An anisotropic elastoplastic model for soft clays

被引:403
作者
Wheeler, SJ
Näätänen, A
Karstunen, M
Lojander, M
机构
[1] Univ Glasgow, Dept Civil Engn, Glasgow G12 8LT, Lanark, Scotland
[2] Aalto Univ, Lab Soil Mech & Fdn Engn, FIN-02015 Helsinki, Finland
关键词
anisotropy; constitutive relations; elastoplasticity; laboratory tests; rotational hardening; soft clays;
D O I
10.1139/T02-119
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
An anisotropic elastoplastic model for soft clays is presented. Experimental data from multistage drained triaxial stress path tests on Otaniemi clay from Finland provide support for the proposed shape of the yield curve and for the proposed relationship describing the change of yield curve inclination with plastic straining. Procedures are proposed for determining the initial inclination of the yield curve and the values of the two additional soil constants within the model. Comparisons of model simulations with experimental data demonstrate significant improvements in the performance of the new model over the Modified Cam Clay model. The remaining discrepancies are mainly attributable to the important role of destructuration in the sensitive Otaniemi clay.
引用
收藏
页码:403 / 418
页数:16
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