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<p>This paper presents a numerical and experimental investigation of the ultimate capacity of X-shaped circular hollow section (CHS) steel joints, when the brace members are submitted to axial compression. Three joints are manufactured and tested, one intact and the other two with symmetrical central circular perforation damage in the chord. The results obtained from the numerical and experimental simulations proved to be consistent in terms of the axial load versus displacement curve and strains measured in 5 locations in the chord. It was observed that the damage reduces the tubular joint strength and the greater the damage the lower the joint load bearing capacity. The results obtained from the experimental test and numerical model are compared with the intact joint strength equations proposed by CIDECT design guide and Eurocode 3 and show the conservatism of the design standards.</p>

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Experimental and numerical study of the ultimate capacity of intact and damaged steel CHS X-joints submitted to compressive loads

  • 期刊论文

  • 发表日期：

    2025年1月3日

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  • J. C. Coelho,
  • J. C. R. Cyrino,
  • M. A. Vaz,
  • G. G. de Paula

摘要

This paper presents a numerical and experimental investigation of the ultimate capacity of X-shaped circular hollow section (CHS) steel joints, when the brace members are submitted to axial compression. Three joints are manufactured and tested, one intact and the other two with symmetrical central circular perforation damage in the chord. The results obtained from the numerical and experimental simulations proved to be consistent in terms of the axial load versus displacement curve and strains measured in 5 locations in the chord. It was observed that the damage reduces the tubular joint strength and the greater the damage the lower the joint load bearing capacity. The results obtained from the experimental test and numerical model are compared with the intact joint strength equations proposed by CIDECT design guide and Eurocode 3 and show the conservatism of the design standards.