STUDY ON NUMERICAL SIMULATION TECHNOLOGY OF STEEL REINFORCED CONCRETE STRUCTURES USING ANSYS

Nonlinear finite element analysis of six SRC (steel reinforced concrete)beams using the ANSYS computer program were conducted and the mechanical behaviors of these beams were analyzed. A series of numerical simulation technologies such as defining material model of concrete and steel, establishing global finite element model with discrete reinforced bars elements and stirrups elements, and methods of post-processing of analysis results were studied. Attention was especially paid to numerical simulation of bond-slip behavior on interfaces between shaped-steel and concrete. A three-dimensional link-element composed of three nonlinear spring element named combination-39 element in the ANSYS program was adopted to represent the tri-directional interaction on interfaces between shaped-steel and concrete at different positions. Method of transferring bond-slip constitution relations to force-displacement curves of the combination-39 element and skills of creating the three-dimensional link-element were introduced. Based on the ANSYS computer program, the technology for simulating SRC structures was finally established. The numerical simulation results of six beam specimens were in good agreement with the experimental results conducted before. It shows that the numerical simulation technology presented is feasible and can be applied to further research on mechanical behaviors of SRC structures.