Tensile friction pendulum shock insulation support

Abstract

The invention provides a tensile friction pendulum shock insulation support. The tensile friction pendulum shock insulation support comprises a lower base plate, an upper base plate and a sliding body. Wherein the upper seat plate and the lower seat plate are arranged on the two sides of the sliding body in a crossed mode, and the sliding body is arranged between the lower seat plate and the upper seat plate and connected with the lower seat plate and the upper seat plate in a sliding mode. Sliding rails are arranged in the lower seat plate and the upper seat plate, the sliding body achieves displacement in the horizontal direction through the sliding rails when stressed, and meanwhile the lower seat plate and the upper seat plate achieve rotation in the vertical direction through the sliding body. The cross shaft is arranged between the upper sliding body and the lower sliding body, and the lower sliding body is changed into the circular cambered surface, so that the sliding bodies can rotate in any direction, the application situation of a common tensile friction pendulum shock insulation support is expanded, the sliding bodies have the rotating capacity in the vertical direction, and the service life of the sliding bodies is prolonged. And the device can adapt to corners caused by vertical lift-off in a product application structure.

Description

Technical Field

[0001] The invention relates to the technical field of building seismic isolation, in particular to a tensile friction pendulum seismic isolation bearing. Background Art

[0002] The friction pendulum isolation bearing is a kind of isolation bearing that realizes the isolation function by extending the structural vibration period through spherical swing and consuming seismic energy through friction on the sliding interface. The friction pendulum isolation bearing is widely used in bridges, buildings and other related industries due to its high vertical bearing capacity and controllable processing accuracy.

[0003] The structure of the traditional friction pendulum seismic isolation bearing is mainly composed of upper and lower seat plates and a spherical crown body. A sliding friction surface is set between the upper and lower seat plates and the spherical crown body, which can slide in the horizontal direction to achieve the seismic isolation effect. The traditional friction pendulum seismic isolation bearing only has compressive stiffness in the vertical direction, and does not have tensile stiffness.

[0004] In some structures with a large height-width ratio, some of the traditional friction pendulum isolation bearings will be subjected to tension. In order to ensure the safety of the structure, it is necessary to take anti-tension measures for the isolation bearings at the tensioned positions of the structure. Traditional friction pendulum isolation bearings cannot achieve this goal well. Large tension often causes the spherical crown to fall off, and the spherical crown cannot fully contact the upper and lower sliding surfaces. Summary of the invention

[0005] In view of this, the present invention proposes a tensile friction pendulum isolation bearing to solve the problems existing in the above-mentioned prior art, so that it has the ability to slide and rotate in the horizontal direction, the ability to rotate in the vertical direction, and the ability to achieve self-reset after an earthquake.

[0006] To achieve the above-mentioned purpose, the present invention proposes a tensile friction pendulum seismic isolation support, comprising a lower seat plate, an upper seat plate and a sliding body; the upper seat plate and the lower seat plate are cross-arranged on both sides of the sliding body, the sliding body is arranged between the lower seat plate and the upper seat plate, and is slidably connected with the lower seat plate and the upper seat plate; Slide rails are provided inside the lower seat plate and the upper seat plate. When subjected to force, the sliding body realizes horizontal displacement through the slide rails. At the same time, the lower seat plate and the upper seat plate realize vertical rotation through the sliding body.

[0007] Further, the sliding body includes a square steel plate, a circular steel plate, a cross shaft, a plurality of ear plates and a baffle; The square steel plate is arranged on the upper surface of the sliding body, the outer side of the square steel plate is slidably connected to the upper seat plate, and the inner side of the square steel plate is connected to the ear plate; The circular steel plate is arranged on the lower surface of the sliding body, the outer side of the circular steel plate is slidably connected to the lower seat plate, and the inner side of the circular steel plate is connected to the ear plate; The ear plate is fixed on the cross shaft through the baffle plate.

[0008] Furthermore, the upper sliding surface of the square steel plate and the lower sliding surface of the circular steel plate are both arc surfaces, and the curvature radii of the arc surfaces are the same.

