Post-Peak Cyclic Behavior and Ductility of Reinforced Concrete Columns
This study aims to bring into information some important aspects of the inelastic cyclic response of reinforced concrete columns. Here, the behavior of reinforced concrete columns under lateral cyclic loading is studied using a threedimensional finite element analysis program. It consists of path dependent and nonlinear constitutive models representing the stress-strain relationships of the constituent materials. Inelastic material behaviors, such as cover concrete spalling and large lateral deformation of buckled reinforcement, which influence the post-peak inelastic response of RC columns, are modeled and included in the material models. Some experiments conducted by the authors and other researchers are adopted for the verification and discussion of the analytical results. Reasonable agreement between the analytical prediction and the experimental result is observed. In addition, importance of cover concrete spalling and reinforcement buckling is realized and their contribution to the overall post-peak response is assessed. A reinforced concrete column subjected to ground acceleration is analyzed and the seismic response of the column is also discussed.