SEISMIC BEHAVIOR OF MOMENT CONNECTIONS FOR CONCRETE- FILLED SQUARE STEEL TUBE EDGE COLUMN
A total of three interior diaphragm connections which have only three of the edges welded to the tubes for concrete filled square steel tube with different axial load ratios had been tested under low-cyclic reversed loading at the end of column to investigate the failure modes, ductility, energy dissipation behavior. The experimental results demonstrated that the vertical force on the side of the interior diaphragm welded to the column flange was about one third of that on the other side. When the displacement of the top of column was approximate 70mm, the local buckling of the beam flanges occurred where the interior diaphragm was welded to the column flanges. The results indicated that all specimens had very good ductility and energy dissipation capacity. The story angle drift ductility ratios are μ=3.40～3.45, the elastic and elasto-plastic story angular drift are φy=0.0075~0.0083rad and φu=0.0279~0.0286rad respectively, and the equivalent viscous damping coefficients are he=0.426~0.462, which met the requirements of the current code for seismic design of buildings. The interior diaphragm connection, which has only three of the edges welded to the tubes, can be used for edge column connections.
concrete-filled steel square tube edge column interior diaphragm connection ezperimental study seismic behavior
Xian-Tie Wang Ji-Ping Hao You-Su-Fu Ma
School of Civil Engineering, Xian University of Architecture & Technology, Xian 710055, P.R. China
国际会议
广州
英文
1385-1390
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）