Low-Cycle Fatigue Damage of Circular Concrete-Filled-Tube Columns

摘要: Under seismic actions, the induced damage in critical regions of a concrete-filled steel tube (CFT) column could be attributed to cumulative damage of the steel tube caused by repeated cyclic loading in the post-yield strain range. An experimental study was undertaken to develop an analytical model of cumulative damage for circular CFT columns subjected to cyclic loading. The low-cycle fatigue behavior of CFT columns was investigated and a relationship between fatigue life and normalized displacement amplitude was established …