Transverse anti-seismic friction pendulum support

Abstract

The utility model belongs to the technical field of seismic mitigation and isolation supports, and particularly relates to a transverse anti-seismic friction pendulum support. The novel friction pendulum support comprises an upper support plate, a lower support plate, an upper friction pendulum and a lower friction pendulum, the upper friction pendulum and the lower friction pendulum are arranged between the upper support plate and the lower support plate, and longitudinal check blocks are arranged on the two transverse sides of the bottom face of the upper support plate and the two transverse sides of the top face of the lower support plate respectively and used for limiting the transverse movement amplitude of the upper friction pendulum. Transverse check blocks are arranged on the two longitudinal sides of the bottom face of the upper support plate and / or the two longitudinal sides of the top face of the lower support plate respectively, the transverse check blocks are connected with the lower support plate or the upper support plate through a plurality of shear screws, the lower friction pendulum is a hyperboloid spherical crown lining plate, and the upper curved face of the lower friction pendulum and the upper friction pendulum form a first curved face friction pair. The lower curved surface is matched with the lower support plate to form a second curved surface friction pair; the novel friction pendulum support achieves the anti-seismic performance of the longitudinal and transverse anisotropy of a bridge, and has the advantages of being simple and compact in structure, good in anti-seismic performance, safe, economical and durable, and combining anti-seismic performance with seismic mitigation and isolation.

Description

Technical Field

[0001] The utility model belongs to the technical field of seismic isolation bearings, and specifically relates to a transverse seismic friction pendulum bearing, which is particularly suitable for large-span, high-pier bridges or special-shaped bridges. Background Art

[0002] my country is a country prone to frequent earthquake disasters. In recent decades, earthquake disasters have caused devastating disasters in some areas of my country. The seismic resistance of bridge projects has received more and more attention. Currently, the most commonly used seismic resistance method is the use of seismic reduction and isolation technology.

[0003] At present, the seismic isolation design is mainly based on the vibration characteristics of the bridge structure itself, and the same seismic parameters are generally used in the longitudinal and transverse directions. The longitudinal and transverse isotropic seismic parameter design method can meet the seismic requirements of some conventional bridges, but for some special bridges, such as high-pier bridges and special-shaped bridges, there are differences in their longitudinal and transverse vibration characteristics. It is not economical to use isotropic seismic parameter design. At this time, it is necessary to design longitudinal and transverse anisotropic seismic parameters according to the longitudinal and transverse vibration characteristics of the bridge to meet the longitudinal and transverse anisotropic seismic parameter requirements of the bridge. Utility Model Content

[0004] The purpose of the utility model is to provide a new type of friction pendulum bearing with lateral limit seismic resistance and longitudinal seismic reduction and isolation, which has the characteristics of longitudinal and transverse anisotropic seismic resistance of bridges, simple and compact structure, combination of seismic resistance and seismic reduction and isolation, good anti-beam falling performance, safety, economy and durability, and is especially suitable for use in large-span bridges in high-intensity earthquake areas.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A transverse seismic friction pendulum bearing, characterized in that it comprises an upper bearing plate, a lower bearing plate and an upper friction pendulum and a lower friction pendulum placed therebetween, wherein longitudinal stops are respectively arranged on both lateral sides of the bottom surface of the upper bearing plate and on both lateral sides of the top surface of the lower bearing plate, for limiting the lateral movement amplitude of the upper friction pendulum, transverse stops are respectively arranged on both longitudinal sides of the bottom surface of the upper bearing plate and / or on both longitudinal sides of the top surface of the lower bearing plate, the transverse stops are connected to the lower bearing plate or the upper bearing plate by a plurality of shear screws, the lower friction pendulum is a hyperbolic spherical crown lining plate, its upper curved surface forms a first curved friction pair with the upper friction pendulum, and its lower curved surface cooperates with the lower bearing plate to form a second curved friction pair.

[0007] Additional technical features of the above-mentioned transverse anti-seismic friction pendulum bearing include:

[0008] - A plane friction pair is arranged between the upper friction pendulum and the upper support plate, and a longitudinal movement gap is provided between the transverse stoppers on both sides of the upper support plate and the upper friction pendulum;

[0009] ——The bottom surface of the upper friction pendulum is a concave spherical surface, which cooperates with the convex spherical surface of the upper curved surface of the hyperbolic spherical crown lining plate; the lower curved surface of the hyperbolic spherical crown lining plate is also a convex spherical surface, which cooperates with the spherical groove on the top surface of the lower support plate;

[0010] ——Redundant corner space is provided between the transverse edges of the bottom surface of the upper friction pendulum and the longitudinal blocks on the transverse sides of the top surface of the lower support plate, and the gap distance is within the range of 1.5±1mm;

[0011] ——The first curved surface friction pair and the second curved surface friction pair are both composed of stainless steel slide plates and wear-resistant plates, and the wear-resistant plates are polytetrafluoroethylene wear-resistant plates or modified ultra-high molecular weight polyethylene wear-resistant plates.

