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Title

A STRAIN HARDENING/SOFTENING ELASTO-PLASTIC CONSTITUTIVE MODEL FOR PLASTIC CONCRETE MATERIALS

Pages

 Start Page 79 | End Page 91

Abstract

 In this research, the behavior of PLASTIC CONCRETE materials with a strain Hardening/Softening ELASTO-PLASTIC CONSTITUTIVE MODEL are investigated using FLAC software based on a series of drained triaxial test results. The constitutive model is based on the mobilized strength (friction and cohesion) and mobilized dilatation angle concepts. The results indicate that the assumed functions of modified mobilized friction angle and mobilized cohesion (The Yield function of the model) which are common for geotechnical materials, can predict stress-strain behavior with a sufficient accuracy. However, they cannot simulates the Volume changes due to dilation effects accurately, especially for PLASTIC CONCRETE with a relatively high stiffness and strength. Therefore, the potential function of the model is modified. The stress-strain and Volume strains that have been obtained from the modified model are in good agreement with the experimental data, especially for soft PLASTIC CONCRETE, as well as for hard PLASTIC CONCRETE in a low confining pressure.

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