Experimental Study on Member-Axial Stress-Strain Relationship of Concrete-Filled Steel Members Subjected to Compression, Bending and Torsion

Abstract

It is important to investigate the structural behavior of concrete-filled steel members with transverse constraint up to and in the vicinity of the ultimate state for evaluating the strength and ductility of these members. For this purpose, the structural behavior and the ultimate strength and ductility of both concrete-filled steel box members subjected to compression and bending and concrete-filled steel box and circular members subject to torsion are investigated experimentally. The influence of the lateral constraint on the constitutive behavior of encased concrete and on the strength and ductility of the concrete-filled members with transverse constraint is verified.