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<p>The loss of structural integrity of steel structures may occur to different effects, e.g. brittle fracture, fatigue, corrosion and others. The most dangerous is brittle fracture because it may occur without prior warning. To ensure the structural integrity of components, experience has been evaluated and analytical methods were developed. Empirical methods are very much confined to the type of structure and loading in consideration, whereas the analytical ones can be applied to newly arising issues. The analytical SINTAP method was developed and the Eurocode method is a direct application of it. There is an IIW Recommendation for Assessment of Risk of Fracture under seismic load. Both methods have been joined in order to assess the structural integrity of structural components consisting of spiral (helical) welded API 5L pipes. Application examples of structural details show that API steels X52 PSL2 N and M can be used at specified lowest service temperatures and structural details.</p>

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Fracture behaviour of a spiral weld in the welded API5L structural column under seismic load - an application of existing codes and recommendations

  • 期刊论文

  • 发表日期：

    2026年1月19日

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  • A. F. Hobbacher,
  • M. Karpenko,
  • A. Fussell

摘要

The loss of structural integrity of steel structures may occur to different effects, e.g. brittle fracture, fatigue, corrosion and others. The most dangerous is brittle fracture because it may occur without prior warning. To ensure the structural integrity of components, experience has been evaluated and analytical methods were developed. Empirical methods are very much confined to the type of structure and loading in consideration, whereas the analytical ones can be applied to newly arising issues. The analytical SINTAP method was developed and the Eurocode method is a direct application of it. There is an IIW Recommendation for Assessment of Risk of Fracture under seismic load. Both methods have been joined in order to assess the structural integrity of structural components consisting of spiral (helical) welded API 5L pipes. Application examples of structural details show that API steels X52 PSL2 N and M can be used at specified lowest service temperatures and structural details.