Three alternative site‐response models are developed, using two complementing predictors, accounting for both stiffness and depth effects. The analysis is based on a large database of velocity profiles and their associated calculated amplifications with respect to the local generic rock profile. The frequency of peak amplification—fpeak—is chosen to supplement VS30⁠, after considering the predictability of eight different site proxies. The suggested models are continuous in terms of spectral periods as well as in terms of their predictor parameters—VS30 and fpeak⁠. Model performance is evaluated in terms of the reduction in variability. For example, for a spectral period of T=0.5 s⁠, using either one of the suggested models reduces the amplification variability from 0.4 to 0.18, whereas using VS30 alone reduces it only to 0.24. This improvement suggests that the addition of fpeak is a significant improvement in the midperiod range.

中文翻译：

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在以色列评估基于代理的站点响应

使用两个互补的预测因子，开发了三个替代的场地响应模型，同时考虑了刚度和深度影响。该分析是基于一个大型的速度剖面数据库及其相对于当地普通岩石剖面的相关计算放大率的数据库。考虑到八个不同站点代理的可预测性之后，选择峰放大频率（峰值）来补充VS30⁠。建议的模型在频谱周期以及预测变量VS30和fpeak⁠方面都是连续的。根据变异性的降低来评估模型性能。例如，对于T = 0.5 s？的频谱周期，使用任何一种建议的模型都可以将扩增变异性从0.4降低到0.18，而单独使用VS30只能将其降低到0.24。