Compressive Behaviour of Concrete-Filled Elliptical Hollow Sections
Concrete-filled steel tubes are gaining increasing prominence in a variety of engineering structures,with the principal cross-section shapes being square,rectangular and circular hollow sections. A recent addition to this range has been that of elliptical hollow sections.The structural response of empty elliptical tubes has been examined in previous studies. In this paper,the cross-sectional axial behaviour of concrete-filled elliptical hollow sections is investigated. An experimental programme comprising a total of 21 test specimens,with three nominal tube thicknesses (4 mm,5 mm and 6.3 mm) and three concrete grades (C30,C60 and C100) has been performed. The effects of steel tube thickness,concrete strength and constraining factor on elastic stiffness,ductility and ultimate strength were studied. The results of the tests presented herein were combined with those from previous studies and compared with existing design provisions for square,rectangular and circular concrete-filled tubes. The design expressions from current European,North American,Japanese,British and Chinese Standards were assessed. On the basis of the comparisons,design recommendations for concrete-filled elliptical hollow sections have been made.
Composite Compression Concrete-filled steel tubes Confinement Elliptical hollow sections
Hua Yang Leroy Gardner Sumei Zhang
School of Civil Engineering,Harbin Institute of Technology,Harbin,150090 China Department of Civil and Environmental Engineering,Imperial College,London,SW72AZ UK
国际会议
哈尔滨
英文
144-151
2008-10-11（万方平台首次上网日期，不代表论文的发表时间）