[0009] Furthermore, friction plates are provided at the sliding positions of the square slide and the circular slide, and the material of the friction plates includes but is not limited to polytetrafluoroethylene, modified polytetrafluoroethylene, and modified ultra-high molecular weight polyethylene.

[0010] Furthermore, by setting the curvature radii of the upper sliding surface and the lower sliding surface, and the friction coefficient of the friction plate, the seismic isolation effect of the anti-tensile friction pendulum seismic isolation bearing is adjusted.

[0011] Furthermore, an upper sliding surface of the square steel plate in contact with the upper seat plate is plated with chrome, and a lower sliding surface of the circular steel plate in contact with the lower seat plate is plated with chrome.

[0012] Furthermore, the ear plate is connected to the cross shaft by means of a pin shaft, thereby realizing rotation in the vertical direction.

[0013] Furthermore, the lower seat plate includes a sealing plate, an arc-shaped sealing plate and an arc-surface bottom plate, the sealing plate is provided with an arc-shaped slide rail, and the sealing plate, the arc-shaped sealing plate and the arc-surface bottom plate are connected by bolts.

[0014] Furthermore, the upper seat plate includes a sealing plate, a flat sealing plate and a curved bottom plate, the sealing plate is provided with an arc-shaped slide rail, and the sealing plate, the flat sealing plate and the curved bottom plate are connected by bolts.

[0015] Compared with the prior art, the beneficial effect of the present invention is that a cross axis is set in the middle of the upper and lower sliding bodies, and the lower sliding body is changed into a circular arc surface, so that the sliding body can rotate in any direction, expanding the application scenarios of the common tensile friction pendulum isolation bearing, and the sliding body has the ability to rotate in the vertical direction, which can adapt to the rotation angle caused by the vertical lifting of the product in the structure. Since the friction plate is set at the sliding position of the sliding body, its own friction coefficient is reduced, and it has the same curvature radius as the upper and lower seat plates, which improves the self-reset effect of the product after the earthquake and greatly reduces the maintenance cost of the later products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1This is a front view of the overall structure of the tensile friction pendulum isolation support provided by the present invention; Figure 2 A side view of the overall structure of the tensile friction pendulum isolation support provided by the present invention; Figure 3 It is a front view of a sliding body in an embodiment of the present invention; Figure 4 It is a schematic diagram of the explosion structure of the sliding body in an embodiment of the present invention; Figure 5 Schematic diagram of the structure of the lower seat plate in an embodiment of the present invention; Figure 6 Schematic diagram of the upper seat plate structure in an embodiment of the present invention; Among them: 1-upper seat plate, 2-sliding body, 3-lower seat plate, 4-square steel plate, 5-ear plate, 6-cross shaft, 7-baffle, 8-circular steel plate. DETAILED DESCRIPTION

[0017] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] This embodiment proposes a tensile friction pendulum isolation support, such as Figure 1-2 As shown, the tensile friction pendulum isolation support is composed of three parts: a lower seat plate 3, an upper seat plate 1, and a sliding body 2.

[0019] like Figure 3-4 As shown, the sliding body 2 is composed of six parts, namely a cross shaft 6, a set of ear plates 5 (four pieces), a set of baffles 7 (four pieces), a set of friction plates (two pieces), a circular slide plate and a square slide plate.

[0020] The upper sliding surface of the sliding body 2 is a rectangular steel plate 4 with an arc surface, a friction plate is embedded in the upper surface, and the steel surface of the upper surface in contact with the upper seat plate 1 is chrome-plated; the lower sliding surface is a circular steel plate 88 with an arc surface, a friction plate is embedded in the lower surface, and the steel surface of the lower surface in contact with the lower seat plate 3 is chrome-plated. The purpose of chrome plating the upper and lower sliding surfaces is to reduce the friction coefficient of the contact surface. The friction plate is generally made of polytetrafluoroethylene, modified polytetrafluoroethylene and modified ultra-high molecular weight polyethylene. The friction plate is in direct contact with the arc surface of each part and is fixed by countersunk bolts. The curvature radius of the arc surface of each part is equal. The cross shaft 6 of the sliding body 2 is made of high-strength steel, the ear plate 5 is connected to the four shafts of the cross shaft 6, and the ear plate 5 is fixed on the cross shaft 6 by the baffle 7. The ear plate 5 is connected to the upper and lower sliding surfaces by countersunk bolts. The upper sliding surface of the sliding body 2 is installed in the slide rail of the upper seat plate 1, and the lower sliding surface of the sliding body 2 is installed in the slide rail of the lower seat plate 3. The upper and lower seat plates 3 are installed crosswise.

[0021] like Figure 5 As shown, the lower seat plate 3 is composed of five parts, namely two sealing plates with arc-shaped slide rails and two arc-shaped sealing plates, and a bottom plate with an arc surface, and the five parts are connected by bolts.

[0022] like Figure 6 As shown, the upper seat plate 1 is composed of five parts, namely two sealing plates with arc-shaped slide rails, two flat sealing plates, and a bottom plate with an arc surface. The five parts are connected by bolts.

[0023] As a preferred embodiment, the working principle of the tensile friction pendulum isolation bearing provided by the present invention is as follows: the outer surfaces of the square steel plate 4 and the circular steel plate 8 of the sliding body 2 are in contact with the upper seat plate 1 and the lower seat plate 3 respectively during compression, and the inner surfaces of the square steel plate 4 and the circular steel plate 8 of the sliding body 2 are in contact with the upper seat plate 1 and the lower seat plate 3 respectively during tension. During an earthquake, the sliding body 2 can achieve horizontal displacement along the direction of the slide rail. During displacement in other directions, the circular sliding surface below the sliding body 2 can rotate in the slide rail to adapt to the horizontal displacement of the isolation bearing caused by the earthquake force in any direction. The ear plate 5 is connected to the cross shaft 6 by a pin shaft, and has the ability to rotate in the vertical direction, which can adapt to the vertical rotation angle generated by the product during the structural lifting process, and can move in coordination with the ordinary friction pendulum isolation bearing. Because the bearing can achieve rotation and movement in any direction, the isolation bearing can self-reset after the earthquake, greatly reducing the maintenance cost.

[0024] Building structures of different masses and sizes have different requirements for the bearing capacity of seismic isolation bearings. The dimensions of the cross shaft 6, the ear plate 5 and the friction plate can be designed to meet the requirements of structures of different masses and sizes. The seismic isolation effect of the seismic isolation bearing can be adjusted by designing the curvature radius of the arc surface and using friction materials with different friction coefficients.

[0025] Traditional friction pendulum seismic isolation bearings do not have vertical tensile bearing capacity, and common tensile friction pendulum seismic isolation bearings do not have the ability to rotate in any horizontal direction or vertical direction, and it is difficult to achieve a good seismic isolation effect for earthquake waves in any direction. The present invention sets a cross axis 6 between the upper and lower sliding bodies, and changes the lower sliding body 2 into a circular arc surface, thereby realizing the rotation of the sliding body 2 in any direction, expanding the application scenarios of common tensile friction pendulum seismic isolation bearings, and effectively solving the above problems. The sliding body 2 has the ability to rotate in the vertical direction, and can adapt to the product used in the structure. The sliding position of the sliding body 2 is provided with a friction plate, which reduces its own friction coefficient, and it has the same curvature radius as the upper seat plate 1 and the lower seat plate 3, which improves the self-resetting effect of the post-earthquake product, greatly reduces the maintenance cost of the later products, and can flexibly adjust the size of the tensile friction pendulum seismic isolation bearing according to the actual needs of the structure.

