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Title: Effects of boundary conditions and chord stresses on static strength of thick-walled CHS K-joints
Authors: Choo, Y.S. 
Qian, X.D. 
Wardenier, J.
Keywords: Chord stresses
Circular hollow section (CHS)
Finite element analysis
Joint strength
Thick-walled joint
Tubular structure
Issue Date: Apr-2006
Citation: Choo, Y.S., Qian, X.D., Wardenier, J. (2006-04). Effects of boundary conditions and chord stresses on static strength of thick-walled CHS K-joints. Journal of Constructional Steel Research 62 (4) : 316-328. ScholarBank@NUS Repository.
Abstract: This paper presents results from a systematic investigation on the static strength of thick-walled circular hollow section (CHS) K-joints with various boundary constraints and chord axial stresses. The effects of boundary conditions appear to be critical if the boundary constraints alter the chord stress level. A K-joint with unconstrained brace ends is observed to indicate a rapid decrease in the post-peak joint strength. For a joint with members (brace and chord) of sufficient length, the member end fixities impose marginal effects on the joint strength. It is found that displacement-controlled loads on an isolated K-joint provide a realistic representation of the load distribution of a K-joint within a tubular frame. A definition in terms of maximum chord stress ratio for a new chord stress function for K-joints is found to minimize the scatter with respect to variations in the joint geometry. © 2005 Elsevier Ltd. All rights reserved.
Source Title: Journal of Constructional Steel Research
ISSN: 0143974X
DOI: 10.1016/j.jcsr.2005.08.001
Appears in Collections:Staff Publications

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