An assembled welding-free node anti-seismic reinforcing structure for steel structure engineering

Abstract

The application relates to the technical field of building steel structure, in particular to an assembled welding-free joint anti-seismic reinforcing structure for steel structure engineering, which is provided with an L-shaped connecting plate, an outer steel plate, an intermediate friction energy dissipation steel plate and a bolt assembly, and the bolt assembly penetrates the outer steel plate, an expansion hole and the first connecting plate in sequence. The assembled form of the full-bolt connection is arranged, the advantages of welding-free reinforcement are realized, and the problems of steel performance deterioration and residual stress caused by high-temperature welding are avoided. The intermediate friction energy dissipation steel plate is arranged between the first connecting plate and the outer steel plate, the expansion hole is arranged, and the bolt assembly is pre-tightened, so that the anti-seismic energy dissipation function is realized. During normal use, the rigid connection of the bolt assembly guarantees stable force transmission of the structure. When an earthquake occurs, the intermediate friction energy dissipation steel plate can slide along the bolt radial direction through the expansion hole, the seismic vibration energy is converted into heat energy through the friction between the steel plates, the peak value of the seismic force is effectively reduced, and the damage of the beam column component is reduced.

Description

Technical Field

[0001] This utility model relates to the field of building steel structure technology, and in particular to a prefabricated weld-free joint seismic reinforcement structure for steel structure engineering. Background Technology

[0002] With the acceleration of urbanization and the increasing scarcity of land resources, traditional demolition and reconstruction models are struggling to meet the demands of urban development due to their high costs and poor environmental performance. Urban renewal has become a crucial path for the sustainable development of the construction industry. Steel structures, with their advantages of high strength, light weight, and convenient construction, are widely used in building and bridge engineering. As key force-transmitting components, the reinforcement technology of steel structure nodes directly affects the safety, durability, and seismic performance of the overall structure, making the maintenance and upgrading of existing steel structure buildings of great significance.

[0003] However, current traditional steel structure joint reinforcement methods have many limitations. Taking welding reinforcement as an example, the high-temperature welding process leads to a decrease in steel toughness and an increase in residual stress, significantly increasing the risk of brittle structural failure; it also places stringent requirements on the professionalism of operators and the working space; after welding, weld flaw detection is required, which is inefficient; in addition, the irreversibility of welding makes subsequent structural modifications or component replacements extremely difficult, making it difficult to adapt to dynamic maintenance needs. Traditional bolted connection reinforcement also has shortcomings. Ordinary bolted joints rely on friction or bearing pressure to transmit force, and are prone to slippage and loosening under long-term or dynamic loads, failing to guarantee the long-term stability of the structure; bolted connection reinforcement can only enhance the stiffness of the joint, lacking an active energy dissipation mechanism. Under repeated loading such as earthquakes, it cannot effectively dissipate energy, leading to continuous accumulation of joint damage and a sharp decline in seismic performance, making it difficult to meet the stringent requirements of modern engineering for the reliability, durability, and maintainability of steel structure joint reinforcement. Summary of the Invention

[0004] To address the above issues, this application provides a prefabricated, weld-free joint seismic reinforcement structure for steel structure engineering, which includes an L-shaped connecting plate. The L-shaped connecting plate comprises a first connecting plate and a second connecting plate, which are integrally formed and vertically arranged. An outer steel plate is provided on the outside of the first connecting plate, and an intermediate friction energy-dissipating steel plate is provided between the first connecting plate and the outer steel plate. The intermediate friction energy-dissipating steel plate has horizontally opened expansion holes. Bolt assemblies are provided on both the first and second connecting plates, and the bolt assemblies sequentially pass through the outer steel plate, the expansion holes, and the first connecting plate.

[0005] In one embodiment, a triangular reinforcing plate is provided between the first connecting plate and the second connecting plate, and the two right-angled sides of the reinforcing plate are welded to the first connecting plate, the second connecting plate, and the outer steel plate, respectively.

