In order to investigate the seismic performance of giant CFRT columns with load transfer details, the finite element software ABAQUS was utilized to conduct a finite element analysis based on the experimental results. It shows that the finite element analysis results, in terms of p-A curves and failure modes, agree well with the experimental results. Furthermore, a parametric analysis by ABAQUS was conducted. Different parameters including the slenderness ratio, width to thickness ratio of steel tube, axial compression ratio and the T-shaped longitudinal stiffeners were considered in the parametric analysis. It is shown that seismic behavior is mainly influenced by axial compression ratio and width to thickness ratio. The ductility index decreases with the increase of width to thickness ratio . The ductility index decreases with the increase of axial compression ratio. The ductility performance is improved after T- shaped stiffener is used. Finally, the stress distribution of load transfer details was analyzed. It can be concluded from the numerical stress analysis results that the details combining distributive beam with inner diaphragm can ensure the interactive performance of CFRT columns under reversed cyclic load.
Journal of Building Structures