FUNDAMENTAL STUDY ON EFFECTS OF DESIGN EARTHQUAKE GROUND MOTIONS ON SECTION SIZES OF RAILWAY BRIDGE

Abstract

 We did some seismic design of railway bridges in order to figure out effects of design earthquake ground motions on section sizes. Target structures are an RC rigid frame bridge and an RC pier which were designed by the rules of “Design Standards for Railway Structures and Commentary (Seismic Design)”. We used two types of design earthquake motions for designing each structures. One is smaller than the standard motions, and the other is larger than the standard. As a result, changing levels of the level-one earthquake motion made significant changes in section sizes of columns and pile foundations. It is expected that a minute examination of the level-one earthquake motion at the location makes seismic design more rational.