MODELLING STRAIN-RATE-DEPENDENCY OF NATURAL SOFT CLAYS COMBINED WITH ANISOTROPY AND DESTRUCTURATION  

作　　者：Zhen-Yu Yin Minna Karstunen 

机构地区：[1]Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China [2]Department of Civil Engineering, University of Strathclyde, John Anderson Building, 107 Rottenrow, Glasgow G40NG, UK

出　　处：《Acta Mechanica Solida Sinica》2011年第3期216-230,共15页固体力学学报（英文版）

基　　金：sponsored by the Academy of Finland (Grants 210744 and 1284594);the European Community through the program ‘People’ as part of the Industry-Academia Pathways;Partnerships project GEO-INSTALL (PIAP-GA-2009-230638)

摘　　要：The paper aims to investigate modelling the strain-rate-dependency of natural soft clays combined with anisotropy and destructuration using an elasto-viscoplastic model. The model is based on Perzyna＇s overstress theory and the elastoplastic model S-CLAYIS. Tests at constant strain^rate and creep tests under both one-dimensional and triaxial conditions on several clays are simulated. Simulations highlight the loading scenarios in which it is necessary to account for anisotropy and/or destructuration in order to get accurate predictions. Comparisons between the predicted and measured results demonstrate that the proposed model can successfully reproduce the time-dependent behaviour of natural soft clays under different loading conditions.The paper aims to investigate modelling the strain-rate-dependency of natural soft clays combined with anisotropy and destructuration using an elasto-viscoplastic model. The model is based on Perzyna＇s overstress theory and the elastoplastic model S-CLAYIS. Tests at constant strain^rate and creep tests under both one-dimensional and triaxial conditions on several clays are simulated. Simulations highlight the loading scenarios in which it is necessary to account for anisotropy and/or destructuration in order to get accurate predictions. Comparisons between the predicted and measured results demonstrate that the proposed model can successfully reproduce the time-dependent behaviour of natural soft clays under different loading conditions.

关 键 词：anisotropic materials CREEP DEBONDING TIME-DEPENDENT 

分 类 号：TU528.01[建筑科学—建筑技术科学] O343.8[理学—固体力学]