Large-span steel structure modularized rapid assembling and connecting device and construction method thereof

Abstract

The invention relates to the technical field of steel structures, and discloses a large-span steel structure modularized rapid assembling and connecting device which is characterized in that the butt joint position of two H-shaped steel is connected through a stress reinforcing assembly, a plurality of first preformed holes are formed in the two ends of a web of each H-shaped steel, and a plurality of second preformed holes are formed in the two ends of an upper flange plate and a lower flange plate of each H-shaped steel. The connecting frame of the stress reinforcing assembly is accurately centered with the first preformed hole and the second preformed hole of the H-shaped steel, the first fastening assembly and the second fastening assembly are rapidly installed, compared with traditional welding, the splicing time of a single joint can be effectively shortened, a triangular supporting structure is formed by a groove of the connecting frame and the reinforcing mechanism, and the assembling efficiency of the H-shaped steel is improved. And through the pre-positioning design of the clamping blocks and the connecting plates, 'plug-and-fix 'can be realized, and the field adjustment time is shortened, so that the splicing and connecting efficiency is improved, and the construction efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structures, and in particular to a modular quick-assembly connection device for a large-span steel structure and a construction method thereof. Background Art

[0002] Steel structure is a structure made of steel materials and is one of the main types of building structures. In the construction of large-span steel structures, H-shaped steel is one of the key materials commonly used in large-span steel structures (a plane truss is formed by connecting multiple groups of H-shaped steels to support the roof and bridge main beams).

[0003] Traditional steel structure nodes mostly adopt on-site welding or high-strength bolt connection methods. Although it can be achieved through the structure of existing technology, in the actual use of such devices, welding operations require professional welders and strict environmental control. Single-node construction is time-consuming and irreversible installation. Bolt connections require precise alignment of holes in sequence, and the positioning errors of large-span components accumulate significantly. For this reason, a modular rapid assembly connection device for large-span steel structures and a construction method thereof are first provided. Summary of the Invention

[0004] In order to solve the technical problems existing in the background technology, the present invention proposes a modular rapid assembly and connection device for a large-span steel structure.

[0005] The present invention proposes a modular quick assembly connection device for a large-span steel structure, which connects the butt joints of two H-shaped steels through a force-bearing reinforcement component. Both ends of the web of the H-shaped steel are provided with a plurality of first reserved holes, and both ends of the upper flange plate and the lower flange plate of the H-shaped steel are provided with a plurality of second reserved holes. There are two stress-bearing reinforcement components, which are respectively arranged at the butt joints on both sides of the webs of two adjacent H-shaped steels. The side of the stress-bearing reinforcement component is fixed to the first reserved hole by a first fastening component, and the upper and lower ends of the stress-bearing reinforcement component are fixed to the adjacent second reserved holes by a second fastening component. The force-bearing reinforcement component includes a connecting frame arranged between two H-shaped steels, the front of the connecting frame has a groove, and a reinforcement mechanism is arranged in the groove to form a plurality of installation slots, which provide installation space for the first fastening component and the second fastening component; To address the shortcomings of traditional welding and bolting, this device uses modular, force-bearing reinforcement components for rapid assembly. The connecting frame fits snugly onto the web and flange of the H-beam, achieving precise positioning through first and second pre-set holes. The reinforcement mechanism forms a triangular support structure within the groove, enhancing the joint's shear strength. The first and second fastening assemblies secure the web and flange, respectively, forming a bidirectional fastening system. This shortens the assembly time of individual joints and significantly improves efficiency compared to traditional welding processes.

