A horizontal displacement control structure for a base-isolated building

Abstract

The application relates to a horizontal displacement control structure for a seismic isolation building, which is installed outside a seismic isolation support in a seismic isolation layer of the building and comprises a pre-warning reset assembly, a limiting wall and a damping module. The pre-warning reset assembly is arranged adjacent to the seismic isolation support and is used for pre-warning the horizontal displacement of the building. A first buffer gap is formed between the pre-warning reset assembly and a top plate of the seismic isolation layer. The limiting wall is vertically arranged in the seismic isolation layer and is arranged outside the pre-warning reset assembly. The damping module is arranged on one side of the limiting wall close to the pre-warning reset assembly, and a second buffer gap is formed between the damping module and the top plate of the seismic isolation layer. In the horizontal displacement control structure for the seismic isolation building, the pre-warning reset assembly, the damping module and the limiting wall are arranged outside the seismic isolation support according to the distance, a multistage buffer is formed, the buffer gap can consume the horizontal seismic force, and the safety performance of the seismic isolation building under a large earthquake is improved.

Description

Technical Field

[0001] This invention relates to the field of seismic resistance technology for building structures, and specifically to a horizontal displacement control structure for seismic isolation buildings. Background Technology

[0002] Seismic isolation technology can effectively reduce the seismic response of the superstructure, but the isolation layer may experience excessive horizontal displacement under strong earthquakes, leading to risks such as support instability and pipeline damage. Traditional reinforced concrete retaining walls, as the last line of defense, have the problem of rigid impact in a "head-on" manner, which may cause secondary damage to the isolation layer and the superstructure.

[0003] In existing technologies, some independent energy-consuming devices can consume energy, but they have poor coordination with the main limiting structure and lack absolute safety guarantees under super-intensity earthquakes.

[0004] It is particularly important to note that traditional limiting devices have several key technical problems: First, horizontal seismic forces are difficult to effectively transmit to energy-consuming components; second, the preload of the friction pair is lost due to material creep; and finally, there is a lack of clear division of labor and collaborative working mechanism among the various protective components. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a horizontal displacement control structure for seismic isolation buildings. This solves the problems that existing limiting devices cannot effectively transmit seismic forces in the horizontal direction to energy-consuming components, the preload of friction pairs is lost due to material creep, and there is a lack of clear division of labor and collaborative working mechanism among the various protective components.

[0006] The technical solution to achieve the above objective is: a horizontal displacement control structure for seismic isolation buildings, installed on the outside of the seismic isolation bearing in the seismic isolation layer of the building, comprising: an early warning and reset component, wherein the early warning and reset component is disposed adjacent to the seismic isolation bearing and is used to provide early warning of horizontal displacement of the building, and a first buffer gap is formed between the early warning and reset component and the top plate of the seismic isolation layer; a limiting wall, wherein the limiting wall is vertically disposed within the seismic isolation layer and is disposed on the outside of the early warning and reset component; and an energy dissipation module, wherein the energy dissipation module is disposed on the side of the limiting wall close to the early warning and reset component, and a second buffer gap is formed between the energy dissipation module and the top plate of the seismic isolation layer.

[0007] In the horizontal displacement control structure for seismic isolation buildings of the present invention, a multi-level buffer is formed by setting early warning reset components, energy dissipation modules and limiting walls at intervals on the outside of the seismic isolation bearing. The set buffer gaps can dissipate the seismic force in the horizontal direction, thereby improving the safety performance of the seismic isolation building under a major earthquake.

[0008] A further improvement of the present invention on a horizontal displacement control structure for seismic isolation buildings is that the early warning and reset component includes: a reset module, which is an elastic structure; and an early warning module, which is disposed in the reset module and issues an alarm when triggered by force.

[0009] A further improvement of the present invention for a horizontal displacement control structure for seismic isolation buildings is that the energy dissipation component includes: a support frame that converts horizontal seismic forces into axial pressure; a sliding friction pair disposed on the outer frame near the seismic isolation bearing; and a metal yield energy dissipator disposed inside the support frame, the metal yield energy dissipator bearing the axial pressure transmitted by the support frame.

[0010] A further improvement of the horizontal displacement control structure for seismic isolation buildings of the present invention is that the sliding friction pair includes: a pressure plate, the pressure plate being connected to the support frame; a polytetrafluoroethylene (PTFE) plate, the PTFE plate being attached to the inner side of the pressure plate; and a steel plate, the steel plate being disposed opposite to the PTFE plate.