[0012] Compared with the prior art, the utility model provides a transverse seismic-resistant friction pendulum bearing, which has the following advantages: longitudinal blocks are respectively arranged on the transverse sides of the bottom surface of the upper bearing plate and the transverse sides of the top surface of the lower bearing plate of the friction pendulum bearing, which are used to limit the transverse movement amplitude of the upper friction pendulum; transverse blocks are respectively arranged on the longitudinal sides of the bottom surface of the upper bearing plate and / or the longitudinal sides of the top surface of the lower bearing plate; the transverse blocks are connected to the lower bearing plate or the upper bearing plate by a plurality of shear screws, thereby realizing the transverse upper limit seismic resistance of the bridge to prevent the bridge from overturning or falling off; in the longitudinal direction of the bridge, the screws of the limit blocks are broken by the shear force, and can move to a large extent in the direction of the bridge, thereby improving the seismic isolation performance; the friction pendulum bearing has longitudinal and transverse anisotropic seismic parameters of the bridge, combines transverse seismic resistance with longitudinal seismic isolation, has good anti-beam falling performance, is safe and durable, and is particularly suitable for use in high-intensity earthquake areas of large-span bridges. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional cross-sectional view of a transverse anti-seismic friction pendulum support of the utility model;

[0014] Figure 2 It is a schematic diagram of the transverse cross-sectional structure of the device. DETAILED DESCRIPTION

[0015] The structure and working principle of the transverse anti-seismic friction pendulum support provided by the utility model are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. 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.

[0016] In the description of the present invention, unless otherwise specified, the terms "horizontal", "longitudinal", "upper", "lower", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0017] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set / provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0018] like Figure 1 As shown, the structure of the transverse anti-seismic friction pendulum bearing comprises an upper bearing plate 1, a lower bearing plate 2, and an upper friction pendulum 3 and a lower friction pendulum 4 arranged therebetween, wherein longitudinal stops (11, 21) are respectively arranged on both lateral sides of the bottom surface of the upper bearing plate 1 and on both lateral sides of the top surface of the lower bearing plate 2, for limiting the lateral movement amplitude of the upper friction pendulum 3, transverse stops (31, 41) are respectively arranged on both longitudinal sides of the bottom surface of the upper bearing plate 1 and / or on both longitudinal sides of the top surface of the lower bearing plate 2, the transverse stops (31, 41) are connected to the lower bearing plate 2 or the upper bearing plate 1 through a plurality of shear screws 5, and the lower friction pendulum 4 is a hyperbolic spherical crown lining plate, whose upper curved surface forms a first curved surface friction pair 61 with the upper friction pendulum 3, and whose lower curved surface cooperates with the lower bearing plate 2 to form a second curved surface friction pair 62.

[0019] The working principle is as follows: a composite seismic isolation structure consisting of an upper friction pendulum 3 and a lower friction pendulum 4 is arranged between the upper bearing plate 1 and the lower bearing plate 2 of the bearing, and the upper and lower edges of the upper friction pendulum 3 are respectively restricted by the longitudinal blocks (11, 21) of the upper and lower bearing plates, so that the bridge has a good stable seismic resistance effect in the transverse direction, and in the longitudinal direction of the bridge (along the bridge direction), the upper and lower edges of the upper friction pendulum 3 are respectively restricted by the transverse blocks (31, 41) of the upper and lower bearing plates, and the transverse blocks (31, 41) are connected by a shear screw 5. When the shear screw 5 is broken by an earthquake impact, the longitudinal movement of the upper friction pendulum 3 is not restricted, the vibration absorption capacity is fully absorbed, and the seismic isolation buffering effect is good.

[0020] Furthermore, the hyperbolic structure of the lower friction pendulum 4 forms a first curved friction pair 61 and a second curved friction pair 62 with the upper friction pendulum 3 and the lower support plate 2 respectively. The composite seismic isolation friction pendulum has a better application effect, and the longitudinal and transverse anisotropic seismic isolation parameter design is particularly suitable for use in large-span bridges, high-pier bridges or special-shaped bridges.

