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Liquefaction-induced ground damages during the 2010 Chile earthquake

机译：2010年智利地震期间液化引起的地面破坏

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摘要

The second-strongest earthquake recorded in Chile's history, only exceeded by the 1960 Valdivia earthquake of Magnitude 9.5, occurred on February 27, 2010. This mega thrust-faulting type earthquake of Magnitude 8.8 struck the Central-South region. The shaking duration of each acceleration record was computed, and the longest records were coincident with the area of maximum crustal co-seismic deformations. Liquefaction sites covered an extension close to 1000 km, which approximately represents twice the length of the rupture zone. It was confirmed that tailings dams built using the upstream construction method are seismically unsafe, thus efforts must be done by governments in order to identify and prevent failures of existing old tailings dams. On the other hand, it is shown that in high seismic regions a stratified structure consisting of a sequence of loose (liquefiable) and dense (non-liquefiable) sandy layers should be expected, making the analysis more complex. (C) 2015 Elsevier Ltd. All rights reserved.
机译：智利历史上第二强的地震发生在2010年2月27日，仅次于1960年的瓦尔迪维亚9.5级大地震。这场特大的8.8级逆冲断层地震袭击了中南部地区。计算每个加速度记录的震荡持续时间，最长记录与最大地壳同震变形的面积一致。液化场覆盖了接近1000 km的延伸，大约是破裂带长度的两倍。可以肯定的是，采用上游施工方法建造的尾矿坝在地震上是不安全的，因此，政府必须做出努力，以识别和防止现有的旧尾矿坝发生故障。另一方面，表明在高地震区，应期望由一系列松散（可液化）和致密（不可液化）的沙层组成的分层结构，从而使分析更加复杂。 （C）2015 Elsevier Ltd.保留所有权利。

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