A self-centering swing energy dissipation device
By using a self-centering swing energy dissipation device that amplifies the displacement using a spring and combines friction and collision energy dissipation, it solves the energy dissipation demand for relatively small displacement in the cavity structure, achieves efficient seismic effect and self-reset function, and is suitable for cavity structures such as hollow thin-walled bridge piers.
Patent Information
- Application Number
- CN202411611881.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2044-11-13
AI Technical Summary
In the existing technology, hollow thin-walled bridge piers and other cavity structures have large available space but small relative displacement, and lack effective shock absorption measures, resulting in high energy consumption requirements and insufficient seismic performance.
A self-centering swing energy dissipation device is designed. It uses a spring to amplify the relative displacement of the structure, combines friction and collision energy dissipation, and absorbs seismic energy through the relative movement and collision of the friction pendulum and the annular block. Filling materials are used to enhance the energy dissipation effect.
It can effectively amplify the relative displacement of the structure, enhance the energy consumption capacity, reduce the damage to the structure caused by earthquakes, improve the seismic performance, and have the function of self-resetting, thus reducing the construction cost and complexity.
Smart Images
Figure CN119571716B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of structural vibration reduction, and in particular relates to a self-centering swing energy dissipation device suitable for a cavity structure. Background Art
[0002] With the development of transportation networks, the scale of high-rise building and bridge construction continues to increase. The increasing height of bridge piers has led to an increasingly wide range of applications for hollow thin-walled piers. Compared with traditional solid piers, hollow thin-walled piers, as an innovative structural form widely used in modern bridge engineering, have advantages such as light weight, high material utilization, and convenient construction. However, the seismic performance of high-rise buildings and bridge structures directly affects their safety and stability during natural disasters such as earthquakes. The seismic performance of high-rise buildings and bridge structures has always been a focus of attention in the construction field. Regarding how to reduce the impact of earthquakes on structures, the implementation of shock absorption measures has played a certain role. However, there is currently a lack of shock absorption measures for structures with large available space but small relative displacement. For example, hollow thin-walled super-high piers have high energy consumption requirements and large available space but insufficient available relative displacement. There is an urgent need for an energy-dissipating structure and device that can be used for the internal structure of hollow thin-walled piers. In view of this, the present invention proposes a self-centering swing energy dissipation device, which amplifies the relative displacement of the structure through a spring and absorbs seismic energy in multiple directions, thereby achieving better energy dissipation effect. It is suitable for locations such as hollow thin-walled piers, cylindrical structures with large space but small relative displacement, and the inside of box girders. Summary of the Invention
[0003] To address the above-mentioned issues, the present invention provides a self-centering swing energy dissipation device suitable for cavity structures. When an earthquake occurs, the device can amplify the relative displacement of the structure through a spring, using friction and collision energy dissipation to help the controlled structure dissipate some of the seismic energy, thereby reducing earthquake damage to the controlled structure. At the same time, it also has a certain self-reset function, improving the structure's seismic resistance under external forces such as earthquakes, thereby ensuring the safety of the structure. The present invention adopts the following technical solutions:
[0004] A self-centering swing energy dissipation device for a cavity structure comprises: a concave spherical base 2, an L-shaped reserved angle steel 3, an annular block 4, a spring 5, a bolt 6, a friction pendulum 7, a cavity 9, and a filling material 10. The concave spherical base 2 is anchored to the bottom plate of the L-shaped reserved angle steel 3; the L-shaped reserved angle steel 3 is fixed to the inner wall of the controlled structure 1 via bolts 6 using bolt holes reserved in the side plates; the friction pendulum 7 is placed on the concave spherical base 2 and contacts its inner wall to form a friction surface; the top end of the friction pendulum 7 is connected to the inner wall of the controlled structure 1 via a spring 5; the annular block 4 is fixed to the top of the concave spherical base 2 via bolts 6. Under the action of external forces such as earthquakes, the basic seismic force and the seismic force amplified by the spring 5 provide the friction pendulum 7 with an initial inertial force, causing the friction pendulum 7 to shake and dissipate part of the energy through friction with the concave spherical base 2; when the friction pendulum 7 collides with the annular stopper 4, the annular stopper 4 absorbs a certain amount of energy through deformation; at the same time, the annular stopper 4 and the filling material 10 in the cavity 9 of the friction pendulum 7 produce relative motion and friction through collision, generating a damping effect to further absorb and disperse the seismic energy, thereby improving the energy consumption capacity of the device.
