Resettable roll-in type swinging seismic-isolation pier stud with flanges

Abstract

Disclosed is a resettable roll-in type swinging seismic-isolation pier stud with flanges. The resettable roll-in swinging seismic-isolation pier stud is of a resettable seismic-isolation structure. The seismic-isolation pier stud comprises a main beam, piers, bearing platforms, semi-protruding spherical pier bottoms, pier flanges, rubber spacers, hollowed semispherical bearing platform tops, shape memory alloy shear bolts and oblique-section stoppers. The fixed connection of the piers and the bearing platforms is changed into swingable hinge connection. The spherical pier bottoms of the piers are embedded in the hollowed hemispheres of the bearing platform tops. The pier flanges are arranged on two sides of the upper portions of the spherical pier bottoms and are in anchorage connection with the bearing platforms via the shape memory alloy shear bolts. The rubber spacers are arranged between the semi-protruding spherical pier bottoms and the hollowed semispherical tops and between the bearing platforms and the pier flanges as well as between the sides of the pier flanges and the bearing platform stoppers. The pier stud is separated from the foundation, and seismic energy can be filtered by swinging, so that the piers and the foundation are protected. The resettable roll-in type swinging seismic-isolation pier stud has excellent social and economic benefits and worthy of popularization and application.

Description

technical field [0001] The invention relates to the field of seismic isolation technology of bridge engineering and river crossing engineering, in particular to a self-resetting swinging seismic isolation pier. Background technique [0002] Most areas in my country are located in earthquake-prone areas, especially in North China and Southwest China, which are still strong earthquake areas. When constructing structures in these areas, it is necessary to consider the anti-seismic performance of structures and adopt reasonable structural forms to reduce the damage caused by earthquakes. The recent major earthquakes at home and abroad have shown the serious consequences of bridge engineering damage. Effective anti-seismic measures must be taken to reduce the damage of bridges and keep the traffic lifeline unimpeded in earthquake relief and post-earthquake reconstruction. According to different anti-seismic mechanisms of structures, it can be divided into three methods: "anti-sei...

AI Technical Summary

Problems solved by technology

The ductile anti-seismic design of bridges mainly utilizes the plastic deformation of bridge piers, but it is difficult to repair damage and damage in the plastic hinge area of ​​bridge piers, which may lead to the collapse of bridge structures in severe cases

In the high-intensity area, when the bending moment in the plastic hinge area is too large for medium-short bridge piers, in order to ensure safety, it is very uneconomical to increase the cross-sectional area, and it is difficult to guarantee the ductility

Images