Large-span steel-wood truss structure for roof

Abstract

The utility model relates to building structure technical field, specifically disclose a large-span steel wood truss structure for roof, include: end support block, it sets up in steel wood truss structure both ends, and is connected with building foundation structure, the end support block one side is arranged as the support of adapting with butt joint truss, and butt joint truss, standard truss and arc truss connection constitute truss main body structure, the support of end support block and the installation groove inlayed connection of butt joint truss one end. This large-span steel wood truss structure for roof, the inlayed connection cooperation structure of butt joint truss and end support block is filled with structure glue, utilizes the deformation adaptability of inlayed surface friction and glue, and the initial deformation difference of steel wood interface is buffered, and the node steel bar group of positioning frame one both sides is passed through the axial force transmission of the gripping force of steel bar and component, and positioning bolt one passes through radial constraint and limits lateral deformation, and the force flow interference is avoided by the staggered distribution of both, and stress concentration is reduced.

Description

Technical Field

[0001] This utility model relates to the field of building structure technology, specifically a large-span steel-wood truss structure for roofs. Background Technology

[0002] In modern architecture, large-span steel-wood truss structures are widely used in roof systems for large stadiums, convention centers, and other buildings due to the high strength of steel and the environmental friendliness and lightweight characteristics of wood. The demand for large-span spatial structures is increasing. Traditional single-material roof truss structures, such as pure wood structures, have good environmental protection and aesthetics, but the strength of wood is relatively low. Due to its own mechanical properties, it is difficult to meet the load-bearing requirements of large spans. Large-span applications require a large amount of wood, which is not only costly but may also put great pressure on forest resources. On the other hand, pure steel structures, although they have strong load-bearing capacity, have obvious limitations in appearance design in some scenarios with special requirements for building appearance.

[0003] While some existing steel-wood composite structures attempt to combine the advantages of both materials, they still have many problems in terms of joint connections, structural stability, and ease of construction. In particular, the joint connectors are relatively rough and too large, making it difficult to achieve lightweighting while ensuring the shear and bending resistance of the hinged joints. Furthermore, due to the contradiction between the anisotropy of wood and the isotropy of steel, stress concentration and deformation inconsistency are prone to occur in the joint area. Under the combined action of axial compression and bending shear, damage such as wood splitting and bolt preload loosening may occur. Utility Model Content

[0004] The purpose of this utility model is to provide a large-span steel-wood truss structure for roofs, in order to solve the problems mentioned in the background art, such as rough and oversized node connectors, difficulty in achieving lightweight while ensuring shear and bending resistance of hinged nodes, and stress concentration and deformation inconsistency in the node area due to the contradiction between the anisotropy of wood and the isotropy of steel.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a large-span steel-wood truss structure for roofs, including end support blocks, which are disposed at both ends of the steel-wood truss structure and connected to the building foundation structure. One side of the end support block is configured as a bracket adapted to the connecting truss, and the connecting truss, standard truss and arc truss are connected to form the main truss structure. The bracket of the end support block is fitted into the mounting groove at one end of the docking truss, and the connection between the end support block and the docking truss is penetrated by a threaded rod. The other end of the docking truss is engaged with the standard truss, and the standard truss is installed on both sides of the arc-shaped truss. A positioning frame is installed at the connection between the docking truss and the standard truss, and a positioning pin is inserted through each end of the positioning frame. The positioning frame has nodal steel reinforcement groups on both sides to connect the docking truss and the standard truss. The connection structure between the standard truss and the arc truss is the same as that between the butt truss and the standard truss, both consisting of a positioning pin, a set of node reinforcement bars, and a positioning frame.

[0006] By adopting the above technical solution, a compact design of the node is achieved, avoiding excessively rough connectors, while enhancing the node's shear and bending resistance, and reducing stress concentration and deformation inconsistency caused by the differences in the properties of steel and wood materials.

[0007] Preferably, the docking truss is connected to the supporting connection node 1 by bolts, and the supporting connection node 1 and the steel frame form a support part for connecting the building foundation structure.

[0008] By adopting the above technical solution, the stress on the nodes is further distributed, the overall stability of the structure is improved, the load on the main nodes is reduced, and it helps to achieve lightweighting.

[0009] Preferably, a positioning frame two is engaged at the connection between the standard truss and the arc truss, and a positioning pin two penetrates the positioning frame two.

