Self-restoring rolling swinging shake-isolation bridge pier

Abstract

The invention discloses a self-restoring rolling swinging shake-isolation bridge pier, which comprises a pier body, a non-adhesion pre-stressing rib, a damper and a foundation, wherein the pier body is vertically mounted on the foundation, embedded built-in pieces are arranged on the bottom face of the pier body and the top face of the foundation, the non-adhesion pre-stressing rib is arranged in the pier body, one end of the non-adhesion pre-stressing rib is anchored on the top face of the pier body through an anchorage device, and the other end of the non-adhesion pre-stressing rib is anchored at the bottom of the foundation; the damper is arranged between the outer wall of the pier body and the top face of the foundation, one end of the damper is anchored on the outer wall of the pier body, and the other end of the damper is anchored on the top face of the foundation; and the bottom face of the pier body consists of a separation plane in the middle and rolling curved faces on the two sides. According to the self-restoring rolling swinging shake-isolation bridge pier, the bridge pier and the foundation are separated, and earthquake energy is filtered by the rolling and swinging of the bridge pier under a violent earthquake, so that the bridge pier is protected, and the foundation is also protected; and the self-restoring rolling swinging shake-isolation bridge pier is suitable for bridges, sluices and other buildings in a violent earthquake region.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction and isolation of bridges, aqueducts and other structures, and in particular relates to a self-resetting rolling rocking vibration isolation bridge pier. Background technique [0002] Earthquake is a sudden natural phenomenon, which releases a large amount of energy with great destructive power during the earthquake, seriously endangering human production activities and the safety of life and property. The traditional seismic design of bridges mainly adopts two methods: ductility design and seismic isolation design: ductility design is to improve the aseismic performance by increasing the strength and deformation capacity of the pier itself; To prevent the collapse of the structure, but the piers will suffer irreversible damage in a large area under the action of a large earthquake, and it is difficult to repair after the earthquake; the seismic isolation design is to prolong the natura...

AI Technical Summary

Problems solved by technology

However, when the fixed-point swinging pier is adopted, for simply supported girder bridges with high and low piers, the difference in the rotation radius and rotation start angle of the two pier tops will lead to the phenomenon of translational and rotational coupling of the upper girder body; For pier continuous girder bridges, the difference in the rotation radius and rotation start angle of multiple pier tops may cause great changes in the stress on the upper girder body, making it difficult to reset the bridge after an earthquake and even lead to bridge damage

Images