[0006] In one embodiment, the telescopic hole is elliptical, and the major axis of the telescopic hole is horizontal.

[0007] In one embodiment, the surface of the intermediate friction energy-dissipating steel plate is coated with a high friction coefficient coating with a thickness of 0.1 to 0.3 mm and a surface friction coefficient ≥ 0.5, which is used to enhance the friction energy dissipation effect between the steel plates.

[0008] In one embodiment, the coating is a silicone rubber-based composite coating, a zinc-aluminum composite coating, or a ceramic particle coating, wherein the silicone rubber-based composite coating contains uniformly dispersed wear-resistant particles such as silicon carbide and alumina.

[0009] In one embodiment, the first connecting plate is connected to the H-shaped steel beam, and the second connecting plate is connected to the steel column.

[0010] In one embodiment, the bolt assembly includes a through-type high-strength bolt for connecting H-shaped steel beams and a single-sided high-strength bolt for connecting steel columns. The single-sided high-strength bolt has a flared nut at the end of its thread to accommodate the single-sided fastening requirements of the box-type steel column.

[0011] The beneficial effects of this utility model are as follows:

[0012] This application discloses a prefabricated, weld-free joint seismic reinforcement structure for steel structure engineering. By adopting an assembly method with all bolt connections, it achieves the advantages of weld-free reinforcement, avoiding the deterioration of steel performance and residual stress caused by high temperatures during welding. It eliminates the need for hot work, allowing construction under load, significantly reducing construction risks and the requirements for operating space, and making subsequent disassembly and maintenance more convenient. By setting an intermediate friction-dissipating steel plate between the first connecting plate and the outer steel plate, and opening expansion holes, and cooperating with the pre-tightening of the bolt assembly, the seismic energy dissipation function is achieved. Under normal use, the rigid connection of the bolt assembly ensures the stable transmission of force in the structure. During an earthquake, the intermediate friction-dissipating steel plate can slide radially along the bolts through the expansion holes, using the friction between the steel plates to convert the seismic energy into heat energy, effectively reducing the peak seismic force and reducing damage to beam and column components. Attached Figure Description

[0013] Figure 1 This is a top view of the present invention;

[0014] Figure 2 This is a top view of the utility model in use;

[0015] Figure 3 This is a front view of the utility model in use;

[0016] Explanation of symbols in the diagram:

[0017] 1. L-shaped connecting plate; 11. First connecting plate; 12. Second connecting plate;

[0018] 2. Outer steel plate;

[0019] 3. Intermediate friction energy-dissipating steel plate; 31. Expansion joint;

[0020] 4. Bolt assembly;

[0021] 5. Reinforcing plate;

[0022] 6. Steel beams;

[0023] 7. Steel columns. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0025] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] like Figure 1-3 As shown, a prefabricated weldless joint seismic reinforcement structure for steel structure engineering is provided with an L-shaped connecting plate 1. The L-shaped connecting plate 1 includes a first connecting plate 11 and a second connecting plate 12. The first connecting plate 11 and the second connecting plate 12 are integrally formed and vertically arranged. An outer steel plate 2 is provided on the outside of the first connecting plate 11. An intermediate friction energy dissipation steel plate 3 is provided between the first connecting plate 11 and the outer steel plate 2. A horizontal expansion hole 31 is provided on the intermediate friction energy dissipation steel plate 3. Bolt assemblies 4 are provided on both the first connecting plate 11 and the second connecting plate 12. The bolt assemblies 4 pass through the outer steel plate 2, the expansion hole 31 and the first connecting plate 11 in sequence.

