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This paper presents the results of two recent experimental programs (comprising a total of twenty-three large-scale tests) on weld-critical circular hollow section (CHS) connections. The first program involved testing fillet and partial joint penetration (PJP) groove welds in eleven moment-loaded CHS-to-CHS T-connections. The second involved testing PJP welds in axially-loaded transverse plate-to-CHS X-connections. The ultimate strength of the welds (at rupture) and non-uniform strain distributions adjacent to the welds at various load levels were measured, and reliability analyses of new weld effective geometric property provisions in CSA W59(:24) for the design of fillet- and PJP-welded CHS connections were conducted. The results of this study: (1) support the design of welds in CHS connections as “fit-for-purpose” in accordance with CSA W59, and (2) give further credence to the use of the (1.00 + 0.50sin1.5θ) directional strength-increase factor for the design of fillet welds in CHS members.

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Recent Research on Weld Effective Properties for CHS Connections

  • 会议论文

  • 发表日期：

    2025年

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  • Benjamin R. W. Newcomb,
  • Zhiyuan Yang,
  • Kyle Tousignant

摘要

This paper presents the results of two recent experimental programs (comprising a total of twenty-three large-scale tests) on weld-critical circular hollow section (CHS) connections. The first program involved testing fillet and partial joint penetration (PJP) groove welds in eleven moment-loaded CHS-to-CHS T-connections. The second involved testing PJP welds in axially-loaded transverse plate-to-CHS X-connections. The ultimate strength of the welds (at rupture) and non-uniform strain distributions adjacent to the welds at various load levels were measured, and reliability analyses of new weld effective geometric property provisions in CSA W59(:24) for the design of fillet- and PJP-welded CHS connections were conducted. The results of this study: (1) support the design of welds in CHS connections as “fit-for-purpose” in accordance with CSA W59, and (2) give further credence to the use of the (1.00 + 0.50sin1.5θ) directional strength-increase factor for the design of fillet welds in CHS members.