[0006] As a further optimized solution of the present invention, the reinforcement mechanism includes a reinforcement column and a reinforcement plate fixed in the groove, the reinforcement column is installed in the middle of the inner cavity of the groove, the reinforcement plates are V-shaped and symmetrically distributed on both sides of the reinforcement column, the V-shaped tip of the reinforcement plate is fixed to the middle of the reinforcement column, and the two ends of the V-shaped opening of the reinforcement plate are respectively fixed to two adjacent inner corners of the groove to form a triangular support structure; The reinforcement column and the V-shaped reinforcement plate form a triangular support. The reinforcement plate is made of Q460 high-strength steel, with a thickness of 12mm, and can withstand tensile and compressive stresses of up to 345MPa. The triangular support structure increases the shear bearing capacity of the node to 1.8 times that of traditional nodes. For example, in large-span roof projects, this structure can effectively reduce the risk of node cracking due to uneven loads, ensuring structural safety.

[0007] As a further optimized solution of the present invention, the V-shaped opening of the reinforcing plate and the side wall of the groove form a closed first installation slot, the first installation slot is triangular and provides an installation space for the first fastening component; The triangular design of the first mounting slot precisely matches the snap-in block, which forms a mechanical lock when embedded. Combined with the first bolt penetrating the connecting frames on both sides of the web, it can withstand a single-bolt shear capacity of 25kN. This structure ensures the reliability of the web connection. For example, in the splicing of bridge main beams, it can effectively transmit shear forces and reduce out-of-plane deformation of the web.

[0008] As a further optimized solution of the present invention, a closed second mounting slot is formed between the V-shaped edge of the reinforcement plate, the reinforcement column and the side wall of the groove. The second mounting slot is a right triangle and provides an installation space for the second fastening assembly. The second mounting slot provides a positioning guide for the flange plate connection. The connecting plate spans the flange plate connection and is fixed through the second bolt and the second reserved hole. The tensile bearing capacity of a single bolt reaches 50kN. The right-angled triangle structure ensures that the flange plate is evenly stressed. For example, in a large-span roof, it can effectively resist bending moment and reduce the risk of flange warping and deformation.

[0009] As a further optimized solution of the present invention, the first fastening assembly includes a clamping block that is clamped in the installation slot, and a first fastener is installed on the clamping block. The first fastener includes a first bolt and a first nut. One end of the first bolt is threadedly connected to the clamping block, and the other end of the first bolt passes through the connection frame and the first reserved hole and is locked by the first nut. The triangular design of the snap-in block snaps into place with the first mounting slot, allowing for quick positioning via the guide block during installation without the need for additional adjustment. The first bolt utilizes a 10.9-grade high-strength bolt, coupled with a nut anti-loosening design to ensure long-term stability of the connection. It is suitable for scenarios such as industrial plants subject to heavy vibration loads.

[0010] As a further optimized solution of the present invention, two groups of first docking holes are symmetrically distributed on the back of the connecting frame, and each group of first docking holes corresponds to the first reserved holes on the adjacent H-shaped steel webs. The free end of the first bolt sequentially passes through the first docking hole, the first reserved hole on one side of the connecting frame, and the groove of the other side of the connecting frame and is threadedly connected with the first nut; The centering error between the first docking hole and the first reserved hole is ≤1mm. Precision is ensured through factory prefabrication. Bolts can be quickly inserted during on-site installation, reducing hole alignment time. The double-sided connection structure balances the forces on both sides of the web. For example, in large-span truss nodes, node eccentricity caused by unilateral force can be effectively avoided.

[0011] As a further optimized solution of the present invention, the second fastening assembly includes a connecting plate spanning the connection between the upper flange plates and the lower flange plates of the two H-shaped steels, and second fasteners are installed at both ends of the connecting plate. The second fasteners include a second bolt and a second nut. One end of the second bolt is threadedly connected to the connecting plate, and the other end of the second bolt passes through the upper flange plate or the lower flange plate of the adjacent H-shaped steel and the connecting frame and extends into the groove and is locked by the second nut. The connecting plate is made of 16mm thick steel plate with bolt holes spaced 200mm apart at both ends, which can adapt to H-shaped steel flange plates of different specifications. The second bolt is a torsion shear type high-strength bolt, and the pre-tightening force is controlled by a torque wrench to ensure that the flange plate is tightly connected. For example, in the steel structure of a high-rise building, it can effectively transmit axial force and improve node stiffness.

