Site characterizations for the Iranian strong motion network
Site characterizations for the Iranian strong motion network
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伊朗强震网络的站点特征
DOI：
10.1016/s0267-7261(98)00040-2
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发表时间：
1999
影响因子：
4
通讯作者：
M. Ghafory
中科院分区：
文献类型：
--
作者：
M. Zare;P. Bard;M. Ghafory
伊朗强震网络的 26 个站点提供了大量高质量的记录，被选中进行站点效应研究，目的是为后续伊朗强震数据的统计工作获得可靠的站点分类。对于每个站点，使用折射技术测量表面 Vp 和 Vs 轮廓，使用 H/V 技术获得微震记录并进行分析，并使用接收器函数技术获得可用的三分量加速度图。这些结果的汇总允许基于强地面运动的 H/V 谱比提出四级分类，这表明与 S 波速度剖面具有令人满意的相关性。与日本或加利福尼亚等其他地震国家相比，伊朗具有特殊的地质和气象条件，是一个气候干燥、大部分地区地下水位较低的山区国家。这些条件导致具有低频放大的站点数量相对较少，而许多站点在中频和高频范围内表现出中等放大。
Twenty-six sites of the Iranian strong motion network, having provided numerous records of good quality, were selected for a site effect study with the objective of obtaining a reliable site categorization for later statistical work on Iranian strong motion data. For each site, superficial Vp and Vs profiles were measured with refraction techniques, microtremor recordings were obtained and analysed with the H/V technique and the available three-component accelerograms by the receiver function technique. The aggregation of these results allows the proposition of a four-class categorization based on the H/V spectral ratio of strong ground motions, which demonstrate a satisfactory correlation with the S-wave velocity profile. Iran has a particular geological and meteorological situation compared to other seismic countries such as Japan or California, a mountainous country with dry weather conditions and a low water table in most areas. These conditions result in a relatively small number of sites with low frequency amplification, while many sites exhibit moderate amplifications in the intermediate and high frequency range.