Seismic Response Characteristics of Liquefiable Sites with and without Sediment Ejecta Manifestation
Seismic Response Characteristics of Liquefiable Sites with and without Sediment Ejecta Manifestation
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有无沉积物喷射现象的可液化场地地震响应特征
DOI：
10.1061/(asce)gt.1943-5606.0002506
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发表时间：
2021
影响因子：
3.9
通讯作者：
J. Bray
中科院分区：
文献类型：
--
作者：
Daniel Hutabarat;J. Bray
动态非线性有效应力分析的45个有据可查的液化现场的案例历史提供了现场的地震响应的见解，简化的液化触发程序表明液化的影响将是严重的，但无论是表面的表现没有观察到或不一致的沉积物喷出物的量进行了观察。沉积物喷出物的发生及其严重程度在很大程度上取决于强地面震动停止后的水力过程，而简化程序没有考虑到这一点。后震动平流过程管理的量向上渗漏引起的自流，决定喷出物的严重性。喷出物潜在指数（EPI）捕捉到液化表现的水力过程的这些关键方面。EPI可以敏感的变量，如水力传导率，地下水位，输入地面运动。然而，它被证明是一个有用的指数，以及相关的严重性，在现场的案例历史中观察到的喷出物表现。有严重喷出物的站点具有高EPI值，而没有喷出物的站点具有低EPI值。
Dynamic nonlinear effective stress analysis of 45 well-documented liquefaction field case histories provides insights on the seismic response of sites where simplified liquefaction triggering procedures indicated liquefaction effects would be severe but either surface manifestations were not observed or inconsistent amounts of sediment ejecta were observed. The occurrence of sediment ejecta and its severity depend significantly on hydraulic processes after strong ground shaking ceases, which the simplified procedures do not consider. Postshaking advection processes govern the amount of upward seepage–induced artesian flow that determines ejecta severity. The ejecta potential index (EPI) captures these key aspects of the hydraulic processes of liquefaction manifestation. EPI can be sensitive to variables such as hydraulic conductivity, groundwater level, and input ground motions. However, it proves to be a useful index that correlates well to the severity of ejecta manifestation observed in the field case histories. Sites with severe ejecta have high EPI values, and sites without ejecta have low EPI values.
DOI：
10.1201/9780429505980-2
发表时间：
2018-06
期刊：
--
影响因子：
--
作者：
R. Boulanger;J. DeJong
通讯作者：
R. Boulanger;J. DeJong
开发特定区域土壤行为类型指数相关性，用于评估新西兰基督城的液化危险
影响因子：
4
作者：
Maurer, B.W.;Green, R.A.;van Ballegooy, S.;Wotherspoon, L.
通讯作者：
Wotherspoon, L.