[0012] As a further optimized solution of the present invention, two groups of second docking holes are opened on the upper and lower end surfaces of the connection frame and are symmetrically distributed. Each group of second docking holes corresponds to the second reserved holes on the adjacent H-shaped steel. The free end of the second bolt passes through the second reserved hole and the second docking hole and extends into the groove and is threadedly connected with the second nut. The hole diameter tolerance of the second docking hole and the second reserved hole is ±0.5mm, ensuring smooth penetration of the bolts. The double-sided connecting plates are symmetrically distributed on both sides of the flange plate to form a "splint-type" connection, which can withstand the bending moment transmitted from the flange plate. For example, in long-span bridges, it can effectively reduce the stress concentration at the connection between the flange plate and the web plate.

[0013] As a further optimized solution of the present invention, the number of connecting plates is four and they are divided into two groups and respectively arranged at the connection between the upper flange plate and the lower flange plate of two adjacent H-shaped steels. The two connecting plates in each group are symmetrically distributed with the web of the H-shaped steel as the center line; Symmetrically distributed connecting plates ensure balanced force on the upper and lower flange plates. Each set of connecting plates can withstand a total tensile force of 100kN. This design is suitable for steel structure nodes subjected to bidirectional forces, such as the cross-shaped nodes in truss structures. It can simultaneously withstand axial and shear forces, improving the overall stability of the node.

[0014] A construction method for a modular rapid assembly connection device for a large-span steel structure, the specific steps are as follows: S1: Place two connecting frames on both sides of the connection between two adjacent H-beams, so that the upper end faces of the connecting frames are respectively aligned with the upper flanges of the adjacent H-beams, the lower end faces of the connecting frames are respectively aligned with the lower flanges of the adjacent H-beams, the back faces of the connecting frames are respectively aligned with the webs of the adjacent H-beams, and the first reserved hole and the second reserved hole are respectively aligned with the first docking hole and the second docking hole; S2: Place the clamping block into the groove on one side so that the clamping block is engaged in the first installation slot formed by the two adjacent reinforcement plates, and the free end of the first bolt passes through the first docking hole and the first reserved hole and extends into the groove on the other side. Then, thread the first nut onto the first bolt and tighten it to complete the horizontal docking between the two H-shaped steels. S3: Place the connecting plate across the joint between the upper flange and lower flange of two adjacent H-shaped steels. The free end of the second bolt passes through the second reserved hole and the second joint hole and extends into the groove. Then, the second nut is threaded onto the second bolt and tightened to complete the longitudinal joint between the two H-shaped steels. During the steps of S2 and S3, S4 completes the node assembly according to the installation process: pre-positioning → engaging the connection frame → installing the fastening components → initial tightening → loading test → final tightening → acceptance test.

[0015] This construction method adopts a standardized process. In the pre-positioning stage, laser marking is used to ensure that the fitting error of the connection frame is ≤2mm. After the initial tightening, the preload force of the single bolt is detected by a stress sensor. The final tightening is done with a torque wrench to ensure that the design value is achieved. For example, in a large-span gymnasium project, the installation time of a single node is shortened by 45 minutes compared with the traditional process. No professional welders are required, and ordinary workers can operate it, significantly reducing construction costs and technical barriers.

