Paper Information

Journal:   JOURNAL OF CIVIL ENGINEERING (JOURNAL OF SCHOOL OF ENGINEERING)   FALL 2017 , Volume 30 , Number 1 (19) #L0048; Page(s) 79 To 91.
 
Paper:  A STRAIN HARDENING/SOFTENING ELASTO-PLASTIC CONSTITUTIVE MODEL FOR PLASTIC CONCRETE MATERIALS
 
Author(s):  MEHMANDOUST KOTLAR M., AKHTARPOUR A.*, SALARI M.
 
* FERDOWSI UNIVERSITY OF MASHHAD
 
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.

 
Keyword(s): ELASTO-PLASTIC CONSTITUTIVE MODEL, PLASTIC CONCRETE, STRAIN HARDENING-SOFTENING, TRIAXIAL TESTS
 
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