Effect of earthquake ground motions on soil liquefaction
Effect of earthquake ground motions on soil liquefaction
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DOI：
10.1016/j.sandf.2012.11.006
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发表时间：
2012-10
影响因子：
3.7
通讯作者：
S. Unjoh;M. Kaneko;S. Kataoka;K. Nagaya;Kazunari Matsuoka
中科院分区：
文献类型：
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作者：
S. Unjoh;M. Kaneko;S. Kataoka;K. Nagaya;Kazunari Matsuoka
在2011年日本历史上最大的地震东北太平洋沿岸地震中，包括东京湾地区在内的东北和关东的太平洋沿岸沿着的广大地区都出现了土壤液化现象。土壤液化对住宅用地和房屋以及道路、河流、港口和供水/排污系统等基础设施造成了广泛的损害。由于2011年东北太平洋沿岸地震发生在面积为500 km×200 km的巨型断层带中，因此与以往地震记录的数据相比，强烈震动的持续时间非常长。阐明地震动特性对土壤液化机理的影响是研究的重要内容之一，也是对受损结构物采取有效对策的重要内容。本文介绍了在液化和非液化场地上获得的强震动观测资料，并根据这些资料对土壤液化机理进行了初步探讨。的持续时间和循环荷载的数量上的土壤液化现象的进展的效果也比较发现在过去的强震数据。
During the 2011 off the Pacific Coast of Tohoku Earthquake, which was the largest earthquake in Japanese history, the soil liquefaction phenomenon was observed over a wide area along the Pacific Coast in Tohoku and in Kanto, including the Tokyo Bay area. Extensive damage was caused by the effect of soil liquefaction to residential lands and houses, as well as to infrastructures, such as roads, rivers, ports, and water supply/sewage systems. Since the 2011 off the Pacific Coast of Tohoku Earthquake occurred in a mega-size fault zone, with an area of 500 km×200 km, the duration of the strong shaking was extremely long compared to that in the data recorded for past earthquakes. Clarifying the effect of the characteristics of the ground motion on the soil liquefaction mechanism is one of the essential studies to be conducted, and effective countermeasures for the damaged structures need to be found.This paper presents the strong motion observation data obtained on the liquefied and the non-liquefied grounds and raises preliminary discussions on the mechanism of soil liquefaction based on this data. The effect of the duration and the number of cyclic loadings on the progress of the soil liquefaction phenomenon is also compared with that found in past strong motion data.