Universiti Teknologi Malaysia Institutional Repository

Reliability-based design and assessment for lifetime extension of ageing offshore structures

Mat Sooma, E. and Abu Husain, M. K. and Mohd. Zaki, N. I. and Azman, N. U. and Najafian, G. (2016) Reliability-based design and assessment for lifetime extension of ageing offshore structures. In: ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2016, 19-24 June 2016, Busan, South Korea.

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The methodology for Reliability-Based Design and Assessment (RBDA) of an ageing fixed steel offshore structure was established to support detailed re-assessment applied to the management of the structure's safety, integrity analysis and reliability by evaluating the loading acting on the structure. It is a tool for the high-end analysis of the structure for risk-based design assessment and has been succesfully implemented in the North Sea under Shell operating company. The main purposes of RBDA are to manage a structure's risk level over its remaining service life and to initiate the cost-efficient inspection or mitigation actions (if required). This method consists of Type I and II uncertainties used to determine the probability of failure for the structure over its remaining service life. However, limited work has been done so far on its application at many different regions, particularly in the South East Asia. Therefore, this paper investigates the robustness of the RBDA methodology applied to fixed offshore structures at shallow waters of Malaysia by considering the native environmental criteria, local authorities' obligation and company requirements. It is shown that this procedure can efficiently assist in understanding the structure's failure mechanism and correctly define the relevant type of mitigations required.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Base shear, Convolution method, Integrity and reliability, Long-term load distribution, Non-linear collapse analysis, Reserve Strength Ratio
Subjects:T Technology > T Technology (General)
Divisions:Razak School of Engineering and Advanced Technology
ID Code:73673
Deposited By: Mohd Zulaihi Zainudin
Deposited On:28 Nov 2017 08:38
Last Modified:28 Nov 2017 08:38

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