Experimental Study on Concrete Filled Elliptical Steel Tubular Stub Columns under Compression

Abstract

Concrete filled elliptical steel tubular, abbreviated in CFEST, structure is similar to a concrete filled tubular, so-called CFT structure and a new type of structural member consists of elliptical steel tube and in-filled concrete. Purpose of this study is to investigate centric loading characteristics of CFEST experimentally. Influence of diameter-to-thickness ratio, 2b/t(2a/t), on axially loading capacities of CFEST is mainly discussed. Furthermore, biaxial stress of the elliptical steel tube induced into core concrete is also mentioned. As a result, it can be found that axially loading capacities are affected by the ratio 2b/t(2a/t).