水利学报Issue(7)：828-836,9.DOI:10.13243/j.cnki.slxb.2014.07.009
考虑材料非均质性的胶凝砂砾石坝随机有限元分析
Stochastic finite element analysis of Hardfill dam with considering the material heterogeneity influence
摘要
Abstract
Based on the collection, sortation, statistics and analysis of Hardfill material mechanics perfor-mance indexes, Monte-Carlo stochastic finite element method is adopted to study the static working behav-ior of Hardfill dam with considering the heterogeneity of material mechanical properties influence and the random field of the modulus of elasticity has been built. The results show that the displacement response is small and the amplitude of changes is not more than 13.7 %, while the stress response is relatively greater and the amplitude of changes is not less than 18.8 % and maximum reaches 110.5 %. The mean responses of stress and deformation of dam are consistent with the homogeneous model. The variability of stress and deformation of the upstream and downstream, the top, the heel, and the toe of the dam is strong and the maximum variation coefficient reaches 0.21, while the internal part of the dam is not very prominent and the coefficient of variation is not more than 0.08. After the superposition with three times standard devia-tion, the rate of the displacement of the extreme points is not more than 5 %, while the rate of the stress of the extreme points is not less than 18.4% and maximum reaches 375%.关键词
胶凝砂砾石材料/非均质性/Monte-Carlo随机有限元/统计分析Key words
Hardfill material/heterogeneity/Monte-Carlo stochastic finite element method/statistical analy-sis分类
建筑与水利引用本文复制引用
孙伟,何蕴龙,袁帅,熊堃..考虑材料非均质性的胶凝砂砾石坝随机有限元分析[J].水利学报,2014,(7):828-836,9.基金项目
国家自然科学基金资助项目(50679058) （50679058）
