Uncertainty and Spatial Correlation of Earthquake Ground Motion in Taiwan
Uncertainty and Spatial Correlation of Earthquake Ground Motion in Taiwan
复制标题
DOI：
10.3319/tao.2010.05.03.01(t
复制
发表时间：
2010-12
影响因子：
0.8
通讯作者：
V. Sokolov;F. Wenzel;W. Jean;K. Wen
中科院分区：
文献类型：
--
作者：
V. Sokolov;F. Wenzel;W. Jean;K. Wen
在这项工作中，我们分析了在台湾的峰值地面加速度预测的事件内和事件间分量的偶然变化的特性和地面运动残差的空间（站点到站点）相关性。这些特征对于评估区域性建筑物资产（资产组合）和空间分布系统（生命线）的地震危害和损失以及生成ShakeMap非常重要。本研究利用台湾TSMIP强震台网1993-2004年期间所收集的强震资料库，包括66个震源深度小于30 km、M（下标L）>4.5的浅源地震的4650条记录。分析结果表明，地震动相关结构高度依赖于当地的地质和传播路径的特性（依赖于方位角的衰减）。因此，一个单一的广义空间相关模型可能不适合所有的台湾领土或类似的大面积。
In this work we analyzed characteristics of aleatory variability with regard to intra-event and inter-event components in the prediction of peak ground acceleration in Taiwan and the spatial (site-to-site) correlation of ground motion residuals. The characteristics are very important for an assessment of seismic hazard and loss for regionally located building assets (portfolio) and spatially distributed systems (lifelines) and ShakeMap generation. The strong-motion database collected by the TSMIP network in Taiwan, which includes about 4650 records from 66 shallow earthquakes (M(subscript L)＞4.5, focal depth＜30 km) occurred in 1993-2004, was used for this purpose. The results of the analysis show that the ground motion correlation structure is highly dependent on local geology and on peculiarities of the propagation path (azimuth-dependent attenuation). Thus, a single generalized spatial correlation model may not be adequate for all of Taiwan territory or similar large areas.