断層モデルを用いた強震地動の推定手法に関する研究 : 解析手法とその特性

抄録

The ground motion due to earthquake occurrence is strongly affected by the earthquake process itself, the propagating path of seismic waves, the topography of the ground surface and the properties of ground surface layers. These factors cause damage to buildings and other structures in different ways. That is, buildings behave differently for each earthquake. In order to have more reasonable seismic standards, it is necessary to examine how each factor mentioned above contributes to the actual motion. Recently, many trials to have realistic earthquake input to structures have been conducted. They are pseudo-ground motion, superposition of many seismic waves from aftershocks, etc. In this study we propose an improved method for synthetic ground motions, by taking the actual focal process into consideration. As a result, it is pointed out that the proposed method is appropriate for the realistic earthquake input motion to structures.