An anti-slip plate bearing

Abstract

The invention discloses an anti-sliding plate type support. The anti-sliding plate type support is characterized in that an upper support steel plate and a lower support steel plate are each provided with tightly-bracing plates and annular steel plates; the tightly-bracing plates are fixedly arranged at the two sides of the upper support steel plate and the two sides of the lower support steel plate through bolts; the annular steel plates are mounted outside the upper support steel plate and the lower support steel plate in a sleeving manner and fixed to the upper tightly-bracing plates and the lower tightly-bracing plates through tightly-bracing bolts; flexible prestress ribs are arranged between the upper support steel plate and the upper tightly-bracing plates as well as between the lower support steel plate and the lower tightly-bracing plates; and by means of the flexible prestress ribs, the upper support steel plate and the lower support steel plate are connected into a whole through upper bolts and lower bolts, so that anti-sliding prepressing of the plate type support is achieved. Compared with the prior art, the anti-sliding plate type support can improve anti-sliding performance without producing over-constraining influence on horizontal dislocation of a beam body and the support; and the anti-sliding plate type support is provided with a self-balanced flexible prestree rib anchoring system and is simple in structure, convenient to mount and replace and low in manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of bridge bearings, in particular to an anti-slip plate bearing which can adapt to the sliding resistance of medium and small-span bridges. Background technique [0002] Ordinary plate rubber bearings are widely used in bridge engineering, especially small and medium-span bridge engineering, due to their low overall cost and cheap construction methods. The two important indicators for the selection of ordinary plate rubber bearings are the maximum vertical bearing pressure and the minimum anti-slip bearing pressure. For bridges where the effect accounts for a large proportion of the standard combined load effect, when the maximum vertical bearing pressure of the bearing meets the requirements, the minimum anti-slip bearing pressure or the horizontal deformation of the bearing associated with it usually cannot meet the selection requirements of the bearing. In order to solve such problems, products generally...

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Problems solved by technology

[0004] The object of the present invention is an anti-slip plate bearing designed for the deficiencies of the prior art, using flexible prestressed tendons to connect the upper and lower steel plates of the support into a whole, and forming self-balancing through the ring steel plate and the jacking bolts The flexible prestressed tendon anchoring system uses the friction between the support plate, the top clamping plate and the flexible prestressed tendon to form the anchoring force. The loss of prestress in order to realize the preloading of the plate rubber bearing, the use of flexible prestressed tendons should have the characteristics of high strength and low creep, and at the same time, its shear stiffness in the direction of the bridge should be much smaller than that of the plate rubber bearing. Meet the telescopic and deformation requirements of the beam body during normal use, increase the maximum frictional force of relative sliding between the support and the beam body, and ensure the anti-slip performance of the support under horizontal earthquakes without over-constraining the horizontal displacement of the support impact, the structure is simple, and the installation is convenient, which better solves the problem that while enhancing the anti-slip performance of the support, it also limits the reasonable deformation of the support in the normal use stage and easily produces over-constraint on the beam body, which greatly improves the bearing performance. The overall anti-slip performance also satisfies the anti-slip performance of the bearing under horizontal earthquake

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