[0021] In the structure constituting the above-mentioned transverse anti-seismic friction pendulum support,

[0022] In one embodiment, a plane friction pair 7 is arranged between the upper friction pendulum 3 and the upper support plate 1, and the transverse blocks on both sides of the upper support plate 1 have a longitudinal movement gap a with the upper friction pendulum 3, that is, the friction coefficient of the plane friction pair 7 is small, and there is a movement gap in the longitudinal direction, so the upper support plate 1 and the upper friction pendulum 3 move relative to each other, realizing the displacement function caused by temperature, live load, etc., and meeting the normal functional requirements of the bridge;

[0023] ——Preferably, the bottom surface of the upper friction pendulum 3 is a concave spherical surface, which cooperates with the convex spherical surface of the upper curved surface of the hyperbolic spherical crown lining plate; the lower curved surface of the hyperbolic spherical crown lining plate is also a convex spherical surface, which cooperates with the spherical groove on the top surface of the lower support plate 2. The hyperbolic friction pendulum is designed so that the relative rotation between the spherical surfaces realizes the support angle function, and the upper and lower hyperbolic spherical crown lining plates are convex curved surfaces, which are more stable when assembled with the upper and lower support structures, and the movement safety is higher;

[0024] ——Furthermore, a corner redundant space b is provided between the transverse side edges of the bottom surface of the upper friction pendulum 3 and the longitudinal blocks on the transverse sides of the top surface of the lower support plate 2, and the gap distance is within the range of 1.5±1mm, which meets the corner requirement of the support body within the range of 0.01-0.03 arc, and is particularly suitable for large-span bridge structures. The lower edge of the upper support plate 1 and the upper edge of the lower support plate 2 also maintain a certain distance, which is used to realize the tilting swing between the upper support plate 1 and the lower support plate 2, and the size of the distance is determined according to the support size and the actual specifications of the bridge;

[0025] ——The above-mentioned first curved surface friction pair 61 and second curved surface friction pair 62 are both composed of stainless steel slide plates and wear-resistant plates. The wear-resistant plates are preferably polytetrafluoroethylene wear-resistant plates or modified ultra-high molecular weight polyethylene wear-resistant plates, which have excellent sliding and wear-resistant properties, long service life, safety, stability, economy and durability.

[0026] The above-described implementation modes are only used to illustrate the technical solution of the utility model, and are not limiting conditions for the implementation of the utility model. Therefore, any other modifications or equivalent replacements of configuration dimensions and internal structures made to the technical solution of the utility model, as long as they do not depart from the spirit and scope of the technical solution of the utility model, should be included in the scope of the claims of the utility model.

Claims

1. A transverse anti-seismic friction pendulum bearing, characterized in that: It includes an upper support plate, a lower support plate, and an upper friction pendulum and a lower friction pendulum placed therebetween, wherein longitudinal stops are respectively arranged on both lateral sides of the bottom surface of the upper support plate and on both lateral sides of the top surface of the lower support plate, for limiting the lateral movement amplitude of the upper friction pendulum, transverse stops are respectively arranged on both longitudinal sides of the bottom surface of the upper support plate and / or on both longitudinal sides of the top surface of the lower support plate, the transverse stops are connected to the lower support plate or the upper support plate through a plurality of shear screws, the lower friction pendulum is a hyperbolic spherical crown lining plate, its upper curved surface forms a first curved friction pair with the upper friction pendulum, and its lower curved surface cooperates with the lower support plate to form a second curved friction pair.

2. A transverse anti-seismic friction pendulum bearing according to claim 1, characterized in that: A plane friction pair is arranged between the upper friction pendulum and the upper support plate, and a longitudinal movement gap is provided between the transverse stoppers on both longitudinal sides of the upper support plate and the upper friction pendulum.

3. The lateral anti-seismic friction pendulum bearing according to claim 1, characterized in that: The bottom surface of the upper friction pendulum is a concave spherical surface, which cooperates with the convex spherical surface of the upper curved surface of the hyperbolic spherical crown lining plate; the lower curved surface of the hyperbolic spherical crown lining plate is also a convex spherical surface, which cooperates with the spherical groove on the top surface of the lower support plate.

4. The lateral anti-seismic friction pendulum bearing according to claim 3, characterized in that: A corner redundant space is provided between the transverse side edges of the bottom surface of the upper friction pendulum and the transverse side longitudinal stoppers of the top surface of the lower support plate, and the gap distance is within the range of 1.5±1mm.

5. The lateral anti-seismic friction pendulum bearing according to claim 1, characterized in that: The first curved surface friction pair and the second curved surface friction pair are both composed of a stainless steel slide plate and a wear-resistant plate, and the wear-resistant plate is a polytetrafluoroethylene wear-resistant plate or a modified ultra-high molecular weight polyethylene wear-resistant plate.

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