Taiwan-Specific Model for V S30 Prediction Considering Between-Proxy Correlations
Taiwan-Specific Model for V S30 Prediction Considering Between-Proxy Correlations
复制标题
考虑代理间相关性的台湾特定 V S30 预测模型
DOI：
10.1193/061217eqs113m
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发表时间：
2018
影响因子：
5
通讯作者：
P. Sun
中科院分区：
文献类型：
--
作者：
O. Kwok;J. Stewart;D. Kwak;P. Sun
各态历经场地响应模型通常以上部30 m（VS 30）的时间平均剪切波速度为条件。地震动数据库包含许多来自台湾的记录，并且由于场地表征的努力，56%的记录场地具有来自测量的VS 30。我们开发基于代理的VS 30预测模型，其中一个应用是针对台湾其余44%的站点。我们的方法，这可以适用于其他地区，不同于以往的研究中，代理是基于详细的地质类别和可能的类别内地形梯度的影响。相反，我们使用三个广泛的，基于年龄的地质类别，并为最年轻的类别全新世和第四纪未分割的沉积物，我们提出了模型的梯度和海拔。我们还采用了基于地貌地形的方法，从而提供了两个VS30预测模型。我们描述了一个模型加权方案，考虑到它们的相对分散和相关性，结合模型，产生加权平均值和标准差自然对数VS 30。包括作为电子补充是一个剖面数据库文件和一个网站数据库与台湾地面运动站的网站参数。
Ergodic site response models are generally conditional on the time-averaged shear wave velocity in the upper 30 m (VS30). Ground motion databases contain many recordings from Taiwan, and because of site characterization efforts, 56% of recording sites have VS30 derived from measurements. We develop proxy-based VS30 prediction models, one application of which is for the remaining 44% of Taiwan sites. Our approach, which can be suitable for other regions, differs from previous studies in which proxies are based on detailed geologic categories and possible within-category topographic gradient effects. Instead, we use three broad, age-based geologic categories, and for the youngest category of Holocene and Quaternary undivided sediments, we propose models conditioned on gradient and elevation. We also adapt a geomorphic terrain-based method, thus providing two VS30-prediction models. We describe a model weighting scheme that combines the models in consideration of their relative dispersions and correlation, producing a weighted mean and standard deviation natural-log VS30. Included as an electronic supplement is a profile database file and a site database with site parameters for Taiwan ground motion stations.