THE INFLUENCE OF LOCKED-IN FABRICATION STRESSES ON STRUCTURAL PERFORMANCE

The potential influence of locked-in fabrication stresses on the ultimate response of structural frames is investigated. The paper demonstrates the influence of locked-in stresses on the test frames and discusses the potential significance for the prediction of the ultimate response of jacket structures with reference to previous findings in the open literature. A principal difficulty is to quantify the influences of scale in the test frames as welds cool and shrink, compared with full scale jacket construction. To elucidate this a unique of measurements of the locked-in strains accumulating during the fabrication of a structure were taken. A mechanical system of strain measurement was used and this and alternative approaches are evaluated. Based on the findings, it is recommended that future frame testing projects include thorough measurements of fabrication stresses to ensure that results are properly interpreted. Furthermore, it may be appropriate to include sensitivity studies (encompassing locked-in fabrication stresses and other realistic factors) in the assessment of the ultimate strength of a jacket structure.

  • Supplemental Notes:
    • OMAE 1995, 14th Intl Conf on Offshore Mechanics & Arctic Engng; 18-22 June 1995; Copenhagen, Denmark. Sponsored by ASME et al. Procs. Publ by ASME, ISBN 0-7918-1307-X. Vol I, Pt B, p 475 [11 p, 10 ref, 4 tab, 9 fig]
  • Authors:
    • Bolt, H M
    • Smith, J K
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00718556
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 27 1996 12:00AM