Study On The Secondary Development Program Of Bond Model 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 commonly used finite element program is embedded in the element which can simulate the bond slip of reinforced concrete approximately,but the research on the element which is more accurate to simulate this problem needs to be further studied.Therefore,based on ANSYS secondary development,it is of great significance to study the algorithm and program of Drucker-Prager constitutive model and the algorithm of bond-slip between reinforcement and concrete.The main works are as follows:(1)Considering the damage of concrete and 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 concrete cube model and shear wall element model to verify the correctness of the program.(2)Study the algorithm of bond-slip between reinforcement and concrete,and using FORTRAN language to write quadrilateral sliding element program,by calling the concrete constitutive model with damage of D-P program,and comes up with ANSYS D-P model calculation results to verify the effectiveness of the program.(3)Establish the pull-out model of reinforcement and concrete,and calling theconcrete constitutive model with damage of D-P program and quadrilateral sliding element program.By compiling and linking this two programs,the model analysis results and the test results are compared to verify the feasibility of the program.(4)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 bond-slip model between reinforcement and concrete,and to realize the program based on ANSYS secondary development platform.