STUDY ON SEISMIC BEHAVIOR OF CONCRETE-FILLED RECTANGULAR STEEL TUBULAR COLUMNS UNDER CYCLIC LOADING

摘要

An investigation of the seismic behavior of six RCFT column specimens subjected to constant axial loading and cyclic horizontal loading is reported. Properties of these columns, such as their bearing capacity, stiffness degradation, the shape of hysteretic loop, and energy-dissipation characteristics have been studied. At the same time, the effects of various parameters including slenderness ratio, steel ratio, ratio of axial compression stress to strength, have also been studied. The results show that the RCFT columns have good load-displacement hysteretic behavior, ductility and energy-dissipation characteristics.