Three-dimensional shock insulation friction pendulum support

Abstract

A three-dimensional shock insulation friction pendulum support comprises an upper seat plate, a lower seat plate and a vertical shock insulation component, the lower seat plate is arranged below the upper seat plate at intervals, a containing cavity is formed by the lower seat plate and the upper seat plate, and the vertical shock insulation component is arranged in the containing cavity; the upper seat plate is provided with a first concave-convex face, the lower seat plate is provided with a second concave-convex face, and the vertical shock insulation component is provided with a third concave-convex face matched with the first concave-convex face and a fourth concave-convex face matched with the second concave-convex face. The upper base plate is stressed, and the vertical shock insulation component rotates relative to the upper base plate and the lower base plate through the interaction of the first concave-convex face and the third concave-convex face and the interaction of the second concave-convex face and the fourth concave-convex face. According to the three-dimensional shock isolation friction pendulum support, through the vertical shock isolation component, it is guaranteed that the friction surfaces of the friction pendulum support can be kept in contact under the effect of overturning moment, horizontal vibration of the bottom can be effectively isolated, the three-dimensional shock isolation friction pendulum support always keeps translational motion in the dislocation process under an earthquake, the vertical limiting and vertical shock isolation capacity is achieved, and the service life of the three-dimensional shock isolation friction pendulum support is prolonged. And the influence of the vertical earthquake action on the structure can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of building seismic isolation supports, in particular to a three-dimensional seismic isolation friction pendulum support. Background Art

[0002] In the vertical seismic isolation design of building structures, there has always been a contradiction between stable vertical bearing capacity and good seismic isolation effect. Most of the existing vertical seismic isolation supports cannot achieve an effective vertical seismic isolation period and a good seismic isolation effect, or due to the large vertical static load, they cannot meet the requirements of static and displacement under earthquake action.

[0003] The friction pendulum horizontal isolation bearing has a very stable hysteresis performance. A properly designed friction pendulum isolation bearing can resist large earthquakes. However, the friction pendulum isolation bearing also has disadvantages such as tensile failure. When the vertical action of the earthquake is large, the slider will separate from the upper and lower plates, and the horizontal isolation effect cannot be achieved. It is also easy to cause damage to the friction pendulum bearing. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a three-dimensional seismic isolation friction pendulum bearing. By adding a vertical seismic isolation component on the basis of the friction pendulum bearing, the vertical seismic isolation capacity of the bearing is enhanced, so that the bearing can effectively isolate horizontal and vertical earthquake effects.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is to provide a three-dimensional seismic isolation friction pendulum bearing for seismic isolation of building structures, and the three-dimensional seismic isolation friction pendulum bearing comprises:

[0006] An upper seat plate having a first concave-convex surface;

[0007] A lower seat plate is spaced below the upper seat plate and forms a receiving cavity therewith, wherein the lower seat plate has a second concave-convex surface;

[0008] A vertical seismic isolation component is disposed in the accommodating cavity, wherein the vertical seismic isolation component has a third concave-convex surface matching the first concave-convex surface and a fourth concave-convex surface matching the second concave-convex surface;

[0009] The upper seat plate is stressed and the vertical seismic isolation member is rotated relative to the upper seat plate and the lower seat plate through the interaction between the first concave-convex surface and the third concave-convex surface, and the second concave-convex surface and the fourth concave-convex surface.

[0010] Furthermore, a first friction layer is provided at the bottom of the upper seat plate, and the first friction layer is recessed upward to form the first concave-convex surface; a second friction layer is provided at the top of the lower seat plate, and the second friction layer is recessed downward to form the second concave-convex surface.

[0011] Furthermore, the first friction layer and the upper seat plate are an integral structure or a split structure; the second friction layer and the lower seat plate are an integral structure or a split structure.

[0012] Furthermore, the first friction layer and the second friction layer are made of a low friction coefficient and wear-resistant material, and the surfaces of the first concave-convex surface and the second concave-convex surface are sprayed or brushed with polytetrafluoroethylene.

[0013] Furthermore, the upper seat plate has a first limit block extending downward from the bottom edge of the first friction layer, and the lower seat plate has a second limit block extending downward from the bottom edge of the second friction layer.

[0014] Furthermore, the distance between the first limiting block and the second limiting block is smaller than the height of the vertical seismic isolation component.

