EVALUATION OF WELD REPAIR OF DENTED MEMBERS

In the operation of offshore structures, it is not uncommon for members to suffer structural damage in the form of dents. These may result from accidental damage during load-out and installation, from impact with supply ships or falling objects, or from other outside forces. This paper describes some of the considerations necessary in performing a fitness-for-purpose evaluation of tubular members that have suffered damage in the form of dents. The compressive strength is evaluated based on methods developed elsewhere. The fatigue behaviour of the dent is evaluated using the results of finite element analyses which model the redistribution of stress due to the dent. Several possible weld repair options are also evaluated, using fracture mechanics principles. If a fitness-for-purpose evaluation is performed for the proposed repair as well, it may be shown that the repair weld can reduce the life of the member below that of the normally life-limiting locations, the tubular joints. In this case, the prudent action would be to leave the dented member intact.

• Supplemental Notes:
  • Proceedings of the 4th International Conference on Behaviour of Offshore Structures, held Delft, The Netherlands, 1-5 July 1985, p. 409 [9 pp., 17 ref., 3 tab., 7 fig., 1 phot.]
• Authors:
  • Grover, J L
  • Egan, G R
• Publication Date: 1985

Language

• English

Subject/Index Terms

• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00689935
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM