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http://dx.doi.org/10.5659/JAIK.2022.38.2.169

An Experimental Study on Concrete-Filled Double-Skin Square Steel Tubular Beams under a Concentrated Load  

Lee, Seung-Jo (Dept. of Architectural Engineering, Chosun College of Science & Technology)
Publication Information
Journal of the Architectural Institute of Korea / v.38, no.2, 2022 , pp. 169-176 More about this Journal
Abstract
This study aims to examine the effect of shape memory alloys (SMA) wire and the structural performance of rebar on concrete-filled double-skin square steel tubular (CFDST) beams through a bending test. In accordance with ASTM C348, the bending test specimens were fabricated and used to analyze its load-central deflection, failure modes, ultimate load ratio, bending-shear strength, and displacement ductility. Three main parameters were selected: the inside-to-outside breadth ratio, installing SMA and rebar in the inner-to-outer steel tube, and the location of installing SMA and rebar. This experiment revealed that the bending-shear strength gradually decreased as inside-to-outside breadth ratio increased. The calculated bending-shear strength of CFDST under a concentrated load was evaluated using revised equations and the results were compared.
Keywords
Concrete-filled Double Skin Square Steel Tubular Beams; Inside-outside Breadth Ratio; Displacement Ductility; Bending-shear Strength;
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