[0005] Furthermore, the contact surface between the concave spherical base 2 and the friction pendulum 7 is made of a high-friction material, dissipating energy through friction during relative rotation. Furthermore, the interiors of the friction pendulum 7 and the annular stopper 4 can be configured as cavities based on energy dissipation requirements. These cavities can be filled with energy-dissipating fillers as needed. When the friction pendulum 7 collides with the annular stopper 4, the filler material 10 within them collides and rubs against each other, further absorbing and dissipating energy.
[0006] Furthermore, the concave spherical base 2 can be set separately in the cavity 9 in an additional manner, or the transition section of the hollow cavity can be used. At this time, the interior of the transition section can be set as a spherical cavity, with bolt holes reserved on the top and a concave spherical surface in the middle. The entire spherical surface can be lubricated with lubricant or treated with high friction coefficient materials according to energy consumption requirements. The base is further fixed by L-shaped reserved angle steels 3 on both sides.
[0007] Furthermore, the spring 5 is arranged in a ring at the upper end of the friction pendulum 7, either in tension or compression. Its ends are anchored to the friction pendulum 7 and the controlled structure, respectively, through a specific connection method. Under external forces such as earthquakes, the spring 5 is disturbed, amplifying the relative displacement of the structure through the vertical rod of the friction pendulum 7. The spring 5 also serves a self-resetting function. The number of springs and their initial deformation can be adjusted according to the needs of the controlled structure.
[0008] Furthermore, the annular stopper 4 can be made of materials such as rubber, steel, or concrete, and is fixed to the top of the concave spherical base 2 by bolts 6, with a certain distance between it and the friction pendulum 7. The end of the annular stopper 4 near the friction pendulum 7 is a hollow structure. The hollow structure can be a cavity or contain a special filling material 10. At the same time, its ends are tilted at a certain angle, and the upper and lower edges are rounded.
[0009] Furthermore, the outer surface of the friction pendulum 7 in contact with the concave spherical base 2 can also be lubricated with a lubricant or made of a high friction coefficient material according to energy consumption requirements; the internal cavity of the friction pendulum 7 and the annular stopper 4 can be filled with water, particles or viscous liquid.
[0010] Furthermore, bolt holes are reserved on the side plates of the L-shaped reserved angle steel 3, and the shock-absorbing and energy-absorbing device involved in the invention can be fixed by bolts 6 in positions such as hollow thin-walled piers, cylindrical structures with large space but small relative displacement, and the inside of box beams.
[0011] The beneficial effects of the technical solution provided by the present invention are:
[0012] The concave spherical base and the two spherical surfaces of the friction pendulum in the present invention can be amplified by the pre-tension and pre-compression springs at the top of the friction pendulum under the action of an earthquake, and can rotate relative to each other by utilizing the relative movement between the controlled structure spring and the two sides of the base, thereby absorbing, tuning and dissipating the kinetic energy of the controlled structure.
[0013] The friction pendulum structure in the present invention can be set as a hollow structure according to energy consumption requirements. Filling materials such as water, particles or viscous liquids can be placed in the cavity. When shaking or colliding occurs, energy consumption can be further increased through relative movement and friction between each other.
[0014] The annular stopper in the present invention can be made of high-damping, high-ductility materials such as rubber according to energy dissipation requirements. Under the action of an earthquake, the friction pendulum can collide with the annular stopper, further absorbing and dissipating the kinetic energy transmitted to the friction pendulum by the controlled structure; and the hollow structure at the end of the annular stopper can also be set as a cavity, and filled with water, particles or viscous liquids, etc., when it is hit by the friction pendulum, the energy dissipation capacity of the structure can be further increased.
