A Comparative Study of the Design Basis for Complex Tubular Joints

Siu Yung Alan Ma, I.E. Tebbett, J.V. Sharp

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


    This paper describes a comparative study of the design basis for ring-stiffened, cast steel and internal grouted tubular joints. The current levels of knowledge, design code provisions and future development requirements for these complex joints are identified. Considerations are given to structural performance, fabrication, in-service inspection, the level of confidence in design and the long term behavior of different joint types. Results indicate that the behavior of the complex joints is radically different from that of the simple unstiffened welded joints. Anomalies in the existing design guidance for complex joints, which has been developed primarily from experience gained from simple joints, are identified.

    Tubular joints design has been a subject of considerable interest. Enhancement schemes are often introduced to meet functional requirements or as a means of saving materials and construction costs of platforms. Despite the fact that complex joints have been installed on many offshore structures, design codes provide little guidance for these joints. The results of this study should greatly assist in the development of rational design and inspection procedures for complex joints in offshore use. This paper also provides valuable information to assist designers either in the selection of the appropriate scheme for the design of new platforms or in reassessment of existing structures which were installed with one of the enhancement techniques.

    Original languageEnglish
    Title of host publicationOffshore Technology Conference, Houston, Texas,
    Place of PublicationHouston, Texas, USA
    Publication statusPublished (VoR) - 1 May 1989


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