Hysteretic Behavior of Q690D High Strength Steel Box Section Beam Columns

Abstract:

In order to study the hysteretic behavior of Q690D high strength steel (HSS) welded box section columns under cyclic loading, experiments and finite element simulations were conducted to study the hysteretic response of box section columns subjected to cyclic loading. From the obtained hysteretic curves and skeleton curves, it is observed that the Q690D HHS welded box section columns show a good energy dissipation capacity and seismic performance. After being verified by comparing with experimental results, the finite element(FE) model was employed to investigate the influence of axial compression ratios, slenderness ratios, width thickness ratios of plate on the hysteretic behavior of Q690D box section columns. It is notices that the second order effect cannot be neglected for Q690D HHS welded box section columns. Finally, hysteretic models for Q690D HSS welded box section columns were proposed based on the results of experimental study and FE analysis, providing the foundation for nonlinear seismic analysis of high strength steel structures. The proposed hysteretic models are demonstrated to be able to accurately predict the hysteretic behavior of Q690D high strength steel column by comparing the experimental and numerical results.