SEISMIC PEFORMANCE OF A RC ARCH BRIDGE SUBJECTED TO FAULT DISPLECEMENT

Abstract

The concern for the destruction of structures by seismic fault displacement has increased since 1999 Taiwan Chi-Chi and Turkey Kocaeli earthquakes. Bridges in Japan has not been designed considering the fault displacements. In this paper two analyses are conducted for a RC arch bridge designed using the newest version of Japanese Highway Bridge Design Specification to clarify the seismic performance of the bridge. One is a parametric static analysis for various directions of fault displacements. According to this analysis seismic characteristics of the bridge for fault displacements are discussed. The other is dynamic analyses using acceleration time histories or displacement time histories including residual displacements. According to this analysis difference of response among static induced displacement analysis, dynamic analysis using acceleration or displacement time histories are compared, and the necessity of dynamic analysis using displacement time histories is discussed.