期刊
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
卷 155, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.soildyn.2022.107191
关键词
Liquefaction in a high altitude area; M(s)7.4 Maduo earthquake; Liquefaction characteristics; Liquefaction occurrence conditions; Liquefaction evaluation method; Bridge damage
资金
- Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engi-neering Mechanics, China Earthquake Administration [2021EEEVL0104]
- Natural Science Foundation of Heilongjiang Province [ZD2019E009]
This study investigates and analyzes a rare large-scale liquefaction event that occurred at a high altitude on the Tibetan Plateau in 2021, contributing to the improvement of our understanding of liquefaction caused by earthquakes and the development of techniques for reducing liquefaction hazards.
Soil liquefaction due to earthquake activity can cause serious disasters, and post-earthquake investigation is the most direct means of understanding liquefaction issues. In this study, a rare large-scale liquefaction event that occurred at a high altitude of 4,200 m on the Tibetan Plateau in 2021 due to the M(s)7.4 Maduo earthquake is systematically investigated and analyzed. The macro phenomenon, geology, geomorphology, and geotechnology of the liquefaction zones are presented and compared with previous knowledge. The distribution characteristics of the seismic ground motion in the liquefaction zones is obtained and compared with the current understanding of the triggering conditions of liquefaction. Through comparison with field observations, the applicability of the existing two typical liquefaction evaluation methods is analyzed. Through analysis of a representative bridge failure event that occurred during this earthquake, the deficiency of the currently used specifications for liquefaction discrimination are revealed. The investigation and analysis results of this study on a historically rare liquefaction event are of significance for improving our knowledge of liquefaction caused by earthquakes and for developing liquefaction hazard reduction techniques.
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