Fatigue Behavior of Internally Ring-Stiffened Welded Steel Tubular Joints
Publication: Journal of Structural Engineering
Volume 126, Issue 7
Abstract
The use of internal ring stiffeners in offshore steel jacket platforms is a subject of controversy because of their peculiar failure pattern, observed in several tests in the early 1980s. It is estimated that at least 2,000 internally ring-stiffened steel tubular joints are in service in the North Sea. Despite the fact that internal ring stiffeners have been introduced in many offshore platforms, none of the design codes provide quantitative design guidance. Therefore, to create an extensive database on internally ring-stiffened steel tubular joints, experimental investigations were conducted at the Structural Engineering Research Centre, in Chennai, India, on the fatigue behavior of internally ring-stiffened steel tubular joints. Various loading conditions, joint geometries, and environments were considered. In this paper, the experimental results are compared with API and DEn design curves and the results are discussed.
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References
1.
ASTM. (1990). “Standard specification for substitute ocean water.” ASTM D1141, West Conshohocken, Pa.
2.
Bureau of Indian Standards (BIS). ( 1975). “Specification for Structural Steel (Standard Quality).” IS 226, New Delhi, India.
3.
Gurney, T. R. (1982). “The basis of the revised fatigue design rules in the Department of Energy Offshore Guidance Notes.” Proc. 2nd Int. Conf. on Offshore Welded Struct., The Welding Institute, Cambridge, U.K., P55.1–P55.11.
4.
Ma, S. Y. A., Sharp, J. V., and Tebett, I. E. (1989). “A comparative study of the design basis for complex tubular joints.” Proc. 21st Offshore Technol. Conf., Offshore Technology Conference Inc., Houston, Texas, 411–426.
5.
Madhava Rao, A. G., Ramachandra Murthy, D. S., and Gandhi, P. (1990). “Investigations on static and fatigue strength of stiffened steel tubular joints used in offshore structures.” Final Rep. Proj. No. SP-013-5, Institute of Engineering and Ocean Technology, Oil and Natural Gas Commission, Panvel, Bombay, Structural Engineering Research Centre, Madras, India.
6.
Madhava Rao, A. G. et al. (1994). “Studies on corrosion fatigue around weldments of stiffened steel tubular nodes of offshore jacket structures.” Final Rep. Proj. No. S-022, Institute of Engineering and Ocean Technology, Oil and Natural Gas Commission, Panvel, Bombay, Structural Engineering Research Centre, Madras, India.
7.
Nataraja, R., Loader, D. J., Sharp, J. V., and Nichols, N. W. (1992). “Design implications for proposed new fatigue guidance for tubular joints: Case studies.” Proc. 6th Int. Conf. on the Behaviour of Offshore Struct. (BOSS 92), M. H. Patel and R. Gibbins, eds., BPP Technical Services Ltd., London.
8.
“Offshore installations: Guidance on design, construction and certification.” (1990). Department of Energy, 4th ed., Her Majesty's Stationery Office, London, U.K.
9.
“Properties and selection: Irons and steels.” (1978). ASM metals handbook, American Society for Metals, Materials Park, Ohio.
10.
“Recommended practice for planning, designing and constructing fixed offshore platforms—working stress design.” (1993). API RP2A-WSD, 20th ed., American Petroleum Institute, Washington, D.C.
11.
Reynolds, A. G., and Sharp, J. V. (1991). “The fatigue performance of tubular joints—an overview of recent work to revise Department of Energy Guidance.” Proc. 4th Int. Symp. on Integrity of Offshore Struct., D. Faulkner, M. S. Cowling, and A. Incecik, eds., Elsevier Science, Essex, U.K., 261–277.
12.
Sawada, Y., Idogaki, S., and Sekita, K. (1979). “Static and fatigue tests on T joints stiffened by an internal ring.” Proc. 11th Offshore Technology Conf., Offshore Technology Conference Inc., Houston, Texas, 563–574.
13.
Stacey, A., and Sharp, J. V. (1997). “Fatigue damage in offshore structures—causes, detection and repair.” Proc. 8th Int. Conf. on the Behaviour of Offshore Struct. (BOSS 97), J. H. Vugts, ed., Elsevier Science, Oxford, U.K., Vol. 3, 77–91.
14.
“Structural welding code: Steel.” (1992). ANSI/AWS-D1.1-92, 13th ed., American Welding Society, Miami, Fla.
15.
Tahan, N., Nichols, N. W., Sharp, J. V., and Ma, S. Y. A. (1992). “Uncertainties associated with the behaviour of ring-stiffened joints derived from an in-service database.” Proc. 6th Int. Conf. on the Behaviour of Offshore Struct. (BOSS 92), M. H. Patel and R. Gibbins, eds., BPP Technical Services Ltd., London, U.K.
16.
Tolloczko, J. A., and Lalani, M. (1988). “The implication of new data on the fatigue life assessment of tubular joints.” Proc. 20th Offshore Technology Conf., Offshore Technology Conference Inc., Houston, Texas, 407–427.
17.
U8 crack microgauge user manual. (1989). Krautkramer, Hurth, Germany.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 126 • Issue 7 • July 2000
Pages: 809 - 815
History
Received: Jan 11, 1999
Published online: Jul 1, 2000
Published in print: Jul 2000
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