[0016] The large-span steel structure modular rapid assembly connection device and construction method proposed in the present invention have the following beneficial effects: (1) By precisely aligning the connecting frame of the load-bearing reinforcement component with the first and second reserved holes of the H-shaped steel, and by quickly installing the first and second fastening components, the assembly time of a single node can be effectively shortened compared to traditional welding. The grooves of the connecting frame and the reinforcement mechanism form a triangular support structure, and the pre-positioning design of the clamping block and the connecting plate can achieve "plug and fasten", reducing on-site adjustment time, thereby improving assembly and connection efficiency, and further improving construction efficiency; (2) The triangular support structure formed by the reinforcement plate and the reinforcement column can effectively improve the shear strength of the connection frame and can withstand strong lateral loads. The multiple groups of first bolts of the first fastening assembly pass through the connection frames on both sides of the web, and the connection plate of the second fastening assembly spans the connection between the flange plates, forming a "transverse + longitudinal" bidirectional fastening system, which can effectively improve the overall bending stiffness of the node and effectively reduce the deformation risk of large-span structures; (3) All components of this device are connected by bolts and can be quickly disassembled and reused, which can increase the reuse rate of the connection frame and fastening components. Compared with traditional welded nodes, it can reduce steel loss and meet the requirements of green building and sustainable construction; (4) The construction method of this application adopts a standardized process of "pre-positioning → locking → initial tightening → final tightening". It does not require professional welders to operate, and ordinary workers can take up the job after simple training. The modular components are prefabricated in the factory with high precision, and only need to be assembled on site according to the number. This avoids the dependence of traditional processes on the skill level of operators, significantly lowers the construction technology threshold of large-span steel structures, and promotes the development of standardized construction in the industry; (5) This device is suitable for connecting steel structures with various cross-sections, such as H-shaped steel and box beams. By adjusting the size of the connection frame and the number of fastening components, it can be adapted to bridges, roofs and other projects with various spans, and has wide applicability and reliability.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall appearance structure of this application; Figure 2 This is a schematic diagram of the front structure of the connection between the H-shaped steel and the stress-bearing reinforcement component of this application; Figure 3 This is a schematic diagram of the back structure of the connection between the H-shaped steel and the stress-bearing reinforcement component of this application; Figure 4 This is a schematic diagram of the three-dimensional structure of the stress-bearing reinforcement component of the present application from a first perspective; Figure 5 This is a schematic diagram of the three-dimensional structure of the stress-bearing reinforcement component of the present application from a second perspective; Figure 6 This is a schematic structural diagram of the first fastening assembly of the present application; Figure 7 This is a schematic structural diagram of the second fastening assembly of the present application.

[0019] Description of the drawings: 1. H-shaped steel; 101. First reserved hole; 102. Second reserved hole; 2. Force-bearing reinforcement component; 201. Connecting frame; 202. First docking hole; 203. Second docking hole; 204. Groove; 210. Reinforcement column; 211. Reinforcement plate; 3. First fastening component; 301. Clamping block; 302. Guide block; 310. First bolt; 311. First nut; 4. Second fastening component; 401. Connecting plate; 410. Second bolt; 411. Second nut. DETAILED DESCRIPTION

[0020] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and are not to be construed as limiting the present invention.

[0021] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0022] In the field of long-span steel structures, traditional welding processes have high requirements for the environment and personnel skills, and the construction period is long. Conventional bolt connections have problems such as accumulated positioning errors and insufficient node stiffness. The modular rapid assembly connection device provided by the present invention achieves efficient connection and reliable stress-bearing of H-shaped steel nodes through innovative load-bearing reinforcement components and a bidirectional fastening system. The details are as follows: like Figure 1-Figure 5 As shown, the device is based on two sets of symmetrically distributed stress-bearing reinforcement components 2 as the core, connecting the web joints of adjacent H-shaped steels 1. Each set of stress-bearing reinforcement components 2 includes a connection frame 201 and a built-in reinforcement mechanism. like Figure 2-Figure 4 As shown, the connection frame 201 is in the shape of a rectangular plate, with a groove 204 on its front. A reinforcement column 210 is vertically fixed in the middle of the groove cavity, and V-shaped reinforcement plates 211 are symmetrically arranged on both sides. The V-shaped tip of the reinforcement plate 211 is welded and fixed to the middle of the reinforcement column 210, and the two ends of the opening are respectively connected to the adjacent inner corners of the groove 204 to form a triangular support structure. This structure uses the stability principle of the triangle to increase the shear bearing capacity of the node to 1.8 times that of traditional processes. For example, when subjected to a lateral load of 150kN, the node deformation is only 70% of that of a traditional welded node, effectively reducing the risk of cracking due to uneven load.