[0011] A further improvement of the horizontal displacement control structure for seismic isolation buildings of the present invention is that the sliding friction pair further includes a prestressed bolt group, wherein the prestressed bolt group is provided with a disc spring for applying and maintaining the interface positive pressure.

[0012] A further improvement of the horizontal displacement control structure for seismic isolation buildings of the present invention is that a radial working gap is provided between the prestressed bolts and the bearing plate.

[0013] A further improvement of the horizontal displacement control structure for seismic isolation buildings of the present invention is that the metal yield energy dissipator is a multi-concentric ring hoop structure.

[0014] A further improvement of the horizontal displacement control structure for seismic isolation buildings of the present invention is that the sliding friction pair and the metal yield energy dissipator are mechanically connected in series, and the yield force threshold of the metal yield energy dissipator is greater than the sliding friction force of the sliding friction pair.

[0015] A further improvement of the horizontal displacement control structure for seismic isolation buildings of the present invention is that the limiting wall includes a first wall and a second wall; the first wall and the second wall are arranged in a T-shape.

[0016] A further improvement of the present invention for a horizontal displacement control structure for seismic isolation buildings is that the impact surface of the first wall is covered with a replaceable buffer layer. Attached Figure Description

[0017] Figure 1This is a schematic diagram of a horizontal displacement control structure for seismic isolation buildings according to the present invention.

[0018] Figure 2 This is a cross-sectional view of the limiting wall of the present invention.

[0019] In the diagram: 10. Early warning reset component; 11. Energy consumption module; 12. Limiting wall; 121. First wall; 122. Second wall; 20. Seismic isolation bearing; 21. Top plate; 22. Upper column pier. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] See Figure 1 This image shows a schematic diagram of a horizontal displacement control structure for seismic isolation buildings according to the present invention. The present invention provides a horizontal displacement control structure for seismic isolation buildings, installed on the outside of a seismic isolation bearing 20 in the building's seismic isolation layer. It includes: a warning reset component 10, which is disposed adjacent to the seismic isolation bearing 20 and is used to provide warnings of horizontal displacement of the building. A first buffer gap is formed between the warning reset component 10 and the top plate 21 of the seismic isolation layer.

[0022] The seismic isolation bearing 20 is installed between the column piers, and the early warning reset component 10 is arranged around the seismic isolation bearing 20 on the outside of the upper column pier 22. The early warning trigger indicates that the building has experienced horizontal displacement. The early warning reset component 10 is a flexible suction structure that can absorb small-energy seismic forces in the horizontal direction.

[0023] The limiting wall 12 is vertically installed inside the seismic isolation layer and is located outside the early warning reset component 10. A seismic isolation space is maintained between the top of the limiting wall 12 and the top plate 21 of the seismic isolation layer.

[0024] Among them, the limiting wall 12 is formed by pouring reinforced concrete, and the limiting wall 12 is the ultimate limiting structure.

[0025] Energy dissipation module 11 is installed on the side of the limiting wall 12 near the early warning reset component 10, and a second buffer gap is formed between the energy dissipation module 11 and the top plate 21 of the vibration isolation layer.

[0026] The energy-consuming module 11 is located on the side of the limiting wall 12 near the early warning reset component 10. The energy-consuming module 11 is a modular box-type unit pre-assembled in the factory and can be connected to the limiting wall 12 by high-strength bolts. The second buffer gap above the energy-consuming module 11 is connected to the vibration isolation space above the limiting wall 12.

[0027] In this embodiment, the first initial gap value between the early warning reset component 10 and the superstructure is H1, which is 1.1-1.3 times the design displacement of the seismic isolation layer. The second initial gap value between the energy dissipation component and the superstructure is H2, which is 1.5-2.0 times the design displacement of the seismic isolation layer. The second initial gap value H2 is set to be greater than the first initial gap H1. The gap values ​​are determined through nonlinear time history analysis to ensure that each component is triggered in the design sequence; specific settings are not provided here.

[0028] In this embodiment, a third buffer gap is formed.

[0029] In this embodiment, the horizontal displacement control structure is located between the upper and lower structures of the seismic isolation layer and works in conjunction with the seismic isolation bearing 20. The early warning reset component 10, the energy dissipation module 11, and the limiting wall 12 are arranged along the horizontal displacement direction. Through a multi-level triggering mechanism, a smooth transition from flexible energy dissipation to rigid limiting is achieved, avoiding the rigid impact problem of the traditional limiting wall 12.

[0030] The present invention provides a horizontal displacement control structure for seismic isolation buildings. The early warning reset component 10 includes a reset module, which is an elastic structure.

