Shear-force-controllable shock isolation support

Abstract

The invention discloses a shear-force-controllable shock isolation support. The shear-force-controllable shock isolation support comprises an upper connection plate, a lower connection plate, shear keys, a horizontal slide layer and a support body; the lower connection plate is arranged under the support body and connected with a pier; the horizontal slide layer capable of sliding freely in various directions is arranged on the support body, and the upper connection plate is arranged on the horizontal slide layer and connected with a girder; the shear keys are arranged on the two sides of thesupport body, the top ends of the shear keys stretch into the upper connection plate and are clamped in the transverse direction of a bridge, a certain slide space is formed in the longitudinal direction of the bridge, and the bottoms of the shear keys stretch into the lower connection plate and are fixed to the lower connection plate. In normal operation of the shear-force-controllable shock isolation support, the stiffness requirement of the bridge is met through the shear keys, the shear keys are sheared when a strong earthquake happens, the support body slides freely along a horizontal slide surface, and the shock insulation effect is well achieved at preassigned positions.

Description

Technical field [0001] The invention belongs to the technical field of bridge seismic isolation, and particularly relates to a shear-controllable seismic isolation support, which is used for lateral seismic isolation of bridges. When used for longitudinal bridge seismic isolation, it needs to be combined with a longitudinal bridge direction limiting device Get up and use. Background technique [0002] After entering the 21st century, earthquakes have occurred frequently all over the world. After each major earthquake, the bridge as a lifeline project will cause various earthquake damages, which will bring great difficulties to post-earthquake rescue and disaster relief, and may cause even greater secondary occurrences. disaster. [0003] At present, for small and medium-span bridges, the most widely used types of bearings are plate rubber bearings, basin bearings and steel bearings. Bearings are weak parts of the bridge that resist earthquakes and are prone to damage during earthq...

AI Technical Summary

Problems solved by technology

But in fact, the failure surface of the support may be uneven, and there may be uncertain damage states such as compression and occlusion, and the shear force transmitted by the support cannot be accurately grasped. There are uncertainties in the design of anti-fall beam devices, piers, piles, etc., and it is difficult to achieve accurate design

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