Reconsidering basin effects in ergodic site response models
Reconsidering basin effects in ergodic site response models
复制标题
重新考虑遍历站点响应模型中的盆地效应
DOI：
--
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
J. Stewart
中科院分区：
文献类型：
--
作者：
C. Nweke;Pengfei Wang;S. Brandenberg;J. Stewart
我们研究了在遍历地震动模型中将盆地响应区域化的好处。利用南加州的数据，我们发现了盆地结构之间的平均响应，即使在控制了地震动模型中使用的主要场地变量(VS30和深度参数)的情况下也是如此。例如，目前的模型对相对中等规模的沉积构造(如西米谷)的平均场地响应在短期内预测不足，而对于较大的沉积构造，则在较长时期内预测不足。此外，在大型盆地、盆地边缘、较小的山谷和非盆地(山区)地点之间，现场与现场的事件内标准差有显著差异。这样的变化可以明显地影响射精的可变性。检查相对于NGA-West2模型的数据集的残差。这些残差分析调查了关于场地类别和特定地质结构(如洛杉矶盆地)的模型偏差。残差的离散度被用来调查不同类别和不同特定盆地之间的地点间变异性的变化。这些结果被解释为对如何改进盆地模型以用于南加州的地面运动建模提供了见解。
We investigate benefits of regionalizing basin response in ergodic ground motion models. Using southern California data, we find average responses between basin structures, even when the primary site variables used in ground motion models ( V S30 and depth parameters) are controlled for. For example, the average site response in relatively modestly sized sedimentary structures (such as Simi Valley) are under-predicted at short periods by current models, whereas under-prediction occurs at long periods for larger sedimentary structures. Moreover, site-to-site within-event standard deviations vary appreciably between large basins, basin edges, smaller valleys, and non-basin (mountainous) locations. Such variations can appreciably impact aleatory variability. examines residuals of the data set relative to NGA-West2 models. These residuals analyses investigate model bias with respect to site categories and specific geologic structures such as the Los Angeles basin. The dispersion of residuals is used to investigate changes in site-to-site variability between categories and between specific basins. The results are interpreted to provide insights into how basin models can be improved for ground motion modeling in southern California.
SCEC 统一社区速度模型软件框架
影响因子：
3.3
作者：
Small, Patrick;Gill, David;Maechling, Philip J.;Taborda, Ricardo;Callaghan, Scott;Jordan, Thomas H.;Olsen, Kim B.;Ely, Geoffrey P.;Goulet, Christine
通讯作者：
Goulet, Christine