EXPERIMENTAL RESEARCH ON SEISMIC BEHAVIOR OF SPATIAL JOINTS IN A COMPOSITE FRAME CONSISTING OF CFST CRISSCROSS SECTION COLUMNS AND STEEL BEAMS
Three exterior joints in a composite frame consisting of CFST crisscross section columns and steel beams were designed and manufactured.An experimental research on their seismic behavior was performed under lateral cyclic loading.The study investigated joints failure mode,hysteretic behavior,and ductility.Among the joints,M J-S1,M J-S2 were designed according to the principle of strong component,weak node,and M J-S3 was designed based on strong column,weak beam.MJ-S1 and M J-S2 demonstrated similar failure modes.The panel zone yielded first,and the stiffening ring was pulled off.At last tube walls cracked and concrete was crushed.According to strong column,weak beam design principle,a weak-beam specimen yield and fractured,the beam had no obvious hysteretic behavior.The result indicated that the axial load ratio of the column had certain effect on both the strength and ductility of the connections.With the increase of axial compression ratio,the bearing capacity of the joints improved.However,the deformation capacity and ductility were compromised.It can be concluded that the tested connections in the study demonstrate good seismic performance.
Special-shaped section column concrete-filled steel tubular (CFST) spatial joint seismic behavior
Chengxiang Xu Xiaoqiang Liu Jicheng Zhang
School of Urban Construction, Yangtze University, Jingzhou 434023, P.R.China
国际会议
The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)
武汉
英文
370-375
2012-11-17（万方平台首次上网日期，不代表论文的发表时间）