基于ANSYS二次开发的水库围堤地基液化分析

基于ANSYS有限元软件二次开发,对某水库围堤地基进行液化分析.选取具有代表性的围堤断面建立二维有限元模型,计算得到场地建围堤前后孔隙水压力与有效应力比的分布情况以及建围堤后坝体的震陷分布情况.计算结果表明,地基中心部位的孔隙水压力比比两侧的孔隙水压力比小,围堤地基中心部位可以不进行地基液化处理,堤脚压重可以有效地降低液化程度.该成果可作为其他类似工程设计的参考.

Analysis on Liquefaction of Embankment Foundation of Reservoir by Secondary Development of ANSYS

Based on secondary development of ANSYS, analysis on liquefaction of embankment foundation of a reservoir is performed. Two-dimensional finite element model of representative embankment section is set up, and distribution of ratios of pore water pressure and effective stress before and after the construction of the embankment and distribution of seismic sub- sidence of the embankment are obtained by calculatiol~ As demonstrated by the calculation results, ratio of pore water pressure of central part of the embankment foundation is smaller than that of both sides of the embankment foundation, and foundation treatment for eliminating liquefaction is not necessary for the central part of the dam foundation, and liquefaction degree can be effectively reduced by loading on both sides of the embankment foundation. The achievement can provide references for design of other similar projects.