Investigation Into Behavior Of Concrete-Filled Double Skin (Ohs Outer And Chs Inner) Steel Tubular Columns Subjected To Axial Compression

Recently, with the concrete-filled steel tubular (CFST) structure used in more and more high-rise buildings and bridges, a new kind of CFST — concrete-filled double skin steel tubular (CFDSST) is studied gradually by some researchers and engineers. Theses members consist of two concentric steel tubes with concrete sandwiched between them. In the past, many studies have been performed on CFDSST members with circular or square sections. However, with the disadvantage of these two kinds of CFDSST, this paper studies the behavior of another kind of CFDSST subjected to axial compression, where outer tube is octagon section and inner tube is circular section, and gets some conclusion which the next studies for this member will be based on.Firstly, the load-strain of every part of the member in detail by...