[0023] like Figure 1 、 Figure 4 and Figure 5 As shown, the web of the H-shaped steel 1 is provided with a first reserved hole 101, and the upper and lower flange plates are provided with second reserved holes 102, which form a precise alignment system with the first docking hole 202 on the back of the docking frame 201 and the second docking holes 203 on the upper and lower end surfaces; like Figure 2 and Figure 6 As shown, the first fastening assembly 3 is embedded in the first installation slot (triangular closed space) formed by the reinforcing plate 211 and the groove 204 through the triangular clamping block 301, and the first bolt 310 is used to penetrate the connecting frame 201 on both sides of the web. The shear bearing capacity of a single bolt reaches 25kN; like Figure 1-Figure 5 as well as Figure 7 As shown, the connecting plate 401 of the second fastening assembly 4 spans the flange plate connection, and passes through the second docking hole 203 of the flange plate and the connecting frame 201 through the torsion shear type second bolt 410. The tensile bearing capacity of a single bolt is 50kN, forming a bidirectional force system of "transverse shear resistance of the web plate + longitudinal tensile resistance of the flange plate", which increases the overall bending stiffness of the node by 40%.

[0024] Specifically, the connecting frame 201 is milled from Q355B steel plate with a thickness of 20 mm. The roughness of the back surface and the web of the H-shaped steel 1 is Ra≤6.3 μm to ensure close contact. The groove 204 is 30 mm deep, the internal reinforcement column 210 is 25 mm in diameter, and the reinforcement plate 211 is 12 mm thick. It uses Q460 high-strength steel with a V-shaped angle of 60°. The overall support structure is formed by CNC cutting and robot welding.

[0025] When the H-shaped steel 1 is subjected to transverse shear force, the load is transferred to the first bolt 310 through the web, and then passes through the clamping block 301 → the reinforcement plate 211 → the reinforcement column 210 → the connection frame 201, and finally dispersed to the adjacent H-shaped steel 1, forming a closed shear resistance path; The tension or pressure borne by the flange plate is transmitted to the connecting plate 401 through the second bolt 410, and is transmitted to the entire load-bearing reinforcement component 2 through the rigid contact between the reinforcement plate 211 and the side wall of the groove 204, thereby avoiding stress concentration at the connection between the flange plate and the web.

[0026] In one embodiment, the construction process is centered around "factory prefabrication precision control + on-site rapid assembly," with the following specific steps: Pre-positioning and alignment: The positions of the reserved holes of H-beam 1 are determined by 3D laser scanning in the factory. A total station is used on-site to lay out the lines and fit the two sets of connection frames 201 to both sides of the web of H-beam 1. Ensure that the upper end face of the connection frame 201 fits tightly with the upper flange plate, and the lower end face fits tightly with the lower flange plate. The centering error between the reserved holes and the connection holes is ≤2mm. Horizontal connection construction: Insert the clamping block 301 into the first installation slot along the guide block 302. Pass the first bolt 310 through the first docking hole 202 of the connecting frame 201 on one side, the first reserved hole 101 of the web of the H-shaped steel 1, and the groove 204 of the connecting frame 201 on the other side in sequence. Use an electric wrench to initially tighten to 70% of the design torque. The single-side web connection takes about 5 minutes. Longitudinal connection construction: Two sets of four connecting plates 401 symmetrically cover the connection between the upper and lower flange plates. The second bolt 410 passes through the second reserved hole 102 of the flange plate and the second docking hole 203 of the connecting frame 201. Use a torsion shear type electric wrench to tighten the final tightening. The single set of flange plate connection takes about 8 minutes. Node performance verification: Use a stress and strain monitor to test the preload forces of the first bolt 310 and the second bolt 410 to ensure they meet the design values of 25 kN m and 50 kN m, respectively. Use a dial indicator to measure node displacement; under the design load, the deformation should be ≤ L / 1000 (L is the span).

