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Civil Engineering Association eBooks Journals, Papers and Presentations Strength of Welded T-Joint Truss

Strength of Welded T-Joint Truss
 yanburak

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#1
09-13-2010, 06:33 AM
Strength of Welded T-Joint Truss

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The report describes laboratory tests of arc welded T-joints between equal width rectangular
hollow sections. The brace and chord members were cold formed with a nominal yield stress
of 350 MPa. The welds were laid using MMAW and GMAW processes without profiling the
brace ends. The brace of each specimen was loaded in tension to failure with the chord
supported continuously so as not to induce significant bending effects.
The test results showed that the joint strength can be improved by using backing strips for the
butt welds, while backing rods (or filler rods) should not be used as they led to larger
variation in joint strengths, and often, inferior strengths. The test strengths are compared with
the design strengths obtained using the IIW Recommendations and Eurocode3, Part 1.8. It is
shown that for cold-formed tubes with a nominal yield stress of 350 MPa (or above), a design
check on the strength of the butt (or groove) weld is required in addition to the checks on the
strengths of the chord and brace members specified in the current design guidelines. An
equation is proposed for calculating the strength of the weld.
Keywords: butt weld, brace-to-chord connection, cold-formed steel, metal arc welding,
rectangular hollow section, T-joint design

28 pages



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 Vladimir

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#2
09-13-2010, 09:36 AM
This is report and many other you can find in this site:

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