Self-centering swing energy consumption device

Abstract

The invention discloses a self-centering swing energy consumption device suitable for a cavity structure. Comprising a concave spherical base, L-shaped reserved angle steel, an annular stop block, a spring, a bolt, a friction pendulum, a cavity and a filling material. The concave spherical base is anchored on a bottom plate of the L-shaped reserved angle steel; the L-shaped reserved angle steel is fixed to the inner wall of the controlled structure through bolt holes reserved in the side plates. The friction pendulum is placed in the concave spherical base and contacts with the concave spherical base to form a friction surface, and the top end is connected with the inner wall of the controlled structure through a spring; and the annular baffle block is fixed at the top of the concave spherical base through a bolt. Under the action of external force such as earthquakes, part of energy is dissipated through friction with the concave spherical base; when the friction pendulum collides with the annular stop block, the annular stop block absorbs certain energy through deformation; the filling materials in the two cavities of the annular check block and the friction pendulum absorb and disperse earthquake energy through the damping effect. The system is simple in structure, high in practicability, strong in compatibility and good in coordination.

Description

Technical Field

[0001] The invention belongs to the technical field of structural shock absorption, 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 structure construction continues to increase. The increasing height of bridge piers has led to a wider application range of 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 the advantages of light weight, high material utilization rate, and convenient construction. However, the quality of the seismic performance of high-rise buildings and bridge structures directly affects their safety and stability in natural disasters such as earthquakes. The seismic performance of high-rise buildings and bridge structures has always been the 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, but there is currently a lack of shock absorption measures for large available space but small relative displacement, such as: hollow thin-walled super-high piers have high energy consumption requirements, large available space but insufficient available relative displacement), and there is an urgent need for an energy-consuming 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 a better energy dissipation effect. The device 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 solve the above problems, 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, and use friction energy dissipation and collision energy dissipation to help the controlled structure consume part of the earthquake energy, thereby reducing the damage to the controlled structure caused by the earthquake. At the same time, it also has a certain self-reset function, which improves the seismic resistance of the structure under the action of 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, comprising: 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 cavity 9, and a filling material 10. The concave spherical base 2 is anchored on 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 by bolts 6 using bolt holes reserved in the side plates; the friction pendulum 7 is placed on the concave spherical base 2 and contacts the inner wall thereof to form a friction surface, and the top of the friction pendulum 7 is connected to the inner wall of the controlled structure 1 through the spring 5; the annular stopper 4 is fixed to the top of the concave spherical base 2 by 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, and the friction pendulum 7 shakes and dissipates 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 filling material 10 in the cavity 9 of the annular stopper 4 and the friction pendulum 7 undergoes 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 material with a high friction coefficient, and the two consume energy through friction when they rotate relative to each other. At the same time, the interior of the friction pendulum 7 and the annular stopper 4 can be set as a cavity structure according to energy consumption requirements, and the interior of the cavity can be filled with energy-consuming fillers as needed. When the friction pendulum 7 collides with the annular stopper 4, the filling materials 10 inside can collide and rub against each other, further absorbing and dissipating energy.

[0006] Furthermore, the concave spherical base 2 can be separately set in the cavity 9 in an additional manner, or it can utilize the transition section of the hollow cavity. In this case, 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 lubricants 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 in a state of tension or compression, and is arranged in a ring at the upper end of the friction pendulum 7, and the two ends are respectively anchored to the friction pendulum 7 and the controlled structure through a certain connection method. Under the action of external forces such as earthquakes, the spring 5 will be disturbed, and the relative displacement of the structure will be amplified through the vertical rod of the friction pendulum 7. At the same time, the spring 5 also has a self-reset function, and its number and 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, concrete, etc., and is fixed to the top of the concave spherical base 2 by bolts 6, and a certain distance is reserved between the annular stopper 4 and the friction pendulum 7. The end of the annular stopper 4 close to the friction pendulum 7 is a hollow structure, which can be a hollow cavity or a special filling material 10, and its end has a certain inclination 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 material with a high friction coefficient 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 liquids.

