Development of region-specific soil behavior type index correlations for evaluating liquefaction hazard in Christchurch, New Zealand

Development of region-specific soil behavior type index correlations for evaluating liquefaction hazard in Christchurch, New Zealand
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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

DOI:
10.1016/j.soildyn.2018.04.059
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发表时间:
2019
影响因子:
4
通讯作者:
Wotherspoon, L.
Wotherspoon, L.
中科院分区:
工程技术2区
文献类型:
--
作者:
Maurer, B.W.;Green, R.A.;van Ballegooy, S.;Wotherspoon, L.

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利用来自新西兰克赖斯特彻奇的前所未有的现场和实验室测试数据数据库,本研究开发了土壤行为类型指数(Ic)与基于实验室测试的液化敏感性和细粒含量之间的确定性和概率相关性。提出的相关性反过来用于评估9623个案例研究的液化危害,这些案例研究来自影响新西兰克赖斯特彻奇的三次地震,其中预测的液化严重程度与地震后的现场观测进行了比较。此外,基于区域特定相关性的预测的准确性与使用通用相关性的预测的准确性进行了比较。一般来说,使用基督城特有的相关性只能略微提高液化严重程度的预测。这些发现可能是用于预测液化触发和/或液化表现的程序存在缺陷的结果。然而,这些发现为典型项目的通用相关性的使用提供了依据。最后,本文使用的研究总体框架可以应用于全球的当地人,而不仅仅局限于新西兰坎特伯雷地区的使用。
Utilizing an unprecedented database of field and laboratory test data from Christchurch, New Zealand, this study develops deterministic and probabilistic correlations relating the soil behavior type index (Ic) to laboratory test-based liquefaction susceptibility and fines content. The proposedIccorrelations are in turn used to assess liquefaction hazard for 9623 case studies compiled from three earthquakes that impacted Christchurch, New Zealand, wherein the predicted liquefaction severity is compared to post-earthquake field observations. Furthermore, the accuracy of the predictions based on the region-specificIccorrelations are compared to those made using genericIccorrelations. The use of the Christchurch-specificIccorrelations, in general, only slightly improved the liquefaction severity predictions. These findings could be a result of shortcomings in the procedures used to predict liquefaction triggering and/or liquefaction manifestations. Nevertheless, the findings give credence to the use of generic correlations for typical projects. Finally, the overall framework of the study used herein can be applied to worldwide locals and is not just limited for use in the Canterbury region of New Zealand.
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