Experimental Behaviour of Axially Loaded Hollow Steel Columns In-filled with Concrete

摘要

This paper is based on the experimental study of twelve steel tubular columns of circular section filled with plain, fibre reinforced and partial replacement of coarse aggregate by rubber, granite, and construction and demolition (C&D) debris concre te. The specimens were tested under axial compression to investigate the effects of fibre, rubber, granite and C&D debris concrete on the strength and structural beha viour of composite columns. Hollow steel columns of similar specimen were also tested as reference columns. The test results were illustrated by load-deflection curves. Various characteristics, such as, strength, stiffness, ductility and failure mode are discussed. Interpretation of the experimental results indicates that the use of fibre reinforced, rubber, granite and C&D debris concrete as infill material has a considerable effect on the strength and behaviour of composite columns.