Evaluating Liquefaction Triggering Potential Using Seismic Input Parameters that Are Consistent with ASCE 7-16
Evaluating Liquefaction Triggering Potential Using Seismic Input Parameters that Are Consistent with ASCE 7-16
复制标题
使用符合 ASCE 7-16 的地震输入参数评估液化触发潜力
DOI：
10.1061/9780784482810.010
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Green, R.A. and
中科院分区：
文献类型：
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作者：
Green, R.A. and
ASCE 7-16 详细说明了如何确定峰值地面加速度 (PGA) 以评估液化触发，该 PGA 反映了一系列地震震级对场地地震危险性的影响。类似地，Finn 和 Wightman 震级加权方案可用于考虑影响某个地点地震灾害的全部震级，其中权重源自该地点的地震灾害分解数据。然而，美国中部/东部地震危险图的分解数据仅适用于岩石运动，而不适用于土壤剖面表面的运动。作者通过比较美国西部多个地点的加权平均震级缩放因子 (MSF) 和深度应力加权因子 (rd) 值来探讨这个问题，这些值是使用岩石运动和土壤剖面表面运动的解聚数据开发的。基于这些比较，作者发现，使用岩石条件的 PGA 解聚数据对于 MSF 和 rdas 会产生与使用土壤剖面表面的 PGA 解聚数据计算出的相似的加权平均值。
ASCE 7-16 details how the peak ground acceleration (PGA) should be determined for evaluating liquefaction triggering, with this PGA reflecting the influence of a range of earthquake magnitudes on a site’s seismic hazard. Similarly, the Finn and Wightman magnitude-weighting scheme can be used to account for the full range of magnitudes influencing the seismic hazard at a site, where the weights are derived from a site’s seismic hazard deaggregation data. However, the deaggregation data for the seismic hazard maps for the Central/Eastern U.S. are only available for rock motions and not motions at the surface of the soil profile. The authors explore this issue by comparing the weighted average magnitude scaling factors (MSF) and depth-stress weighting factor (rd) values for multiple sites in the Western U.S. developed using deaggregation data for rock motions and for motions at the surface of the soil profiles. Based on these comparisons, the authors found that using the PGA deaggregation data for rock conditions yield similar weighted averages for MSF and rdas those computed using deaggregation data for the PGA at the surface of the soil profile.