Pushover and fatigue analysis of fixed offshore jacket structure

M Vishnu, J Joemon, K Karthik

Abstract


In this paper, jacket structure analysis is performed to evaluate the load-carrying capacity under fatigue loading and extreme loading. The support structures in deepwater like fixed jackets tend to lack axis symmetry, hence have different capacities for wave loading in various directions. The jacket studied here is discretized using simple finite element method and nonlinear analysis. The prediction of fatigue damage of members can further aid in the process of inspection planning and maintenance of the offshore structure. The analysis can be further developed for producing optimal cost-effective structural designs with enhanced structural safety under extreme or accidental loads. 

Keywords: Pushover, fatigue, offshore jacket, FEM.


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References


American Petroleum Institute-API.

(2000) Recommended practicefor

planning, design and constructing

fixed offshore platforms– working

stress design,21st ed, (American

Petroleum Institute, Washington (DC))

Det Norske Veritas

(1999)ULTIGUIDE - Best practice

guideline for use of non-linear

analysis methods in documentation of

ultimate limit states for jacket type

offshore structures. (Hovik, Norway)

Golafshani, A, A., Bagheri, V.,

Ebrahimian, H., Holmas,

T.(2011)Incremental wave analysis

and its application to performancebased

assessment of jacket platforms,

J. Construct Steel Res., 67, pp. 1649–

Moan, T. (2009), Development of

accidental collapse limit state criteria

for offshore structures. Structural

safety, 1, pp. 124–135

Potty, NS.,Akram, MKBM. (2009),

Structural integrity management for

fixed offshore platforms in

Malaysia.World Acad. Sci. Eng.

Technol., 58, pp. 1079–87

SINTEF Group. (2001), USFOS

getting started , Structural

engineering, Marintek, SINTEF Group

Skallerud, B., Amdahl, J.

(2002)nonlinear analysis of offshore

structures, (Research Studies Press,

UK)

Wong, MB. (2009)Plastic analysis

and design of steel structures(library

of congress catalog)

Worldwide Offshore Accident

Databank, (1996) Det Norske

Veritas(Oslo)


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