[0027] In summary, the present invention has the following advantages: Modular design: The connection frame 201 and fastening components can be prefabricated and numbered in the factory before being assembled on-site according to the drawings. The installation time for a single node is only 20 minutes, which is 70% more efficient than traditional welding processes. In a certain exhibition center project, the construction period of 180 nodes was shortened by 18 days. Turnover: The fully bolted design allows for reusable components, reducing steel loss by 25%. For example, in a temporary trestle project, the device was reused three times, saving over 40% in costs. Adaptable expansion: By adjusting the width of the connection frame 201 and the bolt spacing, it can adapt to H-shaped steel with a height of 300-1000mm. In a high-speed railway platform canopy project, it successfully achieved the rapid connection of H-shaped steel with different cross-sections to meet complex stress requirements; Through geometric structure innovation and industrialized construction process, this invention solves the efficiency and reliability problems of large-span steel structure connections, providing a solution that is both technologically advanced and economically reasonable for large-scale projects such as bridges and stadiums.

[0028] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A modular quick assembly connection device for a large-span steel structure, wherein the butt joints of two H-shaped steels (1) are connected by a force-reinforced component (2), a plurality of first reserved holes (101) are provided at both ends of the web of the H-shaped steel (1), and a plurality of second reserved holes (102) are provided at both ends of the upper flange plate and the lower flange plate of the H-shaped steel (1), and the device is characterized in that: There are two stress-bearing reinforcement components (2) and they are respectively arranged at the joints on both sides of the webs of two adjacent H-shaped steels (1); the side of the stress-bearing reinforcement component (2) is fixed to the first reserved hole (101) through the first fastening component (3); and the upper and lower ends of the stress-bearing reinforcement component (2) are fixed to the adjacent second reserved hole (102) through the second fastening component (4); The force-bearing reinforcement component (2) comprises a connecting frame (201) arranged between two H-shaped steels (1), the front surface of the connecting frame (201) having a groove (204), and a reinforcement mechanism is arranged in the groove (204) to form a plurality of installation slots, and the installation slots provide installation space for the first fastening component (3) and the second fastening component (4).

2. A modular quick assembly and connection device for a large-span steel structure according to claim 1, characterized in that: The reinforcement mechanism comprises a reinforcement column (210) and a reinforcement plate (211) fixed in the groove (204), the reinforcement column (210) being installed in the middle of the inner cavity of the groove (204), the reinforcement plates (211) being V-shaped and symmetrically distributed on both sides of the reinforcement column (210), the V-shaped tip of the reinforcement plate (211) being fixed to the middle of the reinforcement column (210), and the two ends of the V-shaped opening of the reinforcement plate (211) being respectively fixed to two adjacent inner corners of the groove (204) to form a triangular support structure.

3. A modular rapid assembly and connection device for a large-span steel structure according to claim 2, characterized in that: The V-shaped opening of the reinforcing plate (211) and the side wall of the groove (204) form a closed first installation slot, which is triangular and provides an installation space for the first fastening component (3).

4. A modular rapid assembly and connection device for a large-span steel structure according to claim 2, characterized in that: A closed second installation slot is formed between the V-shaped edge of the reinforcement plate (211), the reinforcement column (210) and the side wall of the groove (204); the second installation slot is a right-angled triangle and provides installation space for the second fastening assembly (4).

5. The modular rapid assembly and connection device for a large-span steel structure according to claim 1, characterized in that: The first fastening assembly (3) includes a clamping block (301) that is clamped and arranged in the installation slot. A first fastener is installed on the clamping block (301). The first fastener includes a first bolt (310) and a first nut (311). One end of the first bolt (310) is threadedly connected to the clamping block (301), and the other end of the first bolt (310) passes through the connecting frame (201) and the first reserved hole (101) and is locked by the first nut (311). The number of the first bolts (310) is multiple and is consistent with the number of the first reserved holes (101) and corresponds one to one; The clamping block (301) is triangular and fits in the first installation slot. A guide block (302) is installed on the front of the clamping block (301).

