CYCLIC BEHAVIOR OF STEEL BEAM TO CONCRETE-FILLED STEEL TUBULAR SHS COLUMN COMPOSITE FRAMES
This paper describes six composite frame tests carried out on steel beam to concrete filled steel tubular (CFST) columns with square hollow sections (SHS) using external ring. The frame specimens were tested under a constant axial load and a cyclically increasing lateral load. Each test frame specimen consisted of two CFST columns and a steel beam segments to represent an interior frame in a building. The test parameters included the axial load level and the beam to column linear stiffness ratio. This paper presents an analysis of the experimental results to evaluate the influences of different testing parameters on various characteristics of the composite frame performance. The test results show that the lateral load versus lateral displacement hysteretic curves of the composite frame were plump shuttle shape. The curves have no obvious strength deterioration and stiffness degradation. It was found that the composite frames exhibited high levels of energy dissipation and ductility. The initial lateral rigidity and the equivalent damping coefficient of the frame was almost unchanged within the current limitation of axial load level. The axial load level of columns have a evident effect for the strength and seismic behavior of the frames, and with increase of axial load level of columns, the lateral ultimate strength of the frames become low, and the ductility and the capacity of energy dissipation also become descending.
Concrete filled steel tubular (CFST) column Beam Frame Concrete Failure mode Seismic behavior Ductility Energy dissipation
Wenda Wang Linhai Han
Tsinghua University, China
国际会议
The 9th International Conference on Steel Space & Composite Structures(第九届国际钢材、空间结构、组合结构会议)
烟台·北京
英文
633-639
2007-10-10（万方平台首次上网日期，不代表论文的发表时间）