Ground‐Motion Prediction Equation for the Chilean Subduction Zone
Ground‐Motion Prediction Equation for the Chilean Subduction Zone
复制标题
智利俯冲带的地面运动预测方程
DOI：
10.1785/0120160221
复制
发表时间：
2017
影响因子：
3
通讯作者：
A. Rodriguez
中科院分区：
文献类型：
--
作者：
G. Montalva;N. Bastías;A. Rodriguez
摘要建立了智利俯冲带响应谱值水平分量的地震动预测方程。该数据集包含来自473次地震的3774条记录，包括该国发生的最新大型逆冲事件（即2010年Maule 8.8 M， 2014年Iquique M 8.1 M和2015年Illapel M 8.3 M）。中位数模型的函数形式遵循Abrahamson等人（2016）的建议。根据vs30估算场地效应。另一个模型仅使用与vs30测量值相关的地面运动和可靠的mw估计（称为高质量[HQ]模型）建立。HQ模型的标准偏差远低于主模型，特别是与站点间变异性相对应的标准偏差部分，这表明更好的站点表征可以显著降低地面运动估计中的总体不确定性。电子补充：高质量（HQ）模型的回归系数表和模型系数的95%置信区间，以及地面运动预测方程（GMPE）的MATLAB实现。
Abstract A ground‐motion prediction equation for the horizontal component of the response spectral values from the Chilean subduction zone is developed. The dataset contains 3774 recordings from 473 earthquakes, including the latest megathrust events that occurred in the country (i.e., 2010 M w 8.8 Maule, 2014 M w 8.1 Iquique, and 2015 M w 8.3 Illapel). The functional form for the median model follows the proposal by Abrahamson et al. (2016). Site effects are estimated based on V S 30 . An additional model is built using only ground motions associated with measured values of V S 30 and reliable M w estimates (termed the high‐quality [HQ] model). The standard deviation of the HQ model is much lower than the main model, particularly the component of the standard deviation that corresponds to site‐to‐site variability, indicating that better site characterization can significantly reduce the overall uncertainty in ground‐motion estimation. Electronic Supplement: Tables of regression coefficients for the high‐quality (HQ) model and 95% confidence intervals for model’s coefficients and MATLAB implementation of the ground‐motion prediction equation (GMPE).