[0010] The above technical solution enhances the shear resistance of the nodes, while the snap-fit ​​connection method makes the structure more compact and facilitates weight reduction.

[0011] Preferably, the arc-shaped truss is connected to the second supporting connection node by bolts, and the second supporting connection node and the steel frame form a support part connecting the building foundation structure.

[0012] By adopting the above technical solution, the stress on the curved parts is distributed, the stability of the large-span structure is improved, and the deformation of steel and wood materials is coordinated.

[0013] Preferably, the positioning frame has two sets of staggered through holes, and the two sets of through holes are respectively penetrated by the positioning pin and the node steel bar group.

[0014] By adopting the above technical solution, the staggered through hole setting allows the positioning pin and the node reinforcement group to bear the force independently, avoiding mutual interference, improving the shear and bending resistance of the node, and optimizing the node size to achieve lightweighting.

[0015] Preferably, the second positioning pin is misaligned with the node reinforcement group inside the standard truss and the arc truss.

[0016] By adopting the above technical solution, the positioning pin 2 is misaligned with the node reinforcement group to avoid force transmission interference, enhance the stress rationality of the connection node between the standard truss and the curved truss, and reduce stress concentration.

[0017] Preferably, the supporting connection node one and supporting connection node two have the same structure, and both supporting connection node one and supporting connection node two are provided with a frame at their top ends that connects to the steel frame.

[0018] The above technical solution facilitates standardized production and installation, reduces costs, and the unified auxiliary support structure ensures the consistency of force transmission and improves the overall structural coordination.

[0019] Compared with the prior art, the beneficial effects of this utility model are: the large-span steel-wood truss structure for roofs: 1. The positioning frame adopts a steel frame structure, whose dimensions are precisely matched with the cross-section of the connecting truss and standard truss, avoiding redundant dimensions. The positioning pin and the node reinforcement group are divided into two sets of pre-set staggered through holes, so that the positioning pin mainly bears the shear force and the node reinforcement group mainly bears the tensile force. While ensuring the shear and bending resistance of the hinged node, the overall size of the node is reduced, achieving lightweight. The supporting connection node one and the supporting connection node two are precisely connected to the truss with bolts, optimizing the shape and area of ​​the node. 2. The interlocking connection between the truss and the end support block is filled with structural adhesive. The friction of the interlocking surface and the deformation adaptability of the adhesive are used to buffer the initial deformation difference of the steel-wood interface. The node steel bars on both sides of the positioning frame transmit axial force through the gripping force between the steel bars and the components. At the same time, the positioning pin restricts lateral deformation through radial constraint. The staggered distribution of the two avoids force flow interference and reduces stress concentration. 3. The curved structure design of the curved truss can distribute the roof load along the curve to the standard trusses on both sides. Combined with the auxiliary support system formed by the support connection node 1, support connection node 2 and the steel frame, a multi-point stress mode is formed, which reduces the load pressure of a single node. Furthermore, the positioning frame 2 and positioning pin 2 at the connection between the standard truss and the curved truss further disperse local stress through staggered setting, so that the deformation of the steel and wood node is more coordinated when bearing composite loads. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of this utility model; Figure 2 This is a schematic diagram of the overall internal three-dimensional structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the installation of the docking truss, standard truss, and arc truss of this utility model; Figure 4 This is a three-dimensional structural diagram showing the disassembled form of the docking truss, standard truss, and arc truss of this utility model; Figure 5 This is a three-dimensional structural diagram of the positioning frame 1, the positioning pin 2, and the positioning frame 2 of this utility model. Figure 6 This is a schematic diagram of the three-dimensional structure for the installation of the standard truss and positioning frame of this utility model.