[0027] Specifically, the prefabricated, weld-free joint seismic reinforcement structure is based on an L-shaped connecting plate 1, with a first connecting plate 11 and a second connecting plate 12 integrally formed and perpendicular to each other, serving as the core connecting frame. An outer steel plate 2 is arranged parallel to the outer side of the first connecting plate 11, with an intermediate friction-dissipating steel plate 3 sandwiched between them. A horizontal expansion hole 31 is formed on the intermediate friction-dissipating steel plate 3. Bolt assemblies 4 are installed on both the first and second connecting plates 11 and 12, sequentially penetrating the outer steel plate 2, the expansion hole 31, and the first connecting plate 11, pressing them together as a whole through pre-tightening force. The second connecting plate 12 is connected to the steel column 7 via the bolt assembly 4, and the first connecting plate 11 is connected to the steel beam 6 via the bolt assembly 4, forming a beam-column joint seismic reinforcement system. When this reinforcement structure is in use, under normal operating conditions, the bolt assembly 4 tightly presses the outer steel plate 2, the intermediate friction energy dissipation steel plate 3, and the first connecting plate 11 together through pre-tightening force to form a rigid connection, which can stably transmit the operating load. When an earthquake occurs, the beam-column joint will displace. Due to the setting of the expansion hole 31, the intermediate friction energy dissipation steel plate 3 can slide along the radial direction of the bolt, and generate frictional resistance at the contact surface with the outer steel plate 2 and the first connecting plate 11, converting the kinetic energy of the earthquake into heat energy for dissipation, thereby reducing component damage and effectively improving the seismic performance of the steel structure joint. In this application, by setting up an assembly form with all bolted connections, the advantages of welding-free reinforcement are achieved, avoiding the deterioration of steel performance and residual stress caused by high welding temperatures. No hot work is required, and construction can be carried out under load, significantly reducing construction risks and the requirements for operating space. Disassembly and maintenance are also more convenient in the later stages. By setting an intermediate friction energy-dissipating steel plate 3 between the first connecting plate 11 and the outer steel plate 2, and opening an expansion hole 31, and cooperating with the bolt assembly 4 for pre-tightening, the seismic energy dissipation function is achieved. Under normal use, the rigid connection of the bolt assembly 4 ensures the stable transmission of force in the structure. When an earthquake occurs, the intermediate friction energy-dissipating steel plate 3 can slide radially along the bolt through the expansion hole 31, using the friction between the steel plates to convert the seismic energy into heat energy, effectively reducing the peak seismic force and reducing damage to beam and column components.

[0028] like Figure 1 , 2 As shown, a triangular reinforcing plate 5 is provided between the first connecting plate 11 and the second connecting plate 12. The two right-angled sides of the reinforcing plate 5 are welded to the first connecting plate 11, the second connecting plate 12, and the outer steel plate 2, respectively.

[0029] Specifically, by setting a triangular reinforcing plate 5 between the first connecting plate 11 and the second connecting plate 12, and welding its two right-angled sides to the first connecting plate 11, the second connecting plate 12, and the outer steel plate 2 respectively, the overall structural strength and stability of the L-shaped connecting plate are significantly improved. This effectively disperses and transfers stress, reduces deformation and displacement of the connecting plate under load, and enhances the reliability of the reinforced structure under service loads and seismic action. Simultaneously, the welded connection between the reinforcing plate 5 and the outer steel plate 2 further strengthens the cooperative load-bearing capacity between the outer steel plate 2 and the L-shaped connecting plate 1, making the entire reinforced assembly a more robust whole when resisting external forces, reducing the risk of damage to critical parts, extending the service life of the reinforced steel structure nodes, and providing a more reliable guarantee for structural safety.

[0030] like Figure 3 As shown, the telescopic hole 31 is elliptical, and the major axis of the telescopic hole 31 is horizontal.

