Abstract
In this study, we evaluate the influence of fault parameters on the ground motion characteristics and building response characteristics in the near-fault region, in order to develop the seismic design load for the Uemachi fault. We simulate ground motions in near-fault region changing several fault parameters using 3D-FDM. As results, the following conclusions are obtained. 1)Background of fault have little effect to near-fault pulse-like ground motion in the period range T>1.25s. 2)Peak ground velocity is affected by asperity size, rupture velocity, rise time, upper depth of asperity. 3)The pulse period on sedimentary layers depends on that of the bedrock and predominant periods of sedimentary layers. 4)The region where we should consider the influence of pulselike ground motions depends on the ratio of natural periods of buildings and pulse periods of the ground motion.
