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An Experimental Study on the Bond Strengths for Concrete Filled Steel Tube Columns using a Push-Out Test  

Woo, Hae Sung (포항산업과학연구원)
Kim, Jin Ho (포항산업과학기술연구원)
Choi, Sung Mo (서울시립대학교 건축공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.14, no.4, 2002 , pp. 481-487 More about this Journal
Abstract
Currently, the load transfer's mechanism from a beam to a column has yet to ve clarified in a concrete filled steel tubular (CFT) structure with a connection type of an exterior diaphragm. The loads for each floor are transferred to the concrete core from a steel beam through ha contacted face between an in-filled concrete and the interior surface of a steel tube. Thus, a Push-Out test was performed to investigate the load transfer mechanism. A total of 30 samples were tested to confirm the bond stress and/or axial load distribution between a steel tube and in-filled concrete for CFT column. The main parameters considered for this study included concrete type, steel tube-shape/length, and the effect of a weld joint wit ha backing strip for a column splice. Test results were summarized to confirm load transfer behavior between a concrete and steel tube for each experimental parameter, using the analytical approach to verify experimental results.
Keywords
CFT Column; Bond Strength; Concrete Type; Shape and Length of Tube; Thickness of Backing-Strip;
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