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Plastic Mechanism Analysis of Welded Thin-Walled T-joints made up of Circular Braces and Square Chords under In-Plane Bending


Mashiri, FR and Zhao, XL, Plastic Mechanism Analysis of Welded Thin-Walled T-joints made up of Circular Braces and Square Chords under In-Plane Bending, Thin-Walled Structures, 42, (5) pp. 759-783. ISSN 0263-8231 (2004) [Refereed Article]

DOI: doi:10.1016/j.tws.2003.12.010


Welded thin-walled T-joints made up of circular hollow section (CHS) braces and square hollow section (SHS) chords were tested under static in-plane bending load. The hollow sections are cold-formed and have thicknesses less than 4 mm. The CHS-SHS T-joints are used in building the undercarriages and structural supports of equipment and structural systems used in the road transport and agricultural industries. Failure in the CHS-SHS T-joints was observed to occur as a result of chord-face yielding. Chord cracking was also observed after large deformations, resulting in a peak load being attained in these joints. There is no design formula in the existing CIDECT design guides, IIW static recommendation and Eurocode 3 for CHS-SHS T-joints under in-plane bending. In this paper, load versus chord flange indentation graphs, for the CHS-SHS T-joints are used to determine the deformation limit that defines the ultimate strength of the joints. The deformed shape of the chord observed from experimental tests is used to create a yield line model. The weld size and the rounded corners of the SHS chord are considered in the model. A formula is derived, for the ultimate strength of the CHS brace and SHS chord vierendeel connections based on a plastic mechanism analysis using yield line theory. There is a reasonably good agreement between the ultimate strength predicted using this formula and that determined experimentally. © 2003 Elsevier Ltd. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Engineering
Research Group:Civil engineering
Research Field:Structural engineering
Objective Division:Construction
Objective Group:Construction materials performance and processes
Objective Field:Metals
UTAS Author:Mashiri, FR (Dr Fidelis Mashiri)
ID Code:45282
Year Published:2004
Web of Science® Times Cited:19
Deposited By:Engineering
Deposited On:2007-07-09
Last Modified:2007-07-09

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