Insights from liquefaction ejecta case histories for the 2010–2011 Canterbury earthquakes

Insights from liquefaction ejecta case histories for the 2010–2011 Canterbury earthquakes
复制标题

2010 年至 2011 年坎特伯雷地震液化喷射物案例历史的见解

DOI:
10.1016/j.soildyn.2023.108267
复制
发表时间:
2024
影响因子:
4
通讯作者:
Bray, Jonathan D.
Bray, Jonathan D.
中科院分区:
工程技术2区
文献类型:
--
作者:
Mijic, Zorana;Bray, Jonathan D.

文献摘要

参考文献

相似文献

询问了2010-2011年坎特伯雷地震的详细液化喷出物案例历史数据库。在PGA6.1= 0.35-0.70g(其中PGA6.1是Mw6.1地震的峰值地面加速度)的震动下,在厚的、干净的砂土场地上发生超过50 mm的喷射物诱导的沉降,而在高度分层的粉土场地上,即使当PGA6.1超过0.45g时,喷射物诱导的沉降也不超过10 mm。不考虑土壤系统响应效应(如振动后水力机制)的基于静力锥贯入试验的液化引起的破坏指数高估了分层粉质土场地喷出物的严重程度。考虑后震动水力机制捕获缺乏喷出物在分层粉质土网站。它还改进了对具有严重到极端喷出物的净砂场地喷出物严重程度的估计。没有产生喷出物的强烈震动的净砂场地通常具有尖端阻力高的厚地层、厚的不可液化结壳或覆盖可液化地层的更深的不可液化地层。在2011年2月的地震中,在不可液化的地壳中形成了喷出物引起的裂缝,在2011年6月的地震中,深层液化的土壤可以利用这些裂缝产生喷出物。当道路上形成大量喷出物时,与房屋相邻的高架地面通常具有可忽略的喷出物。
A database of detailed liquefaction ejecta case histories for the 2010–2011 Canterbury earthquakes is interrogated. More than 50 mm of ejecta-induced settlement occurred at thick, clean sand sites shaken by PGA6.1= 0.35–0.70g(wherein PGA6.1is the peak ground acceleration for a Mw6.1 earthquake), whereas ejecta-induced settlement at highly stratified silty soil sites did not exceed 10 mm even when PGA6.1exceeded 0.45g. Cone penetration test-based liquefaction-induced damage indices that do not consider soil-system response effects, such as post-shaking hydraulic mechanisms, overestimate the severity of ejecta at stratified silty soil sites. Considering post-shaking hydraulic mechanisms captures the lack of ejecta at stratified silty soil sites. It also improves the estimation of ejecta severity at clean sand sites with severe-to-extreme ejecta. Strongly shaken clean sand sites that did not produce ejecta typically had thick strata with high tip resistances, thick non-liquefiable crusts, or deeper non-liquefiable strata overlying liquefiable strata. Ejecta-induced fissures formed in the non-liquefiable crust during the Feb 2011 earthquake which liquefied soil at depth could exploit to produce ejecta during the Jun 2011 earthquake. When significant ejecta formed on the roads, elevated adjacent ground with houses typically had negligible ejecta.
DOI: 10.1061/(asce)gt.1943-5606.0002506
发表时间: 2021
影响因子: 3.9
作者:
Daniel Hutabarat;J. Bray
通讯作者: J. Bray
使用锥入度测试估算液化喷射物的严重程度
DOI: 10.1061/(asce)gt.1943-5606.0002744
发表时间: 2022
影响因子: 3.9
作者:
Danny Hutabarat;J. Bray
通讯作者: J. Bray
2022 H. Bolton Seed 纪念讲座:评估液化效应
DOI: 10.1061/jggefk.gteng-11242
发表时间: 2023
影响因子: 3.9
作者:
Bray, Jonathan D.;Olaya, Franklin R.
通讯作者: Olaya, Franklin R.
基督城原生粉质土的循环单调简单剪切试验
DOI: --
发表时间: 2021
期刊:
影响因子: --
作者:
Z. Mijić;J. Bray;M. Riemer;Sean D. Rees;M. Cubrinovski
通讯作者: M. Cubrinovski
通过可液化部位的有效应力分析来估计沉积物喷射物的严重程度
DOI: 10.1061/(asce)gt.1943-5606.0002503
发表时间: 2021
影响因子: 3.9
作者:
Daniel Hutabarat;J. Bray
通讯作者: J. Bray