沥青混凝土心墙堆石坝应力变形有限元分析  

Finite element analysis of stress and deformation of asphalt concrete core rockfill dam

作　　者：褚福永 CHU Fuyong(College of Engineering and Design,LiShui University,LiShui,Zhejiang 323000,China)

机构地区：[1]丽水学院工程与设计学院,浙江丽水323000

出　　处：《江苏建筑职业技术学院学报》2018年第4期5-8,共4页Journal Of Jiangsu Vocational Institute of Architectural Technology

基　　金：丽水市高层次人才项目(2015RC16)

摘　　要：利用椭圆-抛物双屈服面模型,对某沥青混凝土心墙土石坝进行三维有限元计算分析,研究了坝体在竣工期、蓄水期坝体的应力变形特性.计算结果表明:坝体竣工期最大沉降为50.86cm,占最大坝高(包括覆盖层,计69m)0.4%.坝体蓄水期最大值为50.5m,占最大坝高0.397%.顺河向水平位移较小.其中,竣工期向下游水平最大位移为5.58cm,向上游水平最大位移为4.5cm.蓄水期向上游水平最大位移为8.5cm.竣工期和蓄水期坝体大主应力分布规律相似,且竣工期和蓄水期均存在心墙拱效应.心墙小主应力均大于零,即没有出现拉应力.竣工期和蓄水期坝体的应力水平均不高.Based on the elliptic-parabolic double yield surface model,the three-dimensional fi-nite elementanalysisof an asphaltconcretecoreearth-rockdamiscarriedout,and thestress and deformation characteristics of the dam during the completion and storage periods are studied. The results show that the maximum settlement of dam body is 50.68cm under completion storage, which accounts for the 0.4 percent of the maximum dam height. The maximum settlement of dam body is 50.5cm under water storage,which accounts for the 0.397 percent of the maximum dam height. The horizontal displacement along river is less. Among them, the maximum horizontal displacement toward downstream is 5.58cm and the maximum horizontal displacement toward upstream is 4.5cm under completion storage and the maximum horizontal displacement toward upstream is 8.5cm under water storage. The laws of distribution of principal stress are similar between under completion storage and under water storage and there exist some arc effect of core wall under both completion storage and water storage. The minor principal stresses of core wall are all greater than zero, which means there is no tensile stress.On the whole, the stress level of dam body is not high.

关 键 词：沥青混凝土心墙 堆石坝 有限元 弹塑性模型 应力变形 

分 类 号：TU411.5[建筑科学—岩土工程]