[0021] In the figure: 1. End support block; 2. Connecting truss; 3. Standard truss; 4. Curved truss; 5. Positioning pin one; 6. Node reinforcement group; 7. Positioning frame one; 8. Positioning pin two; 9. Positioning frame two; 10. Supporting connection node one; 11. Supporting connection node two. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-6 This utility model provides a technical solution: a large-span steel-wood truss structure for roofs, including end support blocks 1, connecting trusses 2, standard trusses 3, arc trusses 4, positioning pins 5, node steel reinforcement groups 6, positioning frames 7, positioning pins 8, positioning frames 9, supporting connection nodes 10 and 11. Among them, the end support block 1 is set at both ends of the steel-wood truss structure and connected to the building foundation structure. One side of the end support block 1 is set as a bracket adapted to the docking truss 2, and the docking truss 2, the standard truss 3 and the arc truss 4 are connected to form the main truss structure. The bracket of the end support block 1 is fitted into the mounting groove at one end of the docking truss 2, and the connection between the end support block 1 and the docking truss 2 is penetrated by a threaded rod. The other end of the docking truss 2 is engaged with the standard truss 3, and the standard truss 3 is installed on both sides of the arc truss 4. A positioning frame 7 is installed at the connection between the docking truss 2 and the standard truss 3. Both ends of the positioning frame 7 are penetrated by a positioning pin 5. The positioning frame 7 has a set of node steel bars 6 on both sides to connect the docking truss 2 and the standard truss 3. The docking truss 2 is connected to the supporting connection node 10 by bolts. The supporting connection node 10 and the steel frame form a support part to connect the building foundation structure. The supporting connection node 10 and the supporting connection node 21 have the same structure. The top of the supporting connection node 10 and the supporting connection node 21 are both equipped with a frame body connected to the steel frame. Referring to the attached diagrams in the instruction manual Figures 1-6As shown, the positioning is completed according to the building foundation axis, the end support block 1 is hoisted to the designated position, the mounting groove at one end of the connecting truss 2 is fitted with the bracket of the end support block 1, the verticality of the connecting truss 2 is adjusted, and then the threaded rod is passed through the connection and tightened, and structural adhesive is filled into the fitting gap. Standard truss 3 and connecting truss 2 are engaged and connected. A positioning bracket 7 is installed at the connection point, ensuring a tight fit between the bracket and the two trusses. Positioning pins 5 are inserted through the through holes at both ends of positioning bracket 7. Node reinforcement assemblies 6 are installed on both sides of positioning bracket 7, embedding them into the pre-reserved internal channels of connecting truss 2 and standard truss 3. Structural adhesive is injected into the channels to ensure a tight bond between the reinforcement assemblies and the channels. Figures 1-4 As shown, the arc-shaped truss 4 is installed on both sides of the standard truss 3 to achieve a snap-fit ​​connection. A positioning frame 7 is installed at the connection. The positioning pin 5 and the node steel reinforcement group 6 are installed in the same way as the standard truss 3 and the connecting truss 2. At the same time, the positioning frame 9 is snap-fitted at the connection. The positioning pin 8 passes through the positioning frame 9 to ensure that the positioning pin 8 and the node steel reinforcement group 6 are staggered. Connect the supporting connection node 10 to the connecting truss 2 with bolts, and then connect and fix the supporting connection node 10 to the steel frame. The bottom of the steel frame is connected to the building foundation. Install the supporting connection node 11 in the same way to make it firmly connected to the arc truss 4 and the steel frame. After all the installation is completed, conduct a comprehensive inspection of the entire truss structure, including the tightness of the connection of each node, the verticality and flatness of the truss, etc. The connection structure between standard truss 3 and arc truss 4 is the same as the connection structure between docking truss 2 and standard truss 3, both consisting of positioning pin 1 5, node reinforcement group 6 and positioning frame 1 7. The connection between standard truss 3 and arc truss 4 is connected by positioning frame 2 9, and positioning pin 2 8 penetrates the interior of positioning frame 2 9. Arc truss 4 is connected to support connection node 2 11 by bolts, and support connection node 2 11 and steel frame form a support part connecting the building foundation structure. Positioning frame 1 7 has two sets of staggered through holes, and the two sets of through holes are respectively penetrated by positioning pin 1 5 and node reinforcement group 6. Positioning pin 2 8 is staggered with node reinforcement group 6 inside standard truss 3 and arc truss 4. Referring to the attached diagrams in the instruction manual Figures 1-6 As shown, the load on the roof is first applied to the curved truss 4. The curved truss 4, with its curved structure, distributes the load along the arc direction to the standard trusses 3 on both sides. The positioning frame 7, positioning pin 5 and node steel reinforcement group 6 at the connection between the standard truss 3 and the curved truss 4 work together. The positioning pin 5 mainly bears the shear force, and the node steel reinforcement group 6 mainly bears the tensile force, ensuring the smooth transmission of force. The load continues to be transferred from the standard truss 3 to the connecting truss 2. The positioning frame 7, positioning pin 5, and node steel reinforcement group 6 at the connection point also play a role in the division and transfer of forces, avoiding overload of a single component. The connecting truss 2 transfers the load to the end support block 1. The end support block 1, through its connection with the building foundation structure, ultimately transfers the load to the building foundation, achieving stable stress distribution of the entire structure. At the same time, the supporting connection node 10 and supporting connection node 21 form an auxiliary support system with the steel frame, sharing the vertical load of the truss main body, further improving the structure's resistance to deformation, and ensuring the stability and safety of the entire steel-wood truss structure during use.