[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 spaces but small relative displacements, 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, and filling materials such as water, particles or viscous liquids can be placed in the cavity. When shaking or colliding occurs, the energy consumption can be further increased through relative movement and friction between each other.

[0014] The annular stopper in the present invention can select high damping and 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 filling materials such as water, particles or viscous liquids can be placed in it, which can further increase the energy dissipation capacity of the structure when it is hit by the friction pendulum.

[0015] The present invention can be placed in the inner cavity of a controlled structure and can utilize the relative displacement of different structural arrangement positions. The device has the advantages of simple structure, high practicality, strong compatibility, good coordination, low cost, convenient construction, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1It 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 view of the shock absorbing and energy dissipating 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. annular 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, which can effectively reduce the vibration amplitude of the controlled structure during an earthquake, reduce the deformation and damage risks of the structure, and thus improve its earthquake resistance and energy dissipation capacity. The device has the advantages of simple structure, easy installation, and relatively low cost, and is suitable for earthquake-resistant reconstruction and new construction of cavity structures. Figures 1 to 3 As shown, see the following description for details: A swing energy dissipation device placed inside a cavity structure comprises 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. The controlled structure selected in this embodiment is a concrete hollow thin-walled bridge pier, and 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, fixed on 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 to form a friction surface 8, and energy is consumed through the friction between the two; the top of the concave spherical base 2 reserves the through holes required for the 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 respectively anchored to the friction pendulum 7 and the inner wall of the controlled structure 1, and 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 and shakes under the dual effects of the foundation earthquake and the spring force. 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; with the change of the shaking amplitude, 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 shaking of the friction pendulum 7, so as to achieve the effect of self-resetting.

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 concave spherical base (2) is fixed to the inner wall of the controlled structure (1) by bolts (6); the concave spherical base (2) is anchored on the bottom plate of the L-shaped reserved angle steel (3); the hollow hemispherical surface of the friction pendulum (7) and the spherical surface of the concave spherical base (2) contact 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 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 respectively anchored to the friction pendulum (7) and the inner wall of the controlled structure.

2. A swing energy dissipation device placed inside a cavity structure according to claim 1, characterized in that: The interior of the friction pendulum (7) and the annular stopper (4) is configured as a cavity structure according to energy consumption requirements, and the interior of the cavity is filled with energy consumption fillers as required. When the friction pendulum (7) collides with the annular stopper (4), the internal fillers undergo relative motion and friction to produce a damping effect, absorbing and dissipating seismic energy, thereby improving the energy consumption capacity of the device and reducing the seismic response of the structure.

3. A 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 middle of a solid body with a concave spherical surface and is separately arranged in the hollow cavity by an additional attachment, 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 according to energy consumption requirements, and a bolt hole is reserved on the top for fixing the annular stopper (4).

4. 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 respectively anchored on the friction pendulum (7) and the inner wall of the controlled structure (1). The number and deformation of the spring (5) are adjusted according to actual conditions to meet the seismic requirements of the structure. The seismic force is amplified by the spring (5) to provide the friction pendulum (7) with an inertial force for initial movement, and at the same time, the structure is provided with a self-resetting capability.

5. 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). The end close to the friction pendulum (7) is arranged as a hollow structure to increase its deformation capacity and improve energy absorption. At the same time, a certain movable distance is reserved between the annular stopper (4) and the friction pendulum (7). The end of the annular stopper (4) is treated with a certain inclination angle and rounded end to reduce the damage to the friction pendulum during collision.

6. 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 according to energy consumption requirements; the filling material of the internal cavity of the friction pendulum (7) and the annular stopper (4) is water, particles or viscous liquid.

7. The swing energy dissipation device placed inside a cavity structure according to claim 1, characterized in that: The swing energy dissipation device is integrally fixed on the bottom plate of the L-shaped reserved angle steel (3), and the side plate of the L-shaped reserved angle steel (3) is provided with bolt holes so that the device can be fixed at any position inside the controlled structure by means of bolts (6).

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