[0015] The present invention can be placed in the inner cavity of a controlled structure and can utilize the relative displacement of different structural layout positions. The device has the advantages of simple structure, high practicality, strong compatibility, good coordination, low cost, and convenient construction. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The present invention will be further described below with reference to the accompanying drawings and examples.
[0017] Figure 1This is a transverse overall cross-sectional view of a self-centering swing energy dissipation device placed in a controlled structure, taking a hollow thin-walled bridge pier as an example;
[0018] Figure 2 It is a plan diagram of the shock absorption and energy dissipation device;
[0019] Figure 3 It is a three-dimensional schematic diagram of the shock-absorbing and energy-absorbing device.
[0020] In the figure: 1. Controlled structure, 2. Concave spherical base, 3. L-shaped reserved angle steel, 4. Ring stopper, 5. Spring, 6. Bolt, 7. Friction pendulum, 8. Friction surface, 9. Cavity, 10. Filling material. DETAILED DESCRIPTION
[0021] The following is combined with Figure 1 -Attached Figure 3 The concept and specific details of the present invention are further described:
[0022] The present invention provides a self-centering swing energy dissipation device placed inside a cavity structure. This device can effectively reduce the vibration amplitude of the controlled structure during an earthquake, reduce the risk of structural deformation and damage, and thus improve its seismic energy dissipation capacity. The device has the advantages of simple structure, easy installation, and relatively low cost, and is suitable for seismic retrofitting and new construction of cavity structures. Figures 1 to 3 As shown, and described in detail below: A swing energy dissipation device placed inside a cavity structure includes a concave spherical base 2, an L-shaped reserved angle steel 3, an annular block 4, a spring 5, a bolt 6, a friction pendulum 7, a friction surface 8, a cavity 9, and a filling material 10. The controlled structure selected in this embodiment is a hollow thin-walled concrete bridge pier, but the swing energy dissipation device is also applicable to other cavity structures.
[0023] like Figures 1 to 3As shown, the overall appearance of the concave spherical base 2 is a rectangular parallelepiped with a concave spherical surface in the middle, which is fixed to the bottom plate of the L-shaped reserved angle steel 3; the lower part of the friction pendulum 7 is a hollow hemisphere, and the upper part is a cylinder. The bottom of the hollow sphere of the friction pendulum 7 and the spherical surface of the concave spherical base 2 are both made of materials with a high friction coefficient, forming a friction surface 8, which consumes energy through friction between the two; the top of the concave spherical base 2 reserves the required through holes for bolts, and the annular stopper 4 made of rubber material is fixed to the top of the concave spherical base 2 by bolts 6, and the annular stopper 4 and the friction pendulum 7 are connected. A certain distance is reserved between the annular stopper 4 and the friction pendulum 7. Filling materials such as water, particles or viscous liquid can be placed in the cavity of the annular stopper 4 and the friction pendulum 7. The viscosity and fluidity of the viscous liquid can be adjusted to achieve control of the earthquake response; a spring 5 is arranged in a ring at the upper end of the friction pendulum 7, and its two ends are anchored to the friction pendulum 7 and the inner wall of the controlled structure 1 respectively. The number and compression or stretching amount can be adjusted according to actual conditions to meet the seismic requirements of the bridge structure; bolt holes are reserved on the side plates of the L-shaped reserved angle steel 3, and the entire device is fixed to the inner wall of the controlled structure 1 by bolts 6.