[0024] Working principle: When using this large-span steel-wood truss structure for the roof, the roof load first acts on the main truss body composed of the connecting truss 2, standard truss 3, and arc truss 4. The load is then distributed to the standard trusses 3 on both sides through the arc structure of the arc truss 4. The standard truss 3 and the arc truss 4 are connected by positioning bracket 7, and positioning pin 5 passes through to form a rigid constraint. The node steel reinforcement group 6 is embedded in the reserved channel. The two are staggered and distributed to bear shear force and tension force respectively, ensuring smooth force transmission. The load is transferred from the standard truss 3 to the connecting truss 2. At the connection between the two, the force is distributed and transferred through the positioning frame 7, the positioning pin 5, and the node reinforcement group 6 to avoid overloading of a single component. The connecting truss 2 transfers the load to the end support block 1, whose bracket is fitted into the mounting groove of the connecting truss 2, and the threaded rod is fixed through it. The displacement is restricted by the friction of the fitting surface and the axial constraint force, so as to realize the transfer of the load to the building foundation. At the same time, the supporting connection node 10 and the supporting connection node 21 are connected to the connecting truss 2 and the arc truss 4 respectively by bolts, forming an auxiliary support with the steel structure to share the vertical load. The positioning pin 28 and the node reinforcement group 6 are staggered to optimize the node force, forming a multi-support system to improve the deformation resistance and increase the overall practicality.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-span steel-timber truss structure for roofing, comprising: End support blocks (1) are set at both ends of the steel-wood truss structure and connected to the building foundation structure. One side of the end support block (1) is set as a bracket adapted to the docking truss (2), and the docking truss (2), standard truss (3) and arc truss (4) are connected to form the main truss structure. The feature is that: the bracket of the end support block (1) is fitted and connected to the mounting groove at one end of the docking truss (2), and the connection between the end support block (1) and the docking truss (2) is penetrated by a threaded rod, and the other end of the docking truss (2) is engaged and connected with the standard truss (3), and the standard truss (3) is installed on both sides of the arc truss (4). A positioning frame (7) is installed at the connection between the docking truss (2) and the standard truss (3), and the two ends of the positioning frame (7) are respectively penetrated by a positioning pin (5), and there are node steel bars (6) on both sides of the positioning frame (7) to connect the docking truss (2) and the standard truss (3). The connection structure of the standard truss (3) and the arc truss (4) is the same as the connection structure of the docking truss (2) and the standard truss (3), both being connected by positioning pin 1 (5), node steel reinforcement group (6) and positioning frame 1 (7).

2. A large-span steel-wood truss structure for roofs according to claim 1, characterized in that: The docking truss (2) is connected to the support connection node (10) by bolts, and the support connection node (10) and the steel frame form a support part for connecting the building foundation structure.

3. A large-span steel-wood truss structure for roofs according to claim 1, characterized in that: The standard truss (3) and the arc truss (4) are connected by a positioning frame two (9), and the positioning frame two (9) is penetrated by a positioning pin two (8).

4. A large-span steel-wood truss structure for roofs according to claim 1, characterized in that: The arc-shaped truss (4) is connected to the second support connection node (11) by bolts, and the second support connection node (11) and the steel frame form a support part for connecting the building foundation structure.

5. A large-span steel-wood truss structure for roofs according to claim 1, characterized in that: The positioning frame (7) has two sets of staggered through holes, and the two sets of through holes are respectively penetrated by the positioning pin (5) and the node steel bar group (6).

6. A large-span steel-wood truss structure for roofs according to claim 3, characterized in that: The positioning pin 2 (8) is misaligned with the node reinforcement group (6) inside the standard truss (3) and the arc truss (4).

7. A large-span steel-wood truss structure for roofs according to claim 2, characterized in that: The supporting connection node one (10) and supporting connection node two (11) have the same structure, and the top of both supporting connection node one (10) and supporting connection node two (11) are provided with a frame that is connected to the steel frame.

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