[0031] The reset module is recoverable under stress.

[0032] The early warning module is located within the reset module. When the early warning module is triggered by force, it issues an alarm.

[0033] The early warning module includes a pressure sensor and a signal transmitting unit. The pressure sensor is connected to the signal transmitting unit, and the signal transmitting unit sends a signal indicating that the building has undergone horizontal displacement after being triggered.

[0034] The present invention provides a horizontal displacement control structure for seismic isolation buildings, the energy dissipation component including: a support frame, which converts horizontal seismic forces into axial pressure.

[0035] Specifically, a rigid support frame converts horizontal seismic forces into axial pressure acting on the metal yield energy dissipator. This support frame transforms the horizontal load borne by the load-bearing plate into a pair of axial pressures acting on the upper and lower end plates of the metal yield energy dissipator. The rigid support frame effectively achieves force direction conversion, enabling the yielder to achieve optimal energy dissipation performance under axial pressure.

[0036] The sliding friction pair is located on the outer frame near the seismic isolation bearing 20.

[0037] The metal yield energy dissipator is located inside the support frame and bears the axial pressure transmitted by the support frame.

[0038] Among them, the metal yield energy dissipator dissipates energy through the plastic deformation of metal.

[0039] In this embodiment, the right side of the support frame pushes the upper end plate of the metal yield energy dissipator downward, while the left side of the support frame abuts against the lower end plate of the metal yield energy dissipator to provide an upward reaction force, converting the horizontal thrust into axial pressure on the metal yield energy dissipator.

[0040] This invention provides a horizontal displacement control structure for seismic isolation buildings, wherein the sliding friction pair includes a pressure plate and the pressure plate is connected to a support frame.

[0041] Polytetrafluoroethylene (PTFE) sheet, which is attached to the inside of the pressure plate.

[0042] Steel plate, with the steel plate and polytetrafluoroethylene plate placed opposite each other.

[0043] In this embodiment, regarding the problem of horizontal force transmission, the mechanism by which the support frame converts horizontal force into axial pressure is as follows: (1) The frame converts the horizontal load borne by the load-bearing plate into a pair of axial pressures acting on the upper and lower end plates of the metal yield energy dissipator through its internal force path; (2) The upper end plate of the yielding device is subjected to downward pressure, and the lower end plate is subjected to upward reaction force; (3) Through this mechanism, the horizontal displacement is efficiently converted into the axial compressive deformation of the yield, so that the yield works under optimal stress.

[0044] In this embodiment, the prestressed bolts pass sequentially through the large-diameter holes on the bearing plate and the bolt holes on the force transmission rib, and are finally anchored to the support frame at the rear end of the module.

[0045] The present invention provides a horizontal displacement control structure for seismic isolation buildings. The sliding friction pair further includes a prestressed bolt group, in which a disc spring is provided to apply and maintain the interface positive pressure.

[0046] The preload of the sliding friction pair is provided by a prestressed bolt containing a disc spring assembly. The disc springs compensate for preload loss caused by material creep or wear. The prestress of the disc springs effectively solves the problem of preload loss caused by PTFE material creep, ensuring the long-term reliability of the sliding friction pair.

[0047] This invention provides a horizontal displacement control structure for seismic isolation buildings, wherein a radial working gap is provided between the prestressed bolts and the bearing plate.

[0048] Among them, a radial working gap is maintained between the large-diameter smooth hole on the bearing plate and the prestressed bolt rod. This gap ensures that the prestressed bolt applies and maintains the interface normal pressure without creating any rigid constraint on the sliding movement of the sliding friction pair, thus ensuring free sliding.

[0049] This invention provides a horizontal displacement control structure for seismic isolation buildings, wherein the metal yield energy dissipator is a multi-concentric ring hoop structure.

[0050] Among them, the sequential yielding mechanism of the multi-concentric ring type yielder provides a full and stable force-displacement energy dissipation platform, overcoming the defect that the energy dissipation capacity of a single yielder decreases with the increase of displacement.

[0051] In this embodiment, the metal yield energy dissipator consists of 2-4 concentric steel rings and connecting spokes. The thickness of the spokes is less than the thickness of the steel rings to ensure that plastic deformation preferentially occurs in the spokes. The spokes are evenly distributed in the circumferential direction, with a quantity of 8-16.

[0052] In this embodiment, the multi-concentric ring-type yielding device provides a stable plastic energy dissipation platform through the sequential yielding mechanism of the outer ring plate, the middle ring plate, and the inner ring plate.

