such as earthquakes, the key compression members are prone to failure, which in turn leads to the continuous failure of other members or nodes, causing the overall collapse of the structure. When small slender steel members are connected with engineering bamboo members with large stiffness, the difference in stiffness between the members can exacerbate the failure of the key compression steel members in the key area. Therefore, it is necessary to develop a protection mechanism to prevent the premature failure of local steel members in the combined structure composed of engineering bamboo and steel, and to set up energy-consuming members in the key area to prevent the overall collapse of the structure caused by the failure of key members in the key area, and to improve the overall disaster prevention ability of the structure. SUMMARY

[0005] In view of the above deficiencies in the prior art, the present application provides a large-span energy dissipation engineering bamboo-wood-steel grid combined structure, which can fully utilize the mechanical performance advantages of engineering bamboo, wood and steel, realize the application of engineering bamboo in large-span space structures, and avoid the overall collapse of the structure caused by the compression failure of the web member at the key position by arranging energy dissipation members at the key compression member area.

[0006] To achieve the above-mentioned purpose, the present application provides a large-span energy dissipation engineering bamboo-wood-steel grid combined structure, which comprises an engineering bamboo-wood hollow composite roof panel, a steel grid and a plurality of engineering bamboo columns; the steel grid is fixed to the bottom surface of the engineering bamboo-wood hollow composite roof panel, and the bottom of the four corners of the steel grid is fixed to the engineering bamboo columns; the steel grid is provided with a high-viscosity energy dissipation structure at the connection point adjacent to the steel grid and the engineering bamboo column.

[0007] Preferably, the engineering bamboo-wood hollow composite roof panel comprises an upper engineering bamboo layer, a lower engineering bamboo layer and a plurality of glued wood keels, the glued wood keels are vertically and spacedly arranged between the upper engineering bamboo layer and the lower engineering bamboo layer and are glued and connected with the upper engineering bamboo layer and the lower engineering bamboo layer; the upper engineering bamboo layer and the lower engineering bamboo layer each comprise two orthogonally arranged and glued engineering bamboo boards; the upper engineering bamboo layer, the lower engineering bamboo layer and the glued wood keels form a hollow structure in the middle of the engineering bamboo-wood hollow composite roof panel.

[0008] Preferably, the steel grid comprises a plurality of round steel pipe lower chords, a plurality of round steel pipe web members and a plurality of T-shaped steel upper chords; the T-shaped steel upper chords are fixed to the bottom surface of the engineering bamboo-wood hollow composite roof panel; the round steel pipe lower chords are fixed below the T-shaped steel upper chords through the round steel pipe web members; the round steel pipe lower chords, the round steel pipe web members and the T-shaped steel upper chords cooperate to form a grid structure.

[0009] Preferably, the T-shaped steel upper chords are connected and fixed with the engineering bamboo-wood hollow composite roof panel through a plurality of self-tapping screws; the self-tapping screws are vertically punched into the engineering bamboo-wood hollow composite roof panel from the underside of the flange of the T-shaped steel upper chord, and the flange of the T-shaped steel upper chord is pre-opened with a through hole at the position where the self-tapping screw is arranged.

[0010] Preferably, the top of the engineering bamboo column is provided with a cross-shaped groove, a cross-shaped steel filler plate is partially inserted into the cross-shaped groove and is screw-connected and fixed with the engineering bamboo column through a bolt; the cross-shaped steel filler plate and the engineering bamboo column are pre-opened with bolt holes at the position where the bolt is arranged; the top of the cross-shaped steel filler plate is welded with a steel ball; the round steel pipe lower chords and the round steel pipe web members at the four corners of the steel grid are connected and fixed with the steel ball.

[0011] Preferably, the high viscous energy consumption structure comprises several high viscous energy consumption segments; the middle part of the round steel pipe web member connected with the steel ball at the four corners of the steel net rack is provided with the high viscous energy consumption segment.

[0012] Preferably, the round steel pipe web member connected with the steel ball comprises two web member segments, and the high viscous energy consumption segment is connected between the two web member segments; the high viscous energy consumption segment comprises two energy consumption end plates, an energy consumption rod, a steel sleeve and two high viscous elastic rubbers; the energy consumption end plates are fixed at the adjacent ends of the two web member segments respectively; the energy consumption rod is connected between the two energy consumption end plates; the steel sleeve is wrapped outside the energy consumption rod, the inner diameter of the steel sleeve is the same as the diameter of the energy consumption rod, and the length of the steel sleeve is 5-10 mm less than the length of the energy consumption rod; the gap between the steel sleeve and the energy consumption end plates is filled with the high viscous elastic rubber.