[0024] Specifically, the principle of the swing energy dissipation device in the above example is that when an earthquake occurs, the hollow thin-walled pier 1 is affected by the earthquake, and the pier will produce relative displacement with the foundation, and the spring 5 in a stretched or compressed state will be disturbed, which will amplify the seismic force. At this time, the friction pendulum obtains inertial force under the dual action of the foundation earthquake and the spring force and shakes. The number and deformation of the spring 5 can be adjusted according to actual conditions to meet the needs; when shaking, the bottom of the friction pendulum 7 and the spherical surface of the concave spherical base 2 rub against each other. The higher the friction coefficient of the friction surface 8 material, the more seismic energy it will consume. At the same time, the filling material in the cavity at the bottom of the friction pendulum 7 will also shake, absorbing and Dissipates energy and enhances the energy dissipation capacity of the structure; as the swing amplitude changes, the friction pendulum 7 collides and contacts with the annular stopper 4, and the hollow annular stopper 4 made of rubber material absorbs part of the seismic energy through compression deformation. Under the collision, the filling material in the cavity of the annular stopper 4 will also undergo relative movement and collision, thereby further dissipating more seismic energy. The end of the annular stopper 4 close to the friction pendulum is tilted and rounded, and the end of the lower hemispherical body of the friction pendulum 7 is also rounded, which further reduces the damage to the friction pendulum 7 and the annular stopper 4 during the collision; at the same time, the spring 5 arranged in a ring at the upper end of the friction pendulum is squeezed and stretched under the swing of the friction pendulum 7, which can achieve a self-resetting effect.
Claims
1. A swing energy dissipation device placed inside a cavity structure, characterized in that: include: A concave spherical base (2), an L-shaped reserved angle steel (3), an annular stopper (4), a spring (5), a bolt (6), a friction pendulum (7), a friction surface (8), a cavity (9) and a filling material (10); bolt holes are reserved on the side plate of the L-shaped reserved angle steel (3), and the L-shaped reserved angle steel (3) is fixed to the inner wall of the controlled structure (1) by means of bolts (6); the concave spherical base (2) is anchored on the bottom plate of the L-shaped reserved angle steel (3); the hollow hemisphere of the friction pendulum (7) contacts the spherical surface of the concave spherical base (2) to form a friction contact surface; bolt holes are reserved on the top of the concave spherical base (2), and the annular stopper (4) is fixed to the concave spherical base by means of bolts (6), and a certain distance is reserved from the upper structure of the friction pendulum (7); a spring (5) is arranged in an annular manner at the upper end of the friction pendulum (7), and its two ends are anchored to the friction pendulum (7) and the inner wall of the controlled structure respectively; The interior of the friction pendulum (7) and the annular stopper (4) is a hollow structure, and the interior of the cavity is filled with energy-consuming fillers. When the friction pendulum (7) collides with the annular stopper (4), the internal fillers undergo relative motion and friction to produce a damping effect.
2. The swing energy dissipation device placed inside a cavity structure according to claim 1, characterized in that: The concave spherical base (2) is provided in the hollow cavity by an additional attachment method in the form of a concave spherical surface in the middle of a solid body, or the internal structure of the hollow cavity is used as a transition section of the spherical cavity. The entire spherical surface is lubricated with a lubricant or treated with a high friction coefficient material, and a bolt hole is reserved on the top for fixing the annular stopper (4).
3. The swing energy dissipation device placed inside a cavity structure according to claim 1, characterized in that: A spring (5) in a tensioned or compressed state is arranged in a ring at the upper end of the friction pendulum (7), and its two ends are anchored on the friction pendulum (7) and the inner wall of the controlled structure (1), respectively.
4. The swing energy dissipation device placed inside a cavity structure according to claim 1, characterized in that: The annular stopper (4) is made of rubber material and is fixed to the concave spherical base (2) by means of bolts (6). One end close to the friction pendulum (7) is provided with a hollow structure to increase its deformation capacity and improve energy absorption. At the same time, a movable distance is reserved between the annular stopper (4) and the friction pendulum (7). The end of the annular stopper (4) is provided with an inclined angle and a rounded end treatment to reduce damage to the friction pendulum during collision.
5. The swing energy dissipation device placed inside a cavity structure according to claim 1, characterized in that: The outer surface of the friction pendulum (7) in contact with the concave spherical base (2) is lubricated with a lubricant or a material with a high friction coefficient; the filling material of the internal cavity of the friction pendulum (7) and the annular stopper (4) is water, particles or viscous liquid.
6. The swing energy dissipation device placed inside a cavity structure according to claim 1, characterized in that: The swing energy dissipation device is fixed as a whole on the bottom plate of the L-shaped reserved angle steel (3), and the side plates of the L-shaped reserved angle steel (3) are provided with bolt holes for fixing the device at any position inside the controlled structure via bolts (6).