Second Development of Hardening Soil Constitutive Model in FLAC3D

 

Zhao-hua Jiang

School of Civil Engineering, Chongqing University and Key Laboratory of New Technology for Construction of Cities in Mountain Area(Chongqing University), Ministry of Education, Chongqing, China
e-mail: jzhyantu@163.com

Yong-xing Zhang

School of Civil Engineering, Chongqing University and Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing, China
e-mail: cqyxzhang@163.com

 

 ABSTRACT

The shear and compression hardening are contained in the hardening soil model. FLAC3D is numerical analysis software which has strong nonlinear calculating function. If the hardening soil model can be integrated in FLAC3D, many complex problems in the geotechnical engineering will be settled well. According to the Lagrange finite difference method, the incremental and iterative calculation format of the hardening soil model is derived in detail. The updated stress algorithm of shear yield surface is given. Based on the secondary development program provided by FLAC3D, VC++ programming language is used to realize the calculation process and compile into dynamic-link library files which is loaded and invoked. Finally, the model calculation results are compared with soil measured test results to prove the correctness and reasonableness of the secondary development program.

Keywords: hardening soil model; Lagrange finite difference; Elastoplastic analysis; FLAC3D ; further development

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