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The results of an experimental testing programme on 12 weld-critical axially loaded circular hollow section (CHS) X-connections with large branch-to-chord diameter, β-, ratios (i.e. 0.50 < β ≤ 1.00) are presented. Measured load–displacement response, weld fracture load, and strain distributions are used to evaluate the weld-effective length phenomena. A reliability analysis is conducted to assess the level of safety obtained when extending the weld-effective length formulae provided by CSA W59:23 for CHS X-connections with small β-ratios (i.e. 0.10 ≤ β ≤ 0.50) designed as “fit-for-purpose,” and recommendations are made for the further development of Section 4.8 of the standard.

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Extending the Limits of Validity for Welds Designed as “Fit-For-Purpose” in CHS X-Connections

  • 会议论文

  • 发表日期：

    2025年

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  • Benjamin R. W. Newcomb,
  • Pedro A. Dall’Alba,
  • Kyle Tousignant

摘要

The results of an experimental testing programme on 12 weld-critical axially loaded circular hollow section (CHS) X-connections with large branch-to-chord diameter, β-, ratios (i.e. 0.50 < β ≤ 1.00) are presented. Measured load–displacement response, weld fracture load, and strain distributions are used to evaluate the weld-effective length phenomena. A reliability analysis is conducted to assess the level of safety obtained when extending the weld-effective length formulae provided by CSA W59:23 for CHS X-connections with small β-ratios (i.e. 0.10 ≤ β ≤ 0.50) designed as “fit-for-purpose,” and recommendations are made for the further development of Section 4.8 of the standard.