RESIDUAL STRENGTH AND EPOXY-BASED GROUT REPAIR OF CORRODED OFFSHORE TUBULARS

An analytical and experimental study is presented on the topic of patch-corroded steel platform tubulars. Short steel tubular specimens were inflicted with simulated patch-type corrosion by grinding an area of the surface to a specified width, height, and reduced wall thickness. The specimens were tested under concentric axial load in order to determine their strength and load- deformation response. The effect of the size and severity of the corrosion patch was examined by testing several specimens of various diameter-to-thickness ratios. It was found that the patch corrosion caused a local buckle to form, leading to a reduced strength as compared to the strength of a non-corroded member. The results from the experimental program were used to verify a nonlinear finite element model. An extensive parametric finite element study was then performed using this calibrated model in order to provide relationships between the residual strength of a patch-corroded specimen and the geometry of the corrosion patch. These relationships were then used to derive a closed-form solution for patch-corroded tubular member strength as a function of diameter-to-thickness ratio and corrosion patch geometry. Good agreement is demonstrated between the closed-form solution, experimental, and nonlinear finite element analyses.

  • Supplemental Notes:
    • BOSS '94, 7th Intl Conf on the Behaviour of Offshore Structures; 12-15 July 1994; Massachusetts, USA. Procs. Publ by Pergamon, ISBN 0 08 041915 1. Vol 3, p 307 [15 p, 12 fig, 2 tab, 15 fig]
  • Authors:
    • Ricles, J M
    • Hebor, M F
  • Publication Date: 1994

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717078
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM