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System Reliability for Jacket Platform Subjected to Wave and Current Loads

Kurian, V.J. and Nizamani, Zafarullah and Liew, M. S. and Muhammed , M.A.W. (2012) System Reliability for Jacket Platform Subjected to Wave and Current Loads. In: ESTCON - ICCOEE 2012, 12-14 June 2012, Kuala Lumpur.

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Abstract

Abstract—Codes applicable to Jacket platforms such as API WSD, API LRFD and ISO 19902, are based on component and joint reliability design. They consider overall structural integrity, redundancy and multiple failure paths only indirectly by using structural integrity assessment methods. Failure of a single component does not mean that the capacity of platform has reached the limit and hence for the reassessment of old platforms component based approach becomes unviable. So instead of component reliability, system reliability analysis method is used to check the reserve strength of the platform and find its redundancy. In this study, the maximum wave height is increased corresponding to applied wave load and base shear of platform is obtained using SACS analysis. Regression analysis is used to find the constants for load equation by converting the wave and currents forces into environmental load model by the use of curve fit tool of Matlab. Probabilities of failure, return periods, safety indices and their COV are obtained against an RSR of 1.5-2.5. Finally target probability of failure is compared with achieved failure probability. Keywords— Reserve strength ratio, Base shear, Return periods, Jacket Platform, Environmental loads.

Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TC Hydraulic engineering. Ocean engineering
T Technology > TA Engineering (General). Civil engineering (General)
Departments / MOR / COE:Research Institutes > Deep Water Technology
ID Code:8005
Deposited By: Prof Dr Kurian V John
Deposited On:12 Sep 2012 01:13
Last Modified:19 Jan 2017 08:21

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