Abstract
Tubular members have been used for constructing offshore structures. Large-scale fatigue tests of welded tubular K-joints under the balanced in-plane bending brace were carried out to investigate the fatigue behavior of API 2W Gr.50 steel produced by POSCO. The experimental results were verified by numerical approaches and compared with the IIW, DnV RP-C203 and API RP 2A-WSD design curves. The test results based on the hot spot stress were in agreement with the design curves. The SCF factor for tubular K-joint was also obtained. The numerical parametric study of the K-joint (using the finite element program) was described and its results were compared with experimental results. The stress effects of various parameters including α, β, γ, τ and θ on the stress in the K-joint were investigated. The stress distribution for each parameter was introduced. The study showed that the maximum stress of the joint varied according to the variation of joint parameters.
Similar content being viewed by others
References
Lourenssen A A, Dijkstra O D. Fatigue tests on large post weld heat treated and as welded tubular T-joints. Offshore Technology Conference, Houston, 1982. 327–334
Wylde J G. Fatigue tests on welded tubular T-joints with equal brace and chord diameters. Offshore Technology Conference 4527, Houston, 1983. 133–142
Guanghai, W, Bozhen C. Fatigue behaviour of tubular joints made of China-made platform steel. China Ocean Eng, 1992, 6(1): 103–110
Agerskov H, Pertersen R I, Martinez L L. An investigation on fatigue in high-strength steel offshore structures. Weld World, 1988, 13: 328–342
Sonsino C M, Umbach R. Hybrid design concept using high-strength cast steel inserts for tubular joints of offshore structures. Fatigue, 1996, 2: 1225–1230
Hara M, Kawai Y, Narumoto A, et al. Corrosion fatigue strength of 490 MPa class high-strength steels produced by the thermo-mechanical control process. OTC 5311, 1986. 175–185
Dover W D, Dharmavasan S. Fatigue fracture mechanics analysis of T and Y Joints. OTC 4404, 1982. 315–326
Kuang J G, Potvin A B, Leick R D. Stress concentration in tubular joints. OTC 2205, 1975. 593–612
Udomworarat P, Miki C, Ichikawa, A, et al. Fatigue performance of composite tubular K-joints for truss type bridge. Structural Eng/Earthquake Eng, JSCE, 2002, 19(2): 9–23
Zhao X L, Herion S, Packer J A, et al. Design Guide for Circular and Rectangular Hollow Section Welded Joints under Fatigue Loading, CIDET. Koln: TÜV-Verlag GmbH, 2000
Schumacher A. Fatigue vehaviour of welded circular Hokko Section Joints in bridges. THĒSE No 2727, Ēcole Polytechnique Fēdērale De Lausanne, 2003
van Wingerde A M, Puthli R S, Wardenier J, et al. Design recommendations and commentary regarding the fatigue behaviour of hollow section joints. Proceedings of the 2nd International Offshore and Polar Engineering Conference, San Francisco, USA, 1992. 288–295
van Wingerde A M, van Delft D R V, Wardenier J, et al. Scale effects on the fatigue behaviour of tubular structures. WRC Proceedings IIW, 1997. 123–135
Lourenssen A A, Dijkstra O D. Fatigue tests on large post weld heat treated and as welded tubular T-joints. Offshore Technology Conference, Houston, 1982. 327–334
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Jo, CH., Im, SW., Cho, WC. et al. Fatigue crack in large-scale tubular joints for offshore structures. Sci. China Technol. Sci. 54, 705–714 (2011). https://doi.org/10.1007/s11431-010-4275-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11431-010-4275-y