ABSTRACT
In this paper, the seismic performance of a continuous rigid frame bridge with double thin-wall piers based on super high-damping seismic isolation rubber bearing has been studied and established in a dynamic mode by using nonlinear time history analysis. The study simulates four groups of seismic wave acceleration time history curves manually and takes the international land port municipal infrastructure project Weihe No. 5 bridge as the engineering background. The bridge site is located in the Weihe River valley section, which belongs to the temperate semi-humid and semi-arid climates. The seismic fortification intensity of the bridge is 8 degrees, and the peak acceleration is 0.3 g. The main beam of the bridge is a prestressed concrete continuous box girder of variable height, and the bridge tower and the main beam are in the form of consolidation. The results show that the super high-damping seismic isolation rubber bearing can not only reduce the seismic response but also avoid the excessive displacement of the structure. It is more suitable for continuous rigid frame bridges with double thin-wall piers in high-intensity areas, which is compared with ordinary plate rubber bearings. The isolation effect of super high-damping seismic isolation rubber bearing is influenced by the geometric parameters of the double-wall piers. The increase of wall thickness and center-to-center distance of double piers can give rise to the increase of seismic response of the structure.
