摘要
本文建议一种适合混凝土材料的椭圆抛物双屈服面弹塑性模型，并将其应用于某土石坝混凝土防渗墙计算比较中，结果表明：对处于低应力水平状态的混凝土，不必使用弹塑性模型；相反，对于应力水平较高的混凝土结构，采用弹塑性模型时的计算应力比弹性模量取常量时的计算应力小，更为合理．对塑性混凝土，应采用弹塑性本构模型计算．
A elasto plastic constitutive model with elliptic parabolic yield surface which is suitable for concrete materials is presented in this paper.It is used to compute an earth rock dam which has concrete cut off.The result shows that the model is not necessary for common concrete which is at a low level of stress,whereas,the model is more reasonable when the structure is at high stress level.The model should be used if it is plastic concrete.
出处
《水利学报》
EI
CSCD
北大核心
1997年第7期19-23,共5页
Journal of Hydraulic Engineering
基金
国家"八.五"攻关项目
关键词
土石坝
混凝土
防渗墙
弹塑性模型
dam,concrete cut off,finite element method,constitutive model,elasto plastic model.
