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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
Citation
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
Abstract
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 |
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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 |
Downloads: | 0 |
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