DEVELOPMENT OF A STRAIN-SOFTENING TYPE CONCRETE CONSTITUTIVE MODEL AND 3-D FEM ANALYSES FOR CONFINED CONCRETE

Abstract

The authors have developed a strain softening type constitutive model for concrete under compression with relatively low lateral confining pressure. In the present paper, firstly the proposed model has been extended to the model which can predict the softening behavior of concrete under multiaxial stresses in tensile as well as compressive condition, by re-examining the model parameters from several experimental data on concrete. Subsequently, the proposed concrete model has been implemented in the finite element program (FEAP) and 3-D FEM parametric analyses have been performed on the confined concrete.