基于等效时间的蠕变本构模型推导  

Deduction of Equivalent Time Creep Constitutive Model

作　　者：占清华[1] 王世梅[1] 

机构地区：[1]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《人民黄河》2014年第4期123-125,共3页Yellow River

基　　金：三峡库区三期地质灾害防治重大科学研究项目(SXKY3-2-1);国家自然科学基金重点项目(50839004)

摘　　要：库水位升降引起的滑坡变形具有显著的时间效应,表现出明显的蠕变特征。根据殷建华的3-D EVP模型,采用π平面推导了不考虑主应力方向,只考虑主应力大小的各向同性的饱和土体剪切蠕变本构模型,以及采用八面体推导了既考虑主应力方向又考虑主应力大小的饱和土体剪切蠕变本构模型。Landslide deformation caused by the rise and fall of reservoir level has a significant time effect, which shows obvious creep characteris- tics. According to YIN Jian-hua of the 3-D EVP model, it deduced isotropie saturated soil shear creep constitutive model equations which without considering the main stress direction and only considering principal stress size and used octahedral to deduce saturated soil shear creep constitutive model equations which considering the main stress direction and taking into account principal stress size, thus simulating saturated soil under differ- ent shear stress state creep constitutive equation.

关 键 词：3-D EVP模型 剪切蠕变本构模型 π平面 八面体 

分 类 号：TV697.2[水利工程—水利水电工程] P642.22[天文地球—工程地质学]