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Report of a Workshop on Requalification of Tubular Steel Joints in Offshore Structures. September 5-6, 1995. Houston, Texas.


pdf icon Report of a Workshop on Requalification of Tubular Steel Joints in Offshore Structures. September 5-6, 1995. Houston, Texas. (4313 K)
Taylor, A. W.

NISTIR 5877; 100 p. June 1996.

Sponsor:

Minerals Management Service, Herndon, VA

Available from:

National Technical Information Service
Order number: PB96-210760

Keywords:

steel joints; offshore platforms; systems engineering; tubular joints

Abstract:

This report is a summary of a workshop titled "Requalification of tubular Steel Joints in Offshore Structures," held September 5 and 6, 1995 in Houston, Texas. the workshop was sponsored by the U.S. Minerals Management Service, and the National Institute of Standards and Technology. This report contains the papers presented at the workshop, a summary of the workshop discussions, and the conclusions reached by the workshop participants. The major issues discussed at the workshop included tubular joint characterization, computational methods, tubular joint failure definition/condition, condition assessment, and code requirements/technology transfer. Needed technology developments included the following: improved methods for describing analytically the monotonic and cyclic behavior of joints, possibly through joint macro-models; improved methods for predicting the tensile fracture failure mode of joints; a coordinated effort to assess the body of available experimental data on tubular joints; investigation of elastic-plastic fracture mechanics applications to joints; cost/benefit studies prior to development of new analytical tools; a survey to determine the most important failure modes of joints; development of probabilistic approaches to condition assessment of joints; methods for characterizing the condition of new joints; improved methods for detecting flaws in existing joints; studies of the necessary scope and frequency of inspections of joints; improved code provisions for rating the ultimate strength of joints; improved code provisions for the use of actual steel strengths in evaluating existing joints; code provisions for evaluation of damaged joints; a definitive study of can lengths in K-joints; improved classification schemes for joints in terms of the ovalizing parameter a; and methods of incorporating fracture mechanics into code provisions.