SITE CLASSIFICATION FOR STRONG-MOTION STATIONS IN JAPAN USING H / V RESPONSE SPECTRAL RATIO
SITE CLASSIFICATION FOR STRONG-MOTION STATIONS IN JAPAN USING H / V RESPONSE SPECTRAL RATIO
复制标题
使用水平/垂直响应谱比对日本强震站进行站点分类
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
T. Takahashi
中科院分区：
文献类型：
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作者：
John X. Zhao;K. Irikura;J. Zhang;Y. Fukushima;P. Somerville;A. Asano;T. Saiki;H. Okada;T. Takahashi
拥有一个可靠的场地分类方案对于开发鲁棒的强震衰减模型至关重要。我们讨论了一个有前途的网站分类计划的基础上，从日本的强震数据。我们分配的网站类别的K-网络的网站钻孔达到岩石或硬土剪切波速度为700米/秒或更大，使用四个网站类别定义的主导网站周期。水平和垂直分量（H/V）的地震记录从这些sties的反应谱比被发现没有强烈的影响JMA震级，震源距离，震源深度为所有网站类。我们使用H/V比的记录从分类的K-网网站，建立一个网站分类指数使用的平均光谱比和标准偏差的比率。使用该指数，我们能够对土层厚度超过20米的K网台站和日本其他强震台站进行分类。根据新的立地分类，从立地类别项计算出的立地放大系数与为这些立地类别定义的周期带一致。
Having a reliable site classification scheme is vital for the development of robust strong-motion attenuation models. We discuss a promising site classification scheme based on strong-motion data from Japan. We assigned site classes for those K-net sites where boreholes reached either to rock or to stiff soils with shear-wave velocity of 700m/s or larger, using four site classes defined by dominant site period. The response spectral ratios of the horizontal and vertical components (H/V) of earthquake records from these sties were found not to be strongly affected by JMA magnitude, hypocentral distance, and focal depth for all site classes. We used H/V ratios for records from the classified K-net sites to establish a site classification index using the mean spectral ratios and the standard deviations of the ratios. Using the index, we were able to classify both K-net stations with soil layers thicker than 20m and other strongmotion stations in Japan. The site amplification factors calculated from the site class terms based on the new site classification are consistent with the period bands defined for these site classes.