沥青混凝土心墙风化料坝三维应力-变形分析

Three-dimensional Stress-deformation Analysis of Weathering Dam with Asphalt Concrete Core Wall

基于大型商业有限元软件ABAQUS,并利用ABAQUS平台提供的UMAT子程序接口开发了邓肯-张材料本构模型,研究轿子山水库沥青混凝土心墙风化料坝的应力-变形特性,为大坝设计的合理性以及工程施工后的安全性评价提供依据.有限元计算结果表明:坝体及心墙变形值基本合理,大坝的变形以及应力性态较好,心墙各高程处计算的垂直应力均大于该处的水压力强度,对防止产生水力劈裂和大坝蓄水后的安全运行是有保障的.

On the basis of subroutine UMAT provided by ABAQUS, the Duncan-Chang nonlinear elastic model for static analysis is implemented. Then, the finite element software ABAQUS is used to analyze the stress and deformation characteristics of a weathering dam with asphalt concrete core wall in Jiaozishan Reser- voir. The study results can provide a basis for the safety evaluation of the dam. The finite element analysis re- sults show that the deformations of the dam and the core wall are quite reasonable. The deformation and stress state of the dam are very well. （The computed vertical stress at the location of core wall is greater than the water pressure strength; it is indicated that the dam is unable to arise hydraulic fracturing. The safety of the dam after water storage can be guaranteed.