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Sensitivity analysis in geotechnical backanalysis of elasto plastic soils

Fan Yiqun Li Xikui (Research institute of engineering mechanics Dalian univesity of technology,Dalian 116023,P.R.China)  
The study on geotechnical backanalysis has long been recogonized as an important subject in the safty analysis of the underground structure construction. Sensitivity analysis for displacements against elasto plastic parameters takes a crucial role in the study.In this paper, the Drucker Prager constitutive model is used to simulate the nonlinear mechanical behavior of soils. With introduction of the natural coordinates into the stress space, the hydrostatic and deviatoric stresses are separated each other and the sensitivity formulations are then derived in a close form.
【Fund】: 国家“重大土木及水利工程安全性与耐久性的基础研究”资助项目
【CateGory Index】: TU411
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