Analysis of Transverse X shaped Elastic plastic Damper’s Proper Parameters on Irregular Girder Bridges

Abstract:

An X shaped elastic plastic damper (XSEPD) was used to replace the concrete shear key for girder displacement control and seismic response mitigation of substructures. First, the force displacement relationship of laminated rubber bearing (LRB) and XSEPD was analyzed. Then, the effect of different XSEPD layouts on transverse seismic response of the bridge was investigated through parametric study based on a typical irregular girder bridge. Results indicate that XSEPD can effectively control pier girder relative displacement and reasonably distribute seismic forces among piers if the proper design parameters are selected.