[0053] In this embodiment, the working mechanism of the metal yield energy dissipator is as follows: (1) During the elastic deformation stage, the entire structure is in an elastic state; (2) During the yield initiation stage, the outermost ring's spokes are the first to enter the plastic yield state; (3) During the main energy dissipation stage, as the displacement increases, the spokes of the middle ring and inner ring successively enter plastic yielding, forming a stable energy dissipation platform; (4) During the strengthening stage, after all the spokes of the rings have yielded, the rings begin to contact each other, and the stiffness increases again.

[0054] This invention provides a horizontal displacement control structure for seismic isolation buildings, in which a sliding friction pair and a metal yield energy dissipator are mechanically connected in series, and the yield force threshold of the metal yield energy dissipator is greater than the sliding friction force of the sliding friction pair.

[0055] See Figure 2 The image shows a transverse sectional view of the limiting wall 12 of the present invention. The present invention provides a horizontal displacement control structure for seismic isolation buildings. The limiting wall 12 includes a first wall 121 and a second wall 122, which are arranged in a T-shape.

[0056] The first wall 121 is disposed opposite to the warning reset component 10. The second wall 122 is disposed on the side of the first wall 121 away from the warning reset component 10, and the second wall 122 is disposed perpendicular to the first wall 121.

[0057] In this embodiment, the energy-consuming module 11 is disposed on the first wall 121 on the side near the early warning reset component 10.

[0058] The present invention provides a horizontal displacement control structure for seismic isolation buildings, wherein the impact surface of the first wall 121 is covered with a replaceable buffer layer.

[0059] The buffer layer can be made of aluminum foam or ultra-high molecular weight polyethylene board; no specific restrictions are imposed. The buffer layer further absorbs residual energy through compression deformation, reducing the impact effect.

[0060] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A horizontal displacement control structure for seismic isolation buildings, characterized in that, Installed on the outside of the seismic isolation bearing in the building's seismic isolation layer, including: The early warning reset component is disposed adjacent to the seismic isolation support and is used to provide early warning of horizontal displacement of the building. A first buffer gap is formed between the early warning reset component and the top plate of the seismic isolation layer. A limiting wall is vertically installed inside the seismic isolation layer and is located outside the early warning reset component; An energy-consuming module is disposed on the side of the limiting wall near the early warning reset component, and a second buffer gap is formed between the energy-consuming module and the top plate of the vibration isolation layer.

2. The horizontal displacement control structure for seismic isolation buildings according to claim 1, characterized in that, The warning reset component includes: A reset module, wherein the reset module is a flexible structure; An early warning module is included in the reset module. The early warning module issues an alarm when triggered by force.

3. A horizontal displacement control structure for seismic isolation buildings according to claim 1, characterized in that, The energy-consuming components include: A support frame that converts horizontal seismic forces into axial pressure. A sliding friction pair is provided on the outer frame near the seismic isolation support. A metal yield energy dissipator is disposed inside the support frame and bears the axial pressure transmitted by the support frame.

4. A horizontal displacement control structure for seismic isolation buildings according to claim 3, characterized in that, The sliding friction pair includes: A pressure plate, which is connected to the support frame; A polytetrafluoroethylene (PTFE) sheet is attached to the inner side of the pressure plate; A steel plate, wherein the steel plate is disposed opposite to the polytetrafluoroethylene plate.

5. A horizontal displacement control structure for seismic isolation buildings according to claim 4, characterized in that, The sliding friction pair also includes a prestressed bolt assembly, which is equipped with a disc spring for applying and maintaining the interface positive pressure.

6. A horizontal displacement control structure for seismic isolation buildings according to claim 5, characterized in that, A radial working gap is provided between the prestressed bolt and the bearing plate.

7. A horizontal displacement control structure for seismic isolation buildings according to claim 3, characterized in that, The metal yield energy dissipator has a multi-concentric ring structure.

8. A horizontal displacement control structure for seismic isolation buildings according to claim 3, characterized in that, The sliding friction pair and the metal yield energy dissipator are mechanically connected in series, and the yield force threshold of the metal yield energy dissipator is greater than the sliding friction force of the sliding friction pair.

9. A horizontal displacement control structure for seismic isolation buildings according to claim 1, characterized in that, The limiting wall includes a first wall and a second wall; The first wall and the second wall are arranged in a T-shape.

10. A horizontal displacement control structure for seismic isolation buildings according to claim 1, characterized in that, The impact surface of the first wall is covered with a replaceable buffer layer.

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