Structural Reliability Analysis of Floating Offshore Structure
Present paper is concerned with the system reliability analysis of a floating offshore structure using the developed algorithm called’ Extended Incremental Load Method’, which is an extended approach of the conventional incremental load method, and has been developed in order to extend its applicability to the system reliability analysis of a structure under multi-loadings and to more realistically take into account the post-failure component behaviour.
The modified equation of safety margin is proposed to use the existing strength formula for principle components of a floating offshore structure, in which the concept of the First-Order Second Moment Method is used.
The application to a simple frame structure and a Tension Leg Platform have been carried out and their results show the validity of the proposed approach.
KeywordsFailure Mode Failure Probability Reliability Index System Reliability Load Effect
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- Mansour, A.E. and Faulkner, D., “On Applying the Statistical Approach to Extreme Sea Loads and Ship Hull Strength”, Trans. RINA Vol.115 (1973) pp.277–314Google Scholar
- ABS-CONOCO, “Model Code for Structural Design of Tension Leg Platforms”, CONOCO-ABS TLP Rule Case Committee, Final Report, ABS, New York (1984)Google Scholar
- Guenard, Y.F., “Application of System Reliability Analysis to Offshore Structures”, John A. Blume Earthquake Engineering Centre, Stanford Univ., U.S.A., Report No.71 (1984)Google Scholar
- Murotsu, Y., “Reliability Analysis of Framed Structure Through Automatic Generation of Failure Modes”, Reliability Theory and its Application in Structural and Soil Mechanics P.Thoft-Christensen ed., Martinus Nijhoff Pub. (1983), pp.525–540Google Scholar
- Moses, F. and Stahl, B., “Reliability Analysis Format for Offshore Structures”, Proc. 10 th Offshore Technology Conference OTC 3046 (1978), pp.29–38Google Scholar
- Moses, F. and Rashedi, M.R., “The Application of System Reliability to Structural Safety”, Proc. 4 th Intl. Conf. on Applications of Statics and Probability in Soil and Structural Engineering Univ. de Fierenze, Florence, Italy, G.Augusti et al ed., Vol.1 (1983), pp.573–584Google Scholar
- Amdahl, J., Taby, J. and Granli, T., “Progressive Collapse Analysis of Mobile Platforms”, Proc. PRADS’87 (1987), pp.1060–1072Google Scholar
- Murotsu, Y., Okada, H., Ikeda, Y. and Matsuzaki, S., “On the System Reliability of Semi-submersible Platform”, Proc. PRADS’87 (1987), pp.752–764Google Scholar
- Lee, J.S. and Faulkner, D., “System Reliability Analysis of Structural System”, Dept. of Naval Arch. and Ocean Engineering, Univ. of Glasgow Report, NAOE-88–33 (1988)Google Scholar
- Lee, J.S. and Faulkner, D., “Reliability Analysis of TLP Structural Systems”, 8 th Intl. Conf. on Offshore Mech. and Arctic Engg. The Hague, The Netherlands (1989) (paper submitted)Google Scholar
- Faulkner, D., Chen, Y.N. and de Oliveira, J.G., “Limit State Design Criteria for Stiffened Cylinders of Offshore Structures”, ASME 4th National Congress of Pressure Vessels and Pining Technology Portland, Or. (1983), pp.1–11Google Scholar
- Faulkner, D. and Warwick, D.M., “Predicting the Strength of Welded Stiffened Cylinders”, Proc. Intnl. Symp. Developments in Deep Waters, RINA, London (1986)Google Scholar
- Lee, J.S., “Pre-and Post-Ultimate Behaviour Analysis and Derivation of Strength Model of Rectangular Box Girder”, Dept. of Naval Arch. and Ocean Engineering, Univ. of Glasgow Report, NAOE-87–27 (1987)Google Scholar
- Lee, J.S., “Basic Study on the System Reliability Analysis of Floating Offshore Structures’, Progressive Report, Dept. of Naval Arch. and Ocean Engineering, Univ. of Glasgow (1987) (unpublished)Google Scholar
- Faulkner, D., Guedes Soares, C. and Warwick, D.M., “Modelling Requirements for Structural Design and Assessment”, Proc. 3rd Intl Conf. onIntegrity of Offshore Structures, Elsevier Applied Science, Univ. of Glasgow, D.Faulkner et al ed., Paper No.2 (1987), pp.25–54Google Scholar
- Guenard, Y., Goyet, J., Labeyrie, J. and Remy, B., “Structural Safety Evaluation of Steel Jacket Platforms”, Proc. Marine Structural Reliability Symposium, The Ship Structure Committee and SNAME, Arlington, VA (1987), pp.169–183Google Scholar
- Thoft-Christensen, P. and Baker, M.J.,“Structural Reliability Theory and its Applications”, Springer-Verlag (1982)Google Scholar
- Karamchandani, A., “Structural System Reliability Analysis Method”, John A. Blume Earthquake Engineering Centre, Stanford Univ., U.S.A., Report No.83 (1987)Google Scholar
- Faulkner, D., “Tension Leg Platforms - From Hutton to Jolliet” or “Deep Water without Deep Pockets”, Dept. of Naval Arch. and Ocean Engineering, Univ. of Glasgow Report, NAOE-88–26 (1988)Google Scholar
- Chung, J.S., “Offshore and Arctic Frontier: Structures, Ocean Mining”, Mechanical Engineering (1985), pp.55–63Google Scholar
- Chen, Y.N., Liu, D. and Shin, Y.S., “Probabilistic Analysis of Environmental Loading and Motion of a Tension Leg Platform for Reliability-Based Design”, Centenary Conference on Marine Safety Univ. of Glasgow, Paper No.17 (1983)Google Scholar
- Morison, J.R., O’Brien, M.P., Johnson, J.W. and Schaaf, S.A., “The Force Exerted by Surface Waves on Piles”, J. of Petroleum Technology. AIME Vol.189 (1950), pp.149–154Google Scholar
- Ellis, N., Tetlow, J., Anderson, D. and Woodhead, L., “Hutton TLP Vessel - Structural Configuration and Design Features”, Proc. 14 th Offshore Technology Conf„ OTC 4427 (1982), pp.557–571Google Scholar
- de Oliveira, J.G. and Zimmer, R.A., “Redundancy Consideration in the Structural Design of Flating Offshore Platforms”, The Role of Design. Inspection and Redundancy in Marine Structural Reliability D.Faulkner et al ed., National Academy Press (1984), pp.293–327Google Scholar