[0031] Specifically, the expansion joint 31 is designed as an ellipse with its major axis pointing horizontally, which can accurately adapt to the horizontal displacement requirements of the beam-column joint under seismic loading. The elliptical major axis provides horizontal sliding space, allowing the intermediate friction energy-dissipating steel plate 3 to slide smoothly along its major axis during an earthquake. This effectively extends the friction stroke between the steel plates, fully utilizes the friction energy dissipation effect, and thus dissipates seismic energy more efficiently, reducing the seismic force on the structure and improving the seismic performance and safety of the steel structure joint under seismic conditions.

[0032] like Figure 1 , 3 As shown, the surface of the intermediate friction energy-dissipating steel plate 3 is coated with a high friction coefficient coating with a thickness of 0.1 to 0.3 mm and a surface friction coefficient ≥ 0.5, which is used to enhance the friction energy dissipation effect between the steel plates.

[0033] Specifically, coating the surface of the intermediate friction energy-dissipating steel plate 3 with a high friction coefficient coating of 0.1–0.3 mm thickness and a surface friction coefficient ≥0.5 can significantly improve the friction energy dissipation efficiency between the steel plates. By increasing the frictional resistance of the steel plate contact surface, the coating enables the intermediate friction energy-dissipating steel plate 3 to convert more seismic energy into heat energy and dissipate it rapidly when relative displacement occurs under seismic action, effectively reducing the impact of seismic forces on the structure.

[0034] like Figure 1 , 3 As shown, the coating is a silicone rubber-based composite coating, a zinc-aluminum composite coating, or a ceramic particle coating, wherein the silicone rubber-based composite coating contains uniformly dispersed wear-resistant particles such as silicon carbide and alumina.

[0035] Specifically, by employing silicone rubber-based composite coatings, zinc-aluminum composite coatings, or ceramic particle coatings, and uniformly dispersing wear-resistant particles such as silicon carbide and alumina within the silicone rubber-based composite coating, diverse high-friction solutions can be provided to meet different engineering needs. Zinc-aluminum composite coatings offer stable friction performance through interlocking between metals, while ceramic particle coatings significantly improve the coefficient of friction with their high hardness and rough surface. Silicone rubber-based composite coatings enhance the wear resistance of the substrate through wear-resistant particles, maintaining the elastic deformation capacity of rubber to accommodate relative displacement between steel plates, and forming a microscopic protrusion structure through hard particles, thereby greatly improving the coefficient of friction and wear resistance.

[0036] like Figure 2 As shown, the first connecting plate 11 is connected to the H-shaped steel beam 6, and the second connecting plate 12 is connected to the steel column 7.

[0037] Specifically, by connecting the first connecting plate 11 to the H-shaped steel beam 6 and the second connecting plate 12 to the steel column 7, an efficient connection between the reinforced structure and the existing steel structure is achieved, adapting to the stress characteristics of the beam-column joint, and effectively sharing and transmitting the service load and seismic force.

[0038] like Figure 1 As shown, the bolt assembly 4 includes a through-type high-strength bolt for connecting the H-shaped steel beam 6 and a single-sided high-strength bolt for connecting the steel column 7. The single-sided high-strength bolt has a flared nut at the end of the bolt to meet the single-sided fastening requirements of the box-shaped steel column.

[0039] Specifically, a bolt assembly 4, comprising through-type high-strength bolts and single-sided high-strength bolts, is used to connect the H-beam 6 and the steel column 7, respectively. A flared nut is installed at the end of the single-sided high-strength bolt, achieving precise adaptation and reliable connection for different types of steel components. The through-type high-strength bolts can penetrate the H-beam, providing stable bidirectional tightening force and ensuring a tight bond between the beam and the reinforced structure. The single-sided high-strength bolts, combined with the flared nuts, allow for tightening operations on one side of the box-section steel column, solving the problem of closed-section components being unable to be tightened on both sides, simplifying the construction process, and improving installation efficiency.

