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Summary

The inclination angle significantly impacts the load-bearing capacity of squared hollow section joints, with a 46% reduction observed between the steepest and most obtuse angles. Squared profiles offer higher joint strength compared to circular ones.

Keywords:
constructionhollow sectionsnumerical simulationsteelwelding line

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Area of Science:

  • Structural Engineering
  • Materials Science

Background:

  • Squared hollow steel profiles are vital in offshore and facade construction.
  • Welded joints in these profiles exhibit reduced resistance due to geometric and stress complexities.
  • Current standards inadequately address full-overlapped, on-top joints with squared hollow sections.

Purpose of the Study:

  • To investigate the influence of inclination angles on the resistance of full-overlapped squared hollow section joints.
  • To compare the load-bearing capacity of squared versus circular hollow section joints.

Main Methods:

  • Experimental and numerical studies were conducted.
  • Analysis focused on four common inclination angles for squared hollow section joints.
  • Comparative analysis included squared and circular profiles of similar thickness.

Main Results:

  • A 46% decrease in load-bearing capacity was observed between the steepest and most obtuse inclination angles.
  • Joint behavior is non-linear and angle-dependent.
  • Squared hollow section joints demonstrated superior bearing capacity over circular profiles.

Conclusions:

  • Inclination angle is a critical factor affecting the structural integrity of these joints.
  • Squared hollow sections provide enhanced joint performance compared to circular ones.
  • Further research and standardization are needed for these specific joint configurations.