Study On The Secondary Development Program Of Concrete Constitutive Model With Damage Based On ANSYS

The complex stress characteristics must be considered in the nonlinear finite element analysis of concrete structures, therefore, the concrete constitutive relationship has a great influence on the nonlinear analysis of reinforced concrete structures. At present, the finite element software has already embedded concrete constitutive model, but its finite element program is still to be further studied. Drucker-Prager model is widely used in concrete and rock materials. Therefore, based on ANSYS secondary development, it is of great significance to study the algorithm and program of Drucker-Prager constitutive model. Main works are as follows:(1) Study the algorithm of the constitutive relationship model under the surface of concrete D-P, and using FORTRAN language to write the three-dimensional state of the concrete constitutive model of D-P program.By compiling and linking the program, using concrete cube model to verify the correctness of the program, and comes up with ANSYS D-P model calculation results to verify the effectiveness of the program.(2) With damage of concrete considered, using FORTRAN language to write the three-dimensional state of the concrete constitutive model with damage of D-P program. By compiling and linking the program, using the shear wall element model to verify the correctness of the program.(3) Research on ANSYS secondary development platform, and the ANSYS15.0 is matched with Visual Studio Microsoft 2010 and Visual Fortran Composer Intel 2011.And set the environment variable, through the compiler connection to achieve the program.This paper shows that, it is of great practical significance for the finite element software to research the constitutive model of concrete D-P, and to realize the program based on ANSYS secondary development platform.