TY - EJOU AU - Tanaka, T. TI - Time Dependent Cyclic Constitutive Model and its Application to Some Geotechnical Problems T2 - The International Conference on Computational \& Experimental Engineering and Sciences PY - 2007 VL - 4 IS - 4 SN - 1933-2815 AB - The viscoplastic constitutive relations with kinematic strain hardening-softening model for geomaterials are developed. The constitutive models include strain-rate dependent properties based on the thoery by Duvaut-Lions. The dynamic relaxation method for static problems and the dynamic analysis for earthquake responses are applied to boundary value problems using finite element methods. KW - DO - 10.3970/icces.2007.004.251