Nonlinear Performance of Offshore Platforms in Extreme Storm Waves
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 122, Issue 2
Abstract
Dynamic-transient loading effects from extreme storm waves can have important influences on the nonlinear ultimate limit state performance of fixed offshore platforms. Recorded and synthetic storm wave time histories have been used to develop loading time histories acting on template-type platforms having natural periods in the range of 1–5 s. The interactions of these loading histories with the dynamic, nonlinear, hysteretic performance characteristics of idealized systems were analyzed. A modification to static pushover capacity analysis results is proposed to enable recognition of transient loading–structure performance characteristics. The results from the idealized systems were correlated with results from time domain nonlinear analyses of platform structure systems subjected to intense wave and earthquake loadings. For the global behavior of the platforms studied, the results based on the simplified systems are in good agreement with those from the complete analyses.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
American Petroleum Institute, API. (1993). “Recommended practice for planning, designing and constructing fixed offshore platforms—Load and resistance factor design.”API Recommended Practice 2A-LRFD (RP2A-LRFD), First. Ed., Washington, D.C., July.
2.
Bea, R. G. (1991). “Loading and load effects uncertainties.”Rep. to Can. Standards Assoc., Verification Program for CSA Code for the Design, Construction and Installation of Fixed Offshore Structures Proj. No. D-3, October, Canadian Standard Association, Ottowa, Canada.
3.
Bea, R. G.(1992a). “Pile capacity for axial cyclic loading.”J. Geotech. Engrg., ASCE, 118(1), 34–50.
4.
Bea, R. G. (1992b). “Structural reliability: Design and re-qualification of offshore platforms.”Proc., Int. Workshop on Reliability of Offshore Operations, NIST Spec. Publ. 833, E. Simiu, ed., Nat. Inst. of Standards and Tech., Gaithersburg, Va., 41–68.
5.
Bea, R. G. (1993). “Evaluation of uncertainties in loadings on offshore structures due to extreme environmental conditions. “J. Offshore Mech. and Arctic Engrg., 115(Nov.), 237–245.
6.
Bea, R. G., and Craig, M. J. K. (1993). “Development in the assessment and requalification of offshore platforms.”Proc., Offshore Tech. Conf., OTC No. 7138, Vol. 3, Offshore Technology Conference, Richardson, Tex., 9–27.
7.
Bea, R. G., and DesRoches, R. (1993). “Development and verification of a simplified procedure to estimate the capacity of template-type platforms.”Proc., 5th Int. Symp. on Integrity of Offshore Struct. IOS '93, Glasgow Univ., Glasgow, Scotland, 129–148.
8.
Bea, R. G., and Young, C. N. (1993). “Loading and capacity effects on platform performance in extreme waves and earthquakes.”Proc., Offshore Tech. Conf., OTC NO. 7140, Vol. 3, Offshore Technology Conference, Richardson, Tex., 1–16.
9.
Blevins, R. D. (1977). Flow-induced vibrations . Van Nostrand Reinhold Co., New York, N.Y.
10.
Greenbaum, J. (1994). “Effects of cyclic degradation on dynamic response of marine foundations in extreme storm waves.”Proj. Rep., Dept. of Naval Architecture & Offshore Engrg., University of California, Berkeley.
11.
Gudmestad, O. T. (1984). “Nonlinear effects in hydrodynamic waves with some applications to offshore structures.”Res. Rep. R84-08, Order No. 768, Dept. of Civ. Engrg., MIT, Cambridge, Mass.
12.
Hahn, G. D.(1995). “Effects of sea-surface fluctuations on response of offshore structures.”J. Struct. Engrg., ASCE, 121(1), 63–74.
13.
Heideman, J. C., and Weaver, T. O. (1992). “Static wave force procedure for platform design.”Proc., Civ. Engrg. in the Oceans V, ASCE, New York, N.Y., 496–517.
14.
Karunakaran, D., Spidsøe, N., Gudmestand, O. T., and Moan, T. (1993). “Stochastic dynamic tome domain analysis of drag-dominated offshore platforms.”Struct. Dynamics—EURODYN '93, Moan et al., eds., Balkema, Rotterdam, 1165–1174.
15.
McDonald, D. T., Bando, K., Bea, R. G., and Sobey, R. J. (1990). “Near surface wave forces on horizontal members and decks of offshore platforms.”Final Rep., Coast. and Hydr. Engrg., Dept. of Civ. Engrg., Univ. of California, Berkeley.
16.
Morison, D. G. (1992). “Dynamic design of deep water bottom-founded towers.”Proc., Civ. Engrg. in the Oceans V, R. T. Hudspeth, ed., ASCE, New York, N.Y., 850–889.
17.
Ruhl, J. A. (1976). “Offshore platforms: observed behavior and comparisons with theory.”Proc., Offshore Tech. Conf., OTC No. 2553, Vol. 2, Offshore Technology Conference, Richardson, Tex., 333–352.
18.
Spidsøe, N., and Langen, I. (1985). “Damping of fixed offshore platforms.”Proc., Behaviour of Offshore Structures BOSS'85 Conf., Elsevier Science Publishers, Amsterdam, The Netherlands, 915–925.
19.
Stewart, G. (1992). “Non-linear structural dynamics by the pseudo-force influences method, part II: Application to offshore platform collapse.”Proc., Int. Offshore and Polar Engrg. (ISOPE) Conf., Int. Assoc. of Offshore and Polar Engrs. (ISOPE), Golden, Colo., Vol. 1, 264–271.
20.
Tromans, P. S., and van de Graaf, J. W. (1992). “A substantial risk assessment of a jacket structure.”Proc., Offshore Tech. Conf., OTC No. 7075, Vol. 2, Offshore Technology Conference, Richardson, Tex., 651–662.
21.
Tung, C. C., and Yang, C. H. (1991). “Effects of free surface fluctuation on response of offshore structures.”Proc., First Int. Offshore Polar Engrg. Conf., Society of Offshore and Polar Engineers, Goldon, Colo., 183–193.
22.
Zayas, V. A., Shing, P.-S. B., Mahin, S. A., and Popov, E. P. (1981). “Inelastic structural modeling of braced offshore platforms for seismic loading.”Rep. No. UCB/EERC-81/04, Earthquake Engrg. Res. Ctr., Univ. of California, Berkeley.
Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 122 • Issue 2 • March 1996
Pages: 68 - 74
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Mar 1, 1996
Published in print: Mar 1996
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.