Steel damping limiting unidirectional moving pot type rubber support seat

Abstract

The invention discloses a steel damping limiting unidirectional moving pot type rubber support seat. The steel damping limiting unidirectional moving pot type rubber support seat comprises an unidirectional moving pot type rubber support seat, and is structurally characterized in that a top plate extension plate is fixedly connected with two inactive sides of a top plate of the unidirectional moving pot type rubber support seat, an X-shaped steel plate damper is hung on the bottom face of the top plate extension plate, a bottom pot extension plate is fixedly connected with two inactive sides of a bottom pot of the unidirectional moving pot type rubber support seat, two check blocks are welded on the upper surface of the bottom pot extension plate, the X-shaped steel plate damper is located between the two check blocks, and the distance between each check block and the X-shaped steel plate damper is 50-30mm. The steel damping limiting unidirectional moving pot type rubber support seat can achieve the purpose of enabling all piers of a bridge to bear stress together under seismic action, fully develops earthquake resistance of all the piers, dissipates seismic energy, can continue to use production and installation technology of an existing unidirectional moving pot type rubber support seat, and is convenient to use in engineering, and convenient to repair after an 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...

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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

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