BEHAVIOR AND STRENGTH OF SQUARE STEEL TUBE COLUMNS FILLED WITH STEEL-REINFORCED SELF-COMPACTING HIGH-STRENGTH CONCRETE
The square steel tube columns filled with steel-reinforced self-compacting high-strength concrete is a new combination of steel-concrete composite columns.In this type of composite columns,section steel is inserted into square steel tube and self-compacting high-strength concrete is filled into the tube.To investigate the behavior of the composite columns,fourteen short composite column specimens were tested under axial compression.The main parameters were the concrete strength,the width-to-thickness ratio and the section steel ratio.The experimental results indicate that the composite columns have very high strength and good ductility because of the interaction between the square steel tube,self-compacting high-strength concrete and section steel; the behavior of self-compacting columns and vibrated columns is almost the same; the concrete strength,the width-to-thickness ratio and the section steel ratio have significant effects on behavior and strength of the composite columns.A formula is proposed to calculate the ultimate strength of the composite columns under axial load.The calculated values agree well with the experimental results.
Meichun Zhu Qingxiang Wang Xiufeng Feng
State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,China
国际会议
长沙
英文
673-679
2005-05-26（万方平台首次上网日期，不代表论文的发表时间）