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Volume 14, Issue 27 (7-2018)                   marine-engineering 2018, 14(27): 111-117 | Back to browse issues page

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Shabakhty N, Jabbari E, Salehi J. Reliability Analysis of damaged jacket platform under ship impact . marine-engineering. 2018; 14 (27) :111-117
URL: http://marine-eng.ir/article-1-578-en.html
1- Iran University of Science and Technology
Abstract:   (2461 Views)
Marine vessels may cause accidental damage to the offshore platforms during uploading oil and gas production in the storm conditions or incorrect navigation by ship’s captain. This impact of sea-going vessels is source of local or global deformations in the offshore structures. In this research the reliability indexes of damaged members under vessels impact are estimated for a platform in the phase 19 of the South Pars using the first-order reliability method (FORM).Only deformation of structural members are considered as damage impact and energy dissipation during collision is not addressed in this research. The time consuming Monte Carlo simulation Method (MCS) and Important Sampling (I.S.) are used to verify the first-order reliability method because the limit state function in FORM is linear-zed by the Taylor series. At first, the wave force is applied into the safe structure, and reliability indexes are estimated for structural members. Then, in addition to the wave loads, the deformations caused by the assumed collision are also taken into account and structural reliability is estimated in the damaged state and corresponding results are compared with each other.  Finally, combinations of wave and current, wave directions, and damages scenarios in chord, vertical and horizontal bracing are considered and results are compared.
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Type of Study: Technical Note | Subject: Offshore Structure
Received: 2017/01/14 | Accepted: 2018/06/11

1. Taby, J.,Moan,T., (1985), Collapse and Residual Strength Damaged Tubular Elements, Behavior of Offshore Structhres, p. 395-408.
2. Gjerde, P.,Parsons,S.J., (1999), Assessment of Jack-up Boat Impact Analysis Methodology, Marine Structures, p. 371-401. [DOI:10.1016/S0951-8339(99)00022-2]
3. Salman, V., (1994), Damage Assessment of Tubular Members in Offshor Structures.
4. Nowak, A.,Collins, K, (2000), Reliability of Structures, Mc Graw-Hill Professional.
5. Standard, Norsok, (2004), Design of Steel Structures, N-004.
6. Jilun.M., Zhaobing.W.,Shengxie.X., (2014), The basic impact load model on deep water pier-ship collision, Chemical and Pharmaceutical Research, p. 316-326.
7. Ellinas.P., Walker.C., (1983), Damage on offshore tubular bracing members.
8. Pual.F., (2005), Damaged Tubular Member Strength Formulations for ISO Fixed Steel Structures Offshore Standard, Steel Structures, p503-511.
9. DNV-RP-C204, (2016), Design Against Accidental Loads.
10. Health & Safety Executive, (2004), Ship collison and capacity of brace memebers of ifxed steel offshore platforms, Research Report 220.

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