[0015] Furthermore, the first concave-convex surface is a spherical surface, and the third concave-convex surface is a corresponding spherical surface; the second concave-convex surface is a spherical surface, and the fourth concave-convex surface is a corresponding spherical surface.

[0016] Furthermore, the spherical curvature radius of the first concave-convex surface is the same as the spherical curvature radius of the second concave-convex surface; the spherical curvature radius of the third concave-convex surface is the same as the spherical curvature radius of the fourth concave-convex surface.

[0017] Furthermore, the surfaces of the third concave-convex surface and the fourth concave-convex surface are both sprayed or brushed with polytetrafluoroethylene.

[0018] Furthermore, the vertical seismic isolation component includes an upper slider, a lower slider, a force transmission member, a guide rod and a spring group sleeved on the guide rod, the upper end surface of the upper slider is the third concave-convex surface, the lower end surface of the lower slider is the fourth concave-convex surface, the lower end of the guide rod is connected to the upper end surface of the lower slider, the upper end of the force transmission member is connected to the lower end surface of the upper slider, the lower end of the force transmission member is sleeved on the guide rod and its lower end surface is against the upper end surface of the spring group.

[0019] In the present application, a vertical seismic isolation component is added on the basis of the friction pendulum bearing. The upper and lower end faces of the vertical seismic isolation component are respectively in contact and rotate with the upper seat plate and the lower seat plate. The vertical seismic isolation component ensures that the friction pendulum bearing can maintain contact between the friction surfaces under the overturning moment, which can effectively isolate the horizontal vibration of the bottom, and always maintains translational motion during the dislocation of the three-dimensional seismic isolation friction pendulum bearing under an earthquake. The vertical seismic isolation component has pre-compression deformation, and the upward lifting of the structure will be offset by the rebound of the vertical seismic isolation component, which solves the problem that the horizontal stiffness disappears and the slider is easy to detach when the friction pendulum is lifted off. The present application has vertical limiting and vertical seismic isolation capabilities, which can effectively reduce the impact of vertical earthquake action on the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a vertical cross-sectional schematic diagram of the three-dimensional seismic isolation friction pendulum support of the utility model.

[0021] Figure 2 yes Figure 1 Bottom view of the upper middle slider.

[0022] Figure 3 yes Figure 1 Top view of the lower middle slider.

[0023] Explanation of the accompanying drawings: upper seat plate 1, first concave-convex surface 10, first friction layer 11, first limit block 12, lower seat plate 2, second concave-convex surface 20, second friction layer 21, second limit block 22, vertical seismic isolation member 3, third concave-convex surface 30, fourth concave-convex surface 31, upper slider 32, lower slider 33, force transmission member 34, guide rod 35, spring group 36, stiffening rib 37, polytetrafluoroethylene plate 38, connecting member 4. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See also Figure 1As shown, the utility model relates to a three-dimensional seismic isolation friction pendulum bearing for seismic isolation of building structures. The three-dimensional seismic isolation friction pendulum bearing comprises an upper seat plate 1, a lower seat plate 2 and a vertical seismic isolation member 3. The lower seat plate 2 is arranged below the upper seat plate 1 and forms a receiving cavity therewith, and the vertical seismic isolation member 3 is arranged in the receiving cavity. The upper seat plate 1 has a first concave-convex surface 10, the lower seat plate 2 has a second concave-convex surface 20, and the vertical seismic isolation member 3 has a third concave-convex surface 30 matched with the first concave-convex surface 10 and a fourth concave-convex surface 31 matched with the second concave-convex surface 20. The upper seat plate 1 is subjected to force and the vertical seismic isolation member 3 rotates relative to the upper seat plate 1 and the lower seat plate 2 through the interaction between the first concave-convex surface 10 and the third concave-convex surface 30, the second concave-convex surface 20 and the fourth concave-convex surface 31.

[0028] The bottom of the upper seat plate 1 is provided with a first friction layer 11, which is concave upward to form a first concave-convex surface 10; the top of the lower seat plate 2 is provided with a second friction layer 21, which is concave downward to form a second concave-convex surface 20. Among them, the first concave-convex surface 10, the second concave-convex surface 20, the third concave-convex surface 30 and the fourth concave-convex surface 31 are all smooth spherical surfaces, and the spherical curvature radius of the first concave-convex surface 10 is the same as the spherical curvature radius of the second concave-convex surface 20; the spherical curvature radius of the third concave-convex surface 30 is the same as the spherical curvature radius of the fourth concave-convex surface 31.

[0029] The first friction layer 11 and the second friction layer 21 are made of a low friction coefficient and wear-resistant material. The surfaces of the first concave-convex surface 10 and the second concave-convex surface 20 are sprayed or brushed with polytetrafluoroethylene. The surfaces of the third concave-convex surface 30 and the fourth concave-convex surface 31 are sprayed or brushed with polytetrafluoroethylene to reduce the resistance of the vertical seismic isolation component 3 during rotation.

[0030] The parameters of the arc spherical surfaces of the first concave-convex surface 10, the second concave-convex surface 20, the third concave-convex surface 30 and the fourth concave-convex surface 31 can be designed to adjust the stiffness and structural natural frequency of the three-dimensional seismic isolation friction pendulum bearing, making them much smaller than the natural frequency of the traditional structure; since the concave-convex surface has a very small friction coefficient, it can effectively isolate the horizontal vibration of the bottom, and the upper part always keeps the translational motion during the displacement of the three-dimensional seismic isolation friction pendulum bearing under an earthquake. When the traditional friction pendulum is lifted off, the horizontal stiffness disappears and the slider is easy to detach, resulting in the limitation of the application scope of the traditional friction pendulum. The friction pendulum is connected in series with the vertical seismic isolation component 3. The vertical seismic isolation component 3 has pre-compression deformation under its own weight. The upward lifting of the structure will be offset by the rebound of the vertical seismic isolation component 3, solving the problem that the horizontal stiffness disappears and the slider is easy to detach when the friction pendulum is lifted off.

[0031] In this embodiment, the first friction layer 11 and the upper seat plate 1 are split structures, and the second friction layer 21 and the lower seat plate 2 are also split structures. Of course, the first friction layer 11 and the upper seat plate 1 can also be an integrated structure, and the second friction layer 21 and the lower seat plate 2 can be an integrated structure.

[0032] The upper seat plate 1 has a first limit block 12 extending downward from the bottom edge of the first friction layer 11, and the lower seat plate 2 has a second limit block 22 extending downward from the bottom edge of the second friction layer 21. The distance between the first limit block 12 and the second limit block 22 is smaller than the height of the vertical seismic isolation component 3, thereby preventing the vertical seismic isolation component 3 from generating excessive displacement during horizontal rotation, thereby causing failure, and limiting the vertical seismic isolation component 3 to always be in the accommodating cavity.

[0033] A connecting piece 4 is also provided at the top of the upper seat plate 1 and the bottom of the lower seat plate 2, so that the three-dimensional seismic isolation friction pendulum bearing can be fixed between the building structure and the ground.

[0034] Combination Figure 2 and Figure 3 As shown, the vertical seismic isolation member 3 includes an upper slider 32, a lower slider 33, a force transmission member 34, a guide rod 35 and a spring group 36 sleeved on the guide rod 35. The upper end face of the upper slider 32 is a third concave-convex surface 30, and the lower end face of the upper slider 32 is a plane. The force transmission member 34 is a hollow thick-walled steel pipe, and its upper end is welded to the lower end face of the upper slider 32. Stiffening ribs 37 are welded to the periphery of the force transmission member 34, and the stiffening ribs 37 are welded to the upper slider 32 at the same time to enhance the stability of the force transmission member 34. The upper end face of the lower slider 33 is a plane, and the lower end face of the lower slider 33 is a fourth concave-convex surface 31. The guide rod 35 is a hollow thick-walled steel pipe, and its lower end face is welded to the upper end face of the lower slider 33. The spring group 36 is sleeved on the guide rod 35 and placed on the upper end surface of the lower slider 33. The lower end of the force transmission member 34 is sleeved on the guide rod 35 and its lower end surface abuts against the upper end surface of the spring group 36. The outer surface of the guide rod 35 is covered with a polytetrafluoroethylene plate 38 to reduce the friction between the spring group 36 and the guide rod 35.

[0035] In this embodiment, there are four guide rods 35, force transmission members 34 and spring groups 36, which are arranged in a central symmetric manner. The spring group 36 is preferably a butterfly spring group 36, which can be replaced by a spiral spring or other types of springs under the condition of satisfying the vertical bearing capacity.

[0036] The vertical seismic isolation component 3 is designed based on vertically stacked butterfly springs and sleeves to solve the system's requirements for allowable vertical deformation; the guide rod 35 can effectively constrain the horizontal deformation of the butterfly spring group 36 but allow axial deformation, so that the horizontal deformation and axial deformation of the device are respectively concentrated in different areas; the vertical stiffness and frequency of the vertical seismic isolation component 3 can be adjusted by designing the relevant parameters of the butterfly spring group 36 to achieve a good vertical seismic isolation effect; the design of the butterfly spring group 36 can prevent the spring from being subjected to horizontal vibration transmitted from the bottom to the top, and concentrate the vertical deformation on the butterfly spring group 36; the vertical spring ensures that the friction pendulum bearing can maintain contact between the friction surfaces under the action of the overturning moment.

[0037] In addition, a vertical or horizontal viscous damper may be provided between the upper slider 32 and the lower slider 33 to reduce the earthquake effect by circulating energy.

[0038] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A three-dimensional seismic isolation friction pendulum bearing, used for seismic isolation of building structures, characterized in that: The three-dimensional seismic isolation friction pendulum support comprises: An upper seat plate having a first concave-convex surface; A lower seat plate is spaced below the upper seat plate and forms a receiving cavity therewith, wherein the lower seat plate has a second concave-convex surface; A vertical seismic isolation component is disposed in the accommodating cavity, wherein the vertical seismic isolation component has a third concave-convex surface matching the first concave-convex surface and a fourth concave-convex surface matching the second concave-convex surface; The upper seat plate is stressed and the vertical seismic isolation member is rotated relative to the upper seat plate and the lower seat plate through the interaction between the first concave-convex surface and the third concave-convex surface, and the second concave-convex surface and the fourth concave-convex surface.

2. The three-dimensional seismic isolation friction pendulum bearing according to claim 1, characterized in that: A first friction layer is disposed at the bottom of the upper seat plate, and the first friction layer is recessed upward to form the first concave-convex surface; a second friction layer is disposed at the top of the lower seat plate, and the second friction layer is recessed downward to form the second concave-convex surface.

3. The three-dimensional seismic isolation friction pendulum bearing according to claim 2, characterized in that: The first friction layer and the upper seat plate are an integral structure or a split structure; the second friction layer and the lower seat plate are an integral structure or a split structure.

4. The three-dimensional seismic isolation friction pendulum bearing according to claim 3, characterized in that: The first friction layer and the second friction layer are made of a wear-resistant material with a low friction coefficient, and the surfaces of the first concave-convex surface and the second concave-convex surface are both sprayed or brushed with polytetrafluoroethylene.

5. The three-dimensional seismic isolation friction pendulum bearing according to claim 3, characterized in that: The upper seat plate has a first limit block extending downward from the bottom edge of the first friction layer, and the lower seat plate has a second limit block extending downward from the bottom edge of the second friction layer.

6. The three-dimensional seismic isolation friction pendulum bearing according to claim 5, characterized in that: The distance between the first limiting block and the second limiting block is smaller than the height of the vertical seismic isolation component.

7. The three-dimensional seismic isolation friction pendulum bearing according to claim 1, characterized in that: The first concave-convex surface is a spherical surface, and the third concave-convex surface is a corresponding spherical surface; the second concave-convex surface is a spherical surface, and the fourth concave-convex surface is a corresponding spherical surface.

8. The three-dimensional seismic isolation friction pendulum bearing according to claim 7, characterized in that: The spherical curvature radius of the first concavo-convex surface is the same as the spherical curvature radius of the second concavo-convex surface; the spherical curvature radius of the third concavo-convex surface is the same as the spherical curvature radius of the fourth concavo-convex surface.

9. The three-dimensional seismic isolation friction pendulum bearing according to claim 7, characterized in that: The surfaces of the third concave-convex surface and the fourth concave-convex surface are both sprayed or brushed with polytetrafluoroethylene.

10. The three-dimensional seismic isolation friction pendulum bearing according to any one of claims 1 to 9, characterized in that: The vertical seismic isolation component includes an upper slider, a lower slider, a force transmission member, a guide rod and a spring group sleeved on the guide rod, the upper end surface of the upper slider is the third concave-convex surface, the lower end surface of the lower slider is the fourth concave-convex surface, the lower end of the guide rod is connected to the upper end surface of the lower slider, the upper end of the force transmission member is connected to the lower end surface of the upper slider, the lower end of the force transmission member is sleeved on the guide rod and its lower end surface is against the upper end surface of the spring group.

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