[0026] The present invention sets a cross shaft in the middle of the sliding body, and sets an ear plate on each of the four surfaces of the cross shaft. The ear plate is connected to the cross shaft by a pin shaft, and the opposite ear plates are respectively connected to the upper and lower connecting plates by bolts, and the connecting plates are snap-connected to the upper and lower seat plates. The ear plate has the ability to rotate in the vertical direction through the pin shaft connection method. The lower end connecting plate is circular and can rotate inside the lower seat plate, so the sliding body can rotate in any direction, which expands the application scenarios of conventional tensile friction pendulum isolation bearings, so that the product can be applied to the rotation angle caused by local vertical lift-off in the structure, as well as rotation within the structural plane.

[0027] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying 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 a limitation on the present invention.

[0028] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can still modify the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or perform equivalent replacements on some of the technical features thereof; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. They should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A tensile friction pendulum isolation bearing, characterized in that: The sliding body (2) comprises a lower seat plate (3), an upper seat plate (1) and a sliding body (2); the upper seat plate (1) and the lower seat plate (3) are cross-arranged on both sides of the sliding body (2); the sliding body (2) is arranged between the lower seat plate (3) and the upper seat plate (1), and is slidably connected to the lower seat plate (3) and the upper seat plate (1); The lower seat plate (3) and the upper seat plate (1) are both provided with slide rails. When subjected to force, the sliding body (2) achieves horizontal displacement through the slide rails. At the same time, the lower seat plate (3) and the upper seat plate (1) achieve vertical rotation through the slide body (2).

2. The tensile friction pendulum isolation bearing according to claim 1, characterized in that: The sliding body (2) comprises a square steel plate (4), a circular steel plate (8), a cross shaft (6), a plurality of ear plates (5) and a baffle (7); The square steel plate (4) is arranged on the upper surface of the sliding body (2), the outer side of the square steel plate (4) is slidably connected to the upper seat plate (1), and the inner side is connected to the ear plate (5); The circular steel plate (8) is arranged on the lower surface of the sliding body (2), the outer side of the circular steel plate (8) is slidably connected to the lower seat plate (3), and the inner side of the circular steel plate (8) is connected to the ear plate (5); The ear plate (5) is fixed on the cross shaft (6) via the baffle plate (7).

3. The tensile friction pendulum isolation bearing according to claim 2 is characterized in that: The upper sliding surface of the square steel plate (4) and the lower sliding surface of the circular steel plate (8) are both arc surfaces, and the curvature radii of the arc surfaces are the same.

4. The tensile friction pendulum isolation bearing according to claim 2, characterized in that: A friction plate is provided at the sliding position between the square steel plate (4) and the circular steel plate (8), and the material of the friction plate includes but is not limited to polytetrafluoroethylene, modified polytetrafluoroethylene, and modified ultra-high molecular weight polyethylene.

5. The tensile friction pendulum isolation bearing according to claim 3 or 4, characterized in that: The seismic isolation effect of the anti-tensile friction pendulum seismic isolation support is adjusted by setting the curvature radii of the upper sliding surface and the lower sliding surface, as well as the friction coefficient of the friction plate.

6. The tensile friction pendulum isolation bearing according to claim 2, characterized in that: The upper sliding surface of the square steel plate (4) in contact with the upper seat plate (1) is plated with chrome, and the lower sliding surface of the circular steel plate (8) in contact with the lower seat plate (3) is plated with chrome.

7. The tensile friction pendulum isolation bearing according to claim 2 is characterized in that: The ear plate (5) is connected to the cross shaft (6) by means of a pin shaft, thereby achieving rotation in the vertical direction.

8. The tensile friction pendulum isolation bearing according to claim 1, characterized in that: The lower seat plate (3) comprises a sealing plate, an arc-shaped sealing plate and an arc-surface bottom plate, the sealing plate is provided with an arc-shaped slide rail, and the sealing plate, the arc-shaped sealing plate and the arc-surface bottom plate are connected by bolts.

9. The tensile friction pendulum isolation bearing according to claim 1, characterized in that: The upper seat plate (1) comprises a sealing plate, a flat sealing plate and a curved bottom plate, the sealing plate is provided with an arc-shaped slide rail, and the sealing plate, the flat sealing plate and the curved bottom plate are connected by bolts.

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