[0013] The present application has the following beneficial effects due to the adoption of the above technical scheme:

[0014] The present application can make full use of the mechanical performance advantages of high tensile strength of steel and good compression ductility of engineering bamboo, combine them to make large-span space structure, and improve the utilization rate of the two materials. The upper side engineering bamboo-wood hollow composite roof panel of the combined roof is formed by orthogonal gluing of engineering bamboo layers and laminating with glued wood keel to form a hollow panel component, which can ensure the cross-sectional stiffness of the component while reducing the self weight of the structure. The middle engineering bamboo layer can be made of fast-growing wood with relatively low strength, solving the problem that the fast-growing wood with relatively low strength cannot meet the load-bearing requirements of the structure when used alone. The T-shaped steel top chord of the steel net rack is connected and fixed with the engineering bamboo-wood roof panel, solving the problem of instability of the compression steel component. At the same time, the high viscous energy consumption segment is arranged in the round steel pipe web member at the corner, which can avoid compression damage of the web member at the key position and cause the overall collapse of the structure, improving the overall disaster prevention ability of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the first perspective of the large-span energy consumption engineering bamboo-wood steel net rack combined structure of the embodiment of the present application.

[0016] Figure 2 It is a structural schematic diagram of the second perspective of the large-span energy consumption engineering bamboo-wood steel net rack combined structure of the embodiment of the present application.

[0017] Figure 3 It is a sectional view of the engineering bamboo-wood hollow composite roof panel of the embodiment of the present application.

[0018] Figure 4 It is a front view of the engineering bamboo-wood hollow composite roof panel and the steel net rack of the embodiment of the present application.

[0019] Figure 5This is a schematic diagram of the top connection structure of the engineering bamboo column according to an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the high-viscosity energy-consuming section in an embodiment of the present invention. Detailed Implementation

[0021] The following is based on the attached diagram. Figures 1-6 The present invention provides preferred embodiments and describes them in detail to enable a better understanding of the functions and features of the invention.

[0022] Please see Figures 1-6 An embodiment of the present invention provides a large-span energy-consuming engineering bamboo-wood steel grid composite structure, comprising an engineering bamboo-wood hollow composite roof panel 1, a steel grid 2, and multiple engineering bamboo columns 3; the steel grid 2 is fixed to the bottom surface of the engineering bamboo-wood hollow composite roof panel 1, and the bottom of the four corners of the steel grid 2 is erected and fixed on the engineering bamboo columns 3; a high-viscosity energy-consuming structure is respectively provided at the connection point of the steel grid 2 and the engineering bamboo columns 3.

[0023] In this embodiment, the dimensions of the engineering bamboo column 3 are 300mm×300mm, and the bidirectional axial spacing is 9m.

[0024] The engineered bamboo-wood hollow composite roof panel 1 includes an upper engineered bamboo layer 11, a lower engineered bamboo layer 12, and multiple glued laminated timber joists 13. The glued laminated timber joists 13 are arranged vertically and spaced between the upper engineered bamboo layer 11 and the lower engineered bamboo layer 12 and are glued to the upper engineered bamboo layer 11 and the lower engineered bamboo layer 12. The upper engineered bamboo layer 11 and the lower engineered bamboo layer 12 each include two orthogonally arranged and glued engineered bamboo panels. The upper engineered bamboo layer 11 and the lower engineered bamboo layer 12, together with the glued laminated timber joists 13, form a hollow structure in the middle of the engineered bamboo-wood hollow composite roof panel 1.

[0025] In this embodiment, the dimensions of the engineered bamboo-wood hollow composite roof panel 1 are 9300mm × 9300mm. The thickness of the engineered bamboo panel is 10mm. The cross-sectional dimensions of the glued laminated timber are 20mm × 20mm. The total thickness of the engineered bamboo-wood hollow composite roof panel 1 is 80mm.

[0026] The steel space frame 2 includes multiple round steel pipe lower chords 21, multiple round steel pipe web members 22, and multiple T-shaped steel upper chords 23, all made of Q235B grade steel. The T-shaped steel upper chords 23 are fixed to the bottom surface of the engineered bamboo and wood hollow composite roof panel 1. The round steel pipe lower chords 21 are fixed to the bottom of the T-shaped steel upper chords 23 through the round steel pipe web members 22. The round steel pipe lower chords 21, round steel pipe web members 22, and T-shaped steel upper chords 23 work together to form a space frame structure.

[0027] The lower chord of the round steel pipe 21 adopts Hollow round steel pipe fabrication; round steel pipe web member 22 adopts The hollow circular steel pipe is made; the flange section size of the T-shaped upper chord 23 is 100mm*3mm, and the web section size is 50mm*4mm, which is vertically welded by two steel plates.

