Examination of a Simple Ground Model to Estimate Local Seismic Waves in an Irregular Ground Area

摘要：

Accuracy of estimated seismic waves using a one-dimensional ground model is examined. Hiyoshi Area in Yokohama is focused, which has relatively complicated topography. First, two one-dimensional layered ground models are prepared: Model 1, a four-layered model based on a boring log and Model 2, a two-layered model based on airborne laser profiler and geological cross sections. Seismic records with peak ground acceleration 8 to 141 cm/s2 are used for analysis, which were observed by six seismic stations in the study area. Incident waves at bedrock level of each observation point are calculated by one-dimensional equivalent linear analysis.Two ground models are compared with respect to acceleration response spectra. Then, acceleration response spectra at bedrock level at each observation point are compared in regard to each earthquake event. The results suggest that it is necessary to increase the spatial density of bedrock data to make an accurate ground model and to consider influence of surface waves and oblique incidence in regard to the studied area.

关键词： Simplified Ground Model One-Dimensional Equivalent Linear Analysis Irregular Ground

作者: Munetatsu Horiike Shinsaku Tagawa Masayuki Kohiyama

作者单位: Student,Graduate School of Science and Technology,Keio University,Yokohama,Japan Formerly Student,Graduate School of Science and Technology,Keio University,Yokohama,Japan Associate Professor,Graduate School of Science and Technology,Keio University,Yokohama,Japan

会议类型: 国际会议

会议名称: 14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)

会议地点: 北京

会议语种:英文

在线出版日期: 2008-10-12（万方平台首次上网日期，不代表论文的发表时间）