EVALUATION OF RESPONSE OF PC SYNTHETIC GIRDER BRIDGE CONSIDERING FAULT DISPLACEMENT AND CONTACT OF GIRDER END

Abstract

 In Japan’s expressway, even if the large scale earthquake of level 2 occurs, it is required that emergency vehicles can pass through within 24 hours. However, due to the characteristics of the earthquake motions and the effects fault displacement, it is difficult to determine the part which should be inspected immediately in the emergency check of the bridge after an earthquake. In 2017, in response to the Kumamoto earthquake that occurred in 2016, specifications for highway bridges was revised to consider active faults. In addition to the earthquake ground motions that have been considered in the conventional seismic design, it is necessary to consider the earthquake resistance of the bridge considering the fault displacement from now on. In this study, the influence of the fault displacement on the safety of the bridge is investigated by examining the response of the bridge when the ground earthquake fault occurs to the bridge near the fault zone.