6. A modular rapid assembly and connection device for a large-span steel structure according to claim 5, characterized in that: The back of the connecting frame (201) is provided with two groups of first connecting holes (202) that are symmetrically distributed. Each group of first connecting holes (202) corresponds to the first reserved holes (101) on the web of the adjacent H-shaped steel (1). The free end of the first bolt (310) sequentially passes through the first connecting hole (202) on one side of the connecting frame (201), the first reserved hole (101) and the groove (204) of the other side of the connecting frame (201) and is threadedly connected to the first nut (311).

7. The modular rapid assembly and connection device for a large-span steel structure according to claim 1, characterized in that: The second fastening assembly (4) includes a connecting plate (401) spanning the connection between the upper flange plate and the lower flange plate of the two H-shaped steels (1), and second fasteners are installed at both ends of the connecting plate (401). The second fasteners include a second bolt (410) and a second nut (411). One end of the second bolt (410) is threadedly connected to the connecting plate (401), and the other end of the second bolt (410) passes through the upper flange plate or the lower flange plate of the adjacent H-shaped steel (1) and the connecting frame (201) and extends into the groove (204) and is locked by the second nut (411).

8. The modular rapid assembly and connection device for a large-span steel structure according to claim 7, characterized in that: The upper and lower end surfaces of the connecting frame (201) are provided with two groups of second docking holes (203) that are symmetrically distributed, and each group of second docking holes (203) corresponds to the second reserved holes (102) on the adjacent H-shaped steel (1). The free end of the second bolt (410) passes through the second reserved hole (102) and the second docking hole (203) and extends into the groove (204) and is threadedly connected to the second nut (411).

9. The modular rapid assembly and connection device for a large-span steel structure according to claim 7, characterized in that: The number of the connecting plates (401) is four and they are divided into two groups and are respectively arranged at the connection between the upper flange plate and the lower flange plate of two adjacent H-shaped steels (1). The two connecting plates (401) in each group are symmetrically distributed with the web of the H-shaped steel (1) as the center line.

10. A construction method for a modular rapid assembly connection device for a large-span steel structure, characterized in that: The specific steps are as follows: S1 places two connecting frames (201) on both sides of the connection between two adjacent H-shaped steels (1), so that the upper end faces of the connecting frames (201) are respectively fitted with the upper flange plates of the adjacent H-shaped steels (1), the lower end faces of the connecting frames (201) are respectively fitted with the lower flange plates of the adjacent H-shaped steels (1), the back faces of the connecting frames (201) are fitted with the webs of the adjacent H-shaped steels (1), and the first reserved hole (101) and the second reserved hole (102) are respectively aligned with the first docking hole (202) and the second docking hole (203); S2 places the clamping block (301) into the groove (204) on one side, so that the clamping block (301) is clamped in the first installation slot formed by the two adjacent reinforcing plates (211), and the free end of the first bolt (310) passes through the first docking hole (202) and the first reserved hole (101) and extends into the groove (204) on the other side, and then the first nut (311) is threadedly sleeved on the first bolt (310) and tightened, thereby completing the horizontal docking between the two H-shaped steels (1). The above process is reversed to complete the removal of the first fastening assembly (3); S3: The connecting plate (401) is placed across the joint of the upper flange plate and the lower flange plate of the two adjacent H-shaped steels (1). The free end of the second bolt (410) passes through the second reserved hole (102) and the second joint hole (203) and extends into the groove (204). The second nut (411) is then threaded onto the second bolt (410) and tightened. This completes the longitudinal joint between the two H-shaped steels (1). The above process is reversed to complete the removal of the second fastening assembly (4). During the steps of S2 and S3, S4 follows the installation process: pre-positioning → engaging the connection frame (201) at the joint of the two H-shaped steels (1) → installing the first fastening assembly (3) and the second fastening assembly (4) → initially tightening the first nut (311) and the second nut (411) → loading test → final tightening → acceptance test, and the device can be completed for splicing and combining in a large-span steel structure.

Images