[0040] This application discloses a prefabricated, weld-free joint seismic reinforcement structure for steel structure engineering. In normal operating conditions, the bolt assembly 4, through pre-tightening force, tightly presses together the outer steel plate 2, the intermediate friction-dissipating steel plate 3, and the first connecting plate 11, forming a rigid connection capable of stably transmitting the operating load. When an earthquake occurs, the beam-column joint displaces. Due to the expansion joint 31, the intermediate friction-dissipating steel plate 3 can slide along the radial direction of the bolt, generating frictional resistance at the contact surface with the outer steel plate 2 and the first connecting plate 11. This converts the kinetic energy of the earthquake into heat energy for dissipation, thereby reducing component damage and effectively improving the seismic performance of the steel structure joint. In this application, by setting up an assembly form with all bolted connections, the advantages of welding-free reinforcement are achieved, avoiding the deterioration of steel performance and residual stress caused by high welding temperatures. No hot work is required, and construction can be carried out under load, significantly reducing construction risks and the requirements for operating space. Disassembly and maintenance are also more convenient in the later stages. By setting an intermediate friction energy-dissipating steel plate 3 between the first connecting plate 11 and the outer steel plate 2, and opening an expansion hole 31, and cooperating with the bolt assembly 4 for pre-tightening, the seismic energy dissipation function is achieved. Under normal use, the rigid connection of the bolt assembly 4 ensures the stable transmission of force in the structure. When an earthquake occurs, the intermediate friction energy-dissipating steel plate 3 can slide radially along the bolt through the expansion hole 31, using the friction between the steel plates to convert the seismic energy into heat energy, effectively reducing the peak seismic force and reducing damage to beam and column components.

[0041] 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.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A prefabricated, weld-free joint seismic reinforcement structure for steel structure engineering, comprising an L-shaped connecting plate (1), wherein the L-shaped connecting plate (1) includes a first connecting plate (11) and a second connecting plate (12), the first connecting plate (11) and the second connecting plate (12) being integrally formed and vertically arranged, and an outer steel plate (2) being provided on the outer side of the first connecting plate (11), characterized in that, An intermediate friction energy-dissipating steel plate (3) is provided between the first connecting plate (11) and the outer steel plate (2). A telescopic hole (31) is horizontally opened on the intermediate friction energy-dissipating steel plate (3). Bolt assemblies (4) are provided on both the first connecting plate (11) and the second connecting plate (12). The bolt assemblies (4) pass through the outer steel plate (2), the telescopic hole (31) and the first connecting plate (11) in sequence.

2. The prefabricated weldless joint seismic reinforcement structure for steel structure engineering according to claim 1, characterized in that, A triangular reinforcing plate (5) is provided between the first connecting plate (11) and the second connecting plate (12). The two right-angled sides of the reinforcing plate (5) are welded to the first connecting plate (11), the second connecting plate (12), and the outer steel plate (2), respectively.

3. The prefabricated weldless joint seismic reinforcement structure for steel structure engineering according to claim 1, characterized in that, The telescopic hole (31) is elliptical, and the major axis of the telescopic hole (31) is horizontal.

4. The prefabricated weldless joint seismic reinforcement structure for steel structure engineering according to claim 1, characterized in that, The surface of the intermediate friction energy-dissipating steel plate (3) is coated with a high friction coefficient coating with a thickness of 0.1 to 0.3 mm and a surface friction coefficient ≥ 0.5, which is used to enhance the friction energy dissipation effect between the steel plates.

5. The prefabricated weldless joint seismic reinforcement structure for steel structure engineering according to claim 1, characterized in that, The first connecting plate (11) is connected to the H-shaped steel beam (6), and the second connecting plate (12) is connected to the steel column (7).

6. The prefabricated weldless joint seismic reinforcement structure for steel structure engineering according to claim 5, characterized in that, The bolt assembly (4) includes a through-type high-strength bolt for connecting the steel beam (6) and a single-sided high-strength bolt for connecting the steel column (7). The end of the single-sided high-strength bolt is provided with a flared nut to meet the single-sided fastening requirements of the box-type steel column (7).

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