Liquefaction Triggering, Consequences, and Mitigation
Liquefaction Triggering, Consequences, and Mitigation
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液化触发、后果和缓解
DOI：
10.1061/9780784481455.018
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Rodriguez-Marek, Adrian
中科院分区：
文献类型：
--
作者：
Upadhyaya, Sneha;Maurer, Brett W.;Green, Russell A.;Rodriguez-Marek, Adrian
The liquefaction potential index (LPI) was found to significantly overpredict the severity of observed liquefaction for a large subset of case histories compiled from Canterbury, New Zealand, earthquakes. One potential cause for these overpredictions is the presence of non-liquefiable capping and interbedded strata with high fines-content and/or plasticity that suppress surficial liquefaction manifestations. Herein, receiver-operating-characteristic analyses of compiled Canterbury, New Zealand, liquefaction case histories are used to investigate LPI performance as a function of the soil-behavior-type index averaged over the upper of 20 m (Ic20) of a profile;Ic20is used to infer the amount of high fines-content, high-plasticity strata in a profile. It is shown that generally: (1) the relationship between computed LPI and the severity of surficial liquefaction manifestations isIc20-dependent; and (2) the ability of LPI to segregate cases on the basis of observed manifestation severity using LPI decreases with increasingIc20. In conjunction with previous studies, these findings support the need for an improved index that more adequately accounts for the mechanics of liquefaction triggering and manifestation.