[0028] The T-shaped upper chord 23 is connected and fixed with the engineering bamboo-wood hollow composite roof panel 1 through a plurality of self-tapping screws 4; the self-tapping screws 4 are vertically punched into the engineering bamboo-wood hollow composite roof panel 1 from the lower side of the flange of the T-shaped upper chord 23, and the flange of the T-shaped upper chord 23 is pre-opened through holes at the position where the self-tapping screws 4 are arranged.

[0029] The diameter of the self-tapping screw 4 is 6mm, and the length is 60mm; the self-tapping screws 4 are arranged along the T-shaped upper chord 23, and in each grid unit of the steel net rack 2, 3 self-tapping screws 4 are uniformly arranged along each edge, and a total of 12 self-tapping screws 4 are arranged in each grid unit.

[0030] A cross-shaped slot is arranged at the top of the engineering bamboo column 3, a cross-shaped steel filler plate 5 is partially inserted into the cross-shaped slot and is screw-connected and fixed with the engineering bamboo column 3 through a bolt 6; the cross-shaped steel filler plate 5 and the engineering bamboo column 3 are pre-opened bolt holes at the position where the bolt 6 is arranged; a steel ball 7 is welded at the top of the cross-shaped steel filler plate 5; the lower chord 21 and the web member 22 of the circular steel pipe at the four corners of the steel net rack 2 are connected and fixed with the steel ball 7.

[0031] In the embodiment, the cross-shaped steel filler plate 5 is 10mm thick, which is welded by a 300mm wide steel plate and two 145mm wide steel plates; the cross-shaped slot is 12mm thick, which is used for inserting the cross-shaped steel filler plate 5; the diameter of the bolt 6 is 18mm; the diameter of the bolt hole is 20mm; the diameter of the steel ball 7 is 150mm, which is welded and fixed with the corresponding circular steel pipe lower chord 21 and the circular steel pipe web member 22.

[0032] The high viscous energy dissipation structure includes a plurality of high viscous energy dissipation segments 8; the middle part of the circular steel pipe web member 22 connected with the steel ball 7 at the four corners of the steel net rack 2 is provided with the high viscous energy dissipation segment 8.

[0033] The circular steel pipe web member 22 connected with the steel ball 7 includes two web member segments, and the high viscous energy dissipation segment 8 is connected between the two web member segments; the high viscous energy dissipation segment 8 includes two energy dissipation end plates 81, an energy dissipation rod 82, a steel sleeve 83 and two high viscous elastic rubbers 84; the energy dissipation end plates 81 are respectively fixed at the adjacent ends of the two web member segments; the energy dissipation rod 82 is connected between the two energy dissipation end plates 81; the steel sleeve 83 is wrapped outside the energy dissipation rod 82, the inner diameter of the steel sleeve 83 is the same as the diameter of the energy dissipation rod 82, and the length of the steel sleeve 83 is 5-10mm shorter than the length of the energy dissipation rod 82; the gap between the steel sleeve 83 and the energy dissipation end plate 81 is filled with the high viscous elastic rubber 84.

[0034] In the embodiment, the energy dissipation end plate 81 is 10 mm thick; the energy dissipation rod 82 is 36 mm in diameter and 150 mm in length, and the energy dissipation end plate 81 and the energy dissipation rod 82 are made of aluminum alloy; and the steel sleeve 83 is 140 mm long.

[0035] When the structure bears accidental load to cause the corner circular steel pipe web member 22 to bear large pressure, the energy dissipation rod 82 in the circular steel pipe web member 22 extrudes the energy dissipation end plate 81, and energy is dissipated through the shear deformation of the energy dissipation end plate 81; when the deformation of the energy dissipation end plate 81 caused by the extrusion of the energy dissipation rod 82 is large, the high-viscosity elastic rubber 84 also generates a certain compression deformation to dissipate energy, and at the same time, the steel sleeve 83 outside the energy dissipation rod 82 participates in compression under the extrusion of the high-viscosity elastic rubber 84, avoids the instability damage of the energy dissipation rod 82 in the middle, and ensures that the web member will not be damaged even in the case of receiving large pressure and generating large compression deformation, thereby avoiding the overall structure from collapsing by protecting the key compression member.

[0036] The large-span energy dissipation engineering bamboo-wood-steel net rack combined structure of the embodiment of the application makes full use of the respective mechanical property advantages of engineering bamboo, wood and steel, and the orthogonally arranged engineering bamboo layer plate and the glued wood keel 13 can effectively reduce the self weight of the structure while realizing the bidirectional stress performance of the roof panel, improve the material utilization rate, are suitable for large-span space structures, and have good development and application prospects in the assembled modern bamboo-wood structure building.

