Bidirectional-limiting unidirectional-movement basin-type rubber support

Abstract

The invention discloses a bidirectional-limiting unidirectional-movement basin-type rubber support, comprising a unidirectional-movement basin-type rubber support; the bidirectional-limiting unidirectional-movement basin-type rubber support is characterized in that cylindrical baffle plates are fixed on side faces of the two non-movable sides of a top plate of the unidirectional-movement basin-type rubber support in a welding manner; each of the two non-movable sides of a bottom basin of the unidirectional-movement basin-type rubber support is fixedly connected with a bottom basin extension plate; a door-shaped limiting frame is fixed on the upper surface of each of the bottom basin extension plates in a threaded manner; the cylindrical baffle plates are located in the door-shaped limiting frames; the upper edges of the cylindrical baffle plates contact beams of the door-shaped limiting frames; distances between the cylindrical baffle plates and two upright posts of the door-shaped limiting frames all are 50 to 300mm. The support, under the earthquake action, has the effect of restricting an over-displacement of the top plate at a movement direction and a vertical-up displacement of the top plate; the support can realize that each pier of a bridge is stressed jointly and the earthquake resistance performance of each pier can be brought into full play; meanwhile, the support follows the production technology and the installation technology of the current support so that the support can be repaired conveniently after engineering application and earthquake.

Description

technical field [0001] The invention relates to a one-way movable basin-type rubber bearing for a bridge, which belongs to the field of civil construction. Background technique [0002] Bearings are functional components that connect bridge girders and piers. The main girder of the bridge will stretch and rotate during work due to temperature and other reasons. The bridge support can eliminate the restrictions on the above deformation of the main girder by the bridge piers through proper structure, so that the main girder can expand and rotate freely. [0003] Bridge supports can be divided into three categories according to their motion characteristics. One is fixed supports, which can only meet the needs of the main girder rotation of the bridge, and cannot slide in the length and width directions of the main girder; the other is one-way movable supports. In addition to the rotation function, this type of support can also limit the displacement of the main beam of the bri...

AI Technical Summary

Problems solved by technology

[0006] Under the action of earthquake load, the existing one-way movable basin bearing can only transmit a small horizontal seismic force (3%-6%) through the friction between the PTFE plate and the stainless steel plate, see the traffic industry standard of the People's Republic of China, " Basin Rubber Bearings for Highway Bridges" (JT / T391-2009)), there is no special device to restrict the displacement in the active direction, and it is prone to unrecoverable excessive displacement during earthquakes, and there is no seismic energy dissipation function. The level of the main girder of the bridge Most of the earthquake action is transmitted to the bridge piers by the fixed bearings, so that the earthquake internal force of the bridge piers with fixed bearings is much larger than that of other bridge piers, and the damage is also more serious than other bridge piers (see Wenchuan Earthquake Highway Earthquake Damage Investigation - Bridges, People's Transportation Publishing House, 2012.3, ISBN 978-7-114-09590-0), can not give full play to the seismic capacity of each pier in the bridge

[0007] Moreover, the existing pot-type rubber bearings can only bear vertical pressure and cannot bear vertical tension. Under excessive vertical earthquake action, the top plate and the PTFE plate may be separated, causing the bearing to be voided and damaged (see Wenchuan Earthquake Damage Investigation of Highway——Bridge, People's Communications Press, 2012.3, ISBN 978-7-114-09590-0)

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