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The behavior of branch-rotated and chord web-stiffened T-joints in Cold-formed Square Hollow Sections  

Park, Keum Sung (한국건설기술연구원)
Bae, Kyu Woong (한국건설기술연구원)
Jeong, Sang Min (한진중공업)
Kang, SeokGyu ((주)상원구조)
Moon, Tae Sup (한양대학교 건축공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.15, no.6, 2003 , pp. 673-681 More about this Journal
Abstract
This paper describes the experiment that determines the ultimate strength of new uniplanar T-joints made of cold-formed square hollow sections. The new T-joint focused on the configuration of a branch member that is oriented 45 degrees to the plane of the truss and welded to the chord member whose web is stiffened with plate. The strength and failure mode are examined using the existing strength formula for the branch-rotated T-joint $(16.7{\leq}2{\gamma}(B/T){\leq}33.3$ and $0.63{\leq}{\beta}(b1/B){\leq}0.7)$. The test result shows that the capacity of the stiffened joint increases with thicker stiffening plate. The failure mode of the specimen $(2{\gamma}=33.3)$ is stiffened with plate changes from M2 (flange failure) to M3 (combined failure). On the other hand, the failure mode of the specimen $(2{\gamma}=16.7)$ is stiffened with plate changes from M1 ( web failure) to M2 (flange failure)
Keywords
chord web-stiffened; stiffening plate width; stiffening plate thickness; the branch-rotated; T-joing; ultimate strength;
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