Ground‐shaking mapping for a scenario earthquake considering effects of geological conditions: a case study for the 1995 Hyogo‐ken Nanbu, Japan earthquake
Ground‐shaking mapping for a scenario earthquake considering effects of geological conditions: a case study for the 1995 Hyogo‐ken Nanbu, Japan earthquake
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考虑地质条件影响的情景地震地面震动测绘：以 1995 年日本兵库县南部地震为例
DOI：
10.1002/eqe.207
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发表时间：
2002
影响因子：
4.5
通讯作者：
S. Midorikawa
中科院分区：
文献类型：
--
作者：
K. Fujimoto;S. Midorikawa
为了检验地面震动绘图技术对近场地震的适用性，将根据考虑地质条件影响的地震区划方法计算出的1995年日本兵库县南部地震的峰值地面速度图与实际观测到的烈度图进行了比较。在计算地震动图时，每个场地的场地放大率是根据相应地貌条件估计的地面平均剪切波速计算的。这张图显示出与观测到的强度图相对较好的一致性。然而，计算提供了较小的值为某些灾难性的地区的地震，在地面运动的影响，深，不规则的地下结构已报告。这样的结构对现场响应的影响进行检查实施二维有限元分析，从而也被纳入该方法。考虑不规则地下结构的影响，计算结果与实测烈度图吻合较好。版权所有© 2002年约翰威利父子有限公司。
In order to examine the applicability of ground‐shaking mapping techniques to a near‐field earthquake, a peak ground velocity map of the 1995 Hyogo‐ken Nanbu, Japan earthquake computed from seismic zoning methods that consider the effects of geological conditions is compared with the actual observed intensity map. When computing the ground‐shaking map, the site amplification at each site is calculated in terms of the average shear‐wave velocity of the ground estimated from the corresponding geomorphological conditions. This map shows a relatively good agreement with the observed intensity map. However, the computations provide smaller values for certain disastrous areas of the earthquake, where the effects on ground motion of a deep, irregular underground structure have been reported. The effect of such structures on site response is examined implementing 2D FEM analyses, thereby being also incorporated into the method. Results considering the effect of the irregular underground structure show better agreement with the observed intensity map. Copyright © 2002 John Wiley & Sons, Ltd.