水力发电学报2026，Vol.45Issue(5)：69-79,11.DOI:10.11660/slfdxb.20260506
平原土坝地震液化的能量判别模型及数值分析
Energy discrimination model for earthquake liquefaction of plain earth dams and numerical analysis
摘要
Abstract
Liquefaction of earth dams in plain areas with soft foundation of permeable layer poses a great threat to their safety.Previous liquefaction studies widely used in engineering were based on the stress of foundation soil,but this leads to a low accuracy due to the neglected effects of seismic load duration and randomness.This study presents an energy-based liquefaction discrimination method that calculates the normalized dissipated energy per unit soil volume and is implemented via finite element calculations for prediction of the liquefaction triggering possibility.We have verified the method using the historical records of soil liquefaction and achieved a good accuracy.In the case study of a plain reservoir,a three-dimensional model of its earth dam is constructed with the inclined incidence of ground motion being simulated,and the liquefaction region is predicted by this energy-based method.The results show its predictions improve significantly in comparison with the traditional stress method:the liquefaction locations are generally the same,both occurring at the dam toe and heel,but its ranges are more refined.Thus,our method would help theoretical and practical analysis of seismic liquefaction evaluation of earth dams in plain areas.关键词
土坝/地震液化/能量判别模型/有限元分析Key words
earth dam/seismic liquefaction/energy discrimination model/finite element analysis分类
建筑与水利引用本文复制引用
蔡志为,崔溦,季树凯..平原土坝地震液化的能量判别模型及数值分析[J].水力发电学报,2026,45(5):69-79,11.基金项目
国家自然科学基金资助项目(52479131) （52479131）
