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Analysis of dented tubular members using moment curvature approach
Abstract Tubular members are used extensively in offshore structures, which are installed to facilitate offshore oil and gas production. Member damage, in the form of dents, can be caused by supply workboat collisions, dropped heavy objects, and minor mishaps during offshore structure construction, loadout or installation. To avoid costly repair and construction delay, a fitness-for-purpose evaluation may be performed to ascertain whether a repair is necessary. The ultimate strength, and sometimes the pre- and post-ultimate strength behavior, of a dented member may be required to conduct the fitness-for-purpose evaluation. A moment-thrust-curvature (MPΦ) approach for calculating the behavior and ultimate strength of dented tubular members is presented. A new set of MPΦ expressions for dented or undented tubular members, presented previously by the authors, is used. A computer program, BCDENT, was developed, whose capabilities include analysis of single or multiple-dent tubular members subjected to axial compression, end bending moments, and laterally distributed and concentrated loads. In order to capture accurately the tubular member behavior for the multiple-dent and biaxial bending cases, BCDENT employs a three-dimensional beam-column analytical method. In this paper, the validity and accuracy of the MPΦ approach for the behavior analysis of dented tubular members are verified by comparing BCDENT predictions to existing test results from several references.
Analysis of dented tubular members using moment curvature approach
Abstract Tubular members are used extensively in offshore structures, which are installed to facilitate offshore oil and gas production. Member damage, in the form of dents, can be caused by supply workboat collisions, dropped heavy objects, and minor mishaps during offshore structure construction, loadout or installation. To avoid costly repair and construction delay, a fitness-for-purpose evaluation may be performed to ascertain whether a repair is necessary. The ultimate strength, and sometimes the pre- and post-ultimate strength behavior, of a dented member may be required to conduct the fitness-for-purpose evaluation. A moment-thrust-curvature (MPΦ) approach for calculating the behavior and ultimate strength of dented tubular members is presented. A new set of MPΦ expressions for dented or undented tubular members, presented previously by the authors, is used. A computer program, BCDENT, was developed, whose capabilities include analysis of single or multiple-dent tubular members subjected to axial compression, end bending moments, and laterally distributed and concentrated loads. In order to capture accurately the tubular member behavior for the multiple-dent and biaxial bending cases, BCDENT employs a three-dimensional beam-column analytical method. In this paper, the validity and accuracy of the MPΦ approach for the behavior analysis of dented tubular members are verified by comparing BCDENT predictions to existing test results from several references.
Analysis of dented tubular members using moment curvature approach
Duan, L. (author) / Chen, W.F. (author) / Loh, J.T. (author)
Thin-Walled Structures ; 15 ; 15-41
1992-04-03
27 pages
Article (Journal)
Electronic Resource
English
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