2010•Chinese Journal of Geotechnical EngineeringRequires access
Combined tension-compression triaxial tests and extended Duncan-Chang model of compacted clay
Yan Zhang, Bingyin Zhang, Guangxin Li, Xun Sun
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Abstract
The conventional triaxial tests,triaxial tension(extension) tests and combined compression-tension triaxial tests on core clay materials of Nuozhadu and Shuangjiangkou earth-rockfill dams are carried out by using the developed horizontal triaxial tension-compression apparatus.Based on the test results,the stress-strain behaviors of compacted clay under triaxial compression,triaxial tension and compression-to-tension states are investigated.Furthermore,the applicability of Duncan-Chang’s EB constitutive model is extended,so that it can be used to describe the deformation properties of compacted clay from compression state to tension one.This extended Duncan-Chang model can be used for numerical simulation of tensile crack propagation in soil structure.