[0037] The above embodiment of the application is described in detail in combination with the drawings, and those skilled in the art can make various changes to the application according to the above description. Therefore, some details in the embodiment should not constitute a limitation on the application, and the protection scope of the application will be defined by the appended claims.

Claims

1. A bamboo-wood-steel space frame composite structure for large-span energy-consuming engineering projects, characterized in that, The system includes an engineered bamboo-wood hollow composite roof panel (1), a steel mesh frame (2), and multiple engineered bamboo columns (3); the steel mesh frame (2) is fixed to the bottom surface of the engineered bamboo-wood hollow composite roof panel (1), and the bottom of the four corners of the steel mesh frame (2) is erected and fixed on the engineered bamboo columns (3); a high-viscosity energy-dissipating structure is respectively provided at the connection point of the steel mesh frame (2) and the engineered bamboo columns (3); The steel space frame (2) includes multiple round steel pipe lower chords (21), multiple round steel pipe web members (22), and multiple T-shaped steel upper chords (23); the T-shaped steel upper chords (23) are fixed to the bottom surface of the engineering bamboo and wood hollow composite roof panel (1); the round steel pipe lower chords (21) are fixed to the bottom of the T-shaped steel upper chords (23) through the round steel pipe web members (22); the round steel pipe lower chords (21), the round steel pipe web members (22), and the T-shaped steel upper chords (23) cooperate to form a space frame structure; The engineered bamboo-wood hollow composite roof panel (1) includes an upper layer engineered bamboo panel (11), a lower layer engineered bamboo panel (12), and multiple glued laminated timber joists (13). The glued laminated timber joists (13) are arranged vertically and spaced between the upper layer engineered bamboo panel (11) and the lower layer engineered bamboo panel (12) and glued to the upper layer engineered bamboo panel (11) and the lower layer engineered bamboo panel (12). The upper layer engineered bamboo panel (11) and the lower layer engineered bamboo panel (12) each include two orthogonally arranged and glued engineered bamboo panels. The upper layer engineered bamboo panel (11) and the lower layer engineered bamboo panel (12) cooperate with the glued laminated timber joists (13) to form a hollow structure in the middle of the engineered bamboo-wood hollow composite roof panel (1). A cross-shaped groove is opened at the top of the engineering bamboo column (3), and a cross-shaped steel filler plate (5) is partially inserted into the cross-shaped groove and screwed to the engineering bamboo column (3) by bolts (6); a steel ball (7) is welded to the top of the cross-shaped steel filler plate (5). The high-viscosity energy-consuming structure includes several high-viscosity energy-consuming sections (8); the high-viscosity energy-consuming sections (8) are provided in the middle of the round steel pipe web members (22) that are connected to the steel balls (7) at the four corners of the steel grid frame (2). The circular steel tube web member (22) connected to the steel ball (7) includes two web member segments, and the high-viscosity energy-consuming segment (8) is connected between the two web member segments; the high-viscosity energy-consuming segment (8) includes two energy-consuming end plates (81), an energy-consuming rod (82), a steel sleeve (83) and two high-viscosity elastic rubbers (84); the energy-consuming end plates (81) are respectively fixed to the adjacent ends of the two web member segments; the energy-consuming rod (82) is connected between the two energy-consuming end plates (81); the steel sleeve (83) is wrapped around the energy-consuming rod (82), and the inner diameter of the steel sleeve (83) is the same as the diameter of the energy-consuming rod (82).

2. The bamboo-wood-steel space frame composite structure for large-span energy-consuming engineering projects according to claim 1, characterized in that, The T-shaped steel upper chord (23) is connected and fixed to the engineering bamboo and wood hollow composite roof panel (1) by a plurality of self-tapping screws (4); the self-tapping screws (4) are driven vertically into the engineering bamboo and wood hollow composite roof panel (1) from the lower side of the flange of the T-shaped steel upper chord (23), and the flange of the T-shaped steel upper chord (23) has a pre-drilled hole at the position where the self-tapping screws (4) are set.

3. The bamboo-wood-steel space frame composite structure for large-span energy-consuming engineering projects according to claim 1, characterized in that, The cross-shaped steel filler plate (5) and the engineering bamboo column (3) have pre-drilled bolt holes at the positions where the bolts (6) are set; the lower chord of the round steel pipe (21) and the web member of the round steel pipe (22) at the four corners of the steel grid frame (2) are connected and fixed to the steel ball (7).

4. The bamboo-wood-steel space frame composite structure for large-span energy-consuming engineering projects according to claim 1, characterized in that, The length of the steel sleeve (83) is 5-10 mm shorter than the length of the energy dissipation rod (82); the gap between the steel sleeve (83) and the energy dissipation end plate (81) is filled with the high viscoelastic rubber (84).

Images