An updated consecutive modal pushover (UCMP) procedure for estimating the ductility level earthquake design demands of jacket offshore platforms

2021 ◽  
Vol 145 ◽  
pp. 106680
Author(s):  
Mohamad Zarrin ◽  
Mehdi Poursha ◽  
A.R. Mostafa Gharabaghi
Keyword(s):  
Offshore Platforms ◽  
Earthquake Design ◽  
Modal Pushover

The Effects of Free Field Ground Motion Analysis on Seismic Response of Offshore Piles

2005 ◽  
Author(s):  
Mehrdad Kimiaei ◽  
Mohsen Ali Shayandar ◽  
M. Hesham El Naggar ◽  
Ali Akbar Aghakouchak
Keyword(s):  
Seismic Response ◽  
Ground Motion ◽  
Free Field ◽  
Nonlinear Behavior ◽  
Winkler Foundation ◽  
Main Concern ◽  
Offshore Platforms ◽  
Seismic Excitations ◽  
Earthquake Design ◽  
Offshore Piles

Nonlinear response of piles is the most important source of potentially nonlinear behavior of pile-supported offshore platforms due to earthquake excitations. Earthquake design of offshore platforms is one of the main parts in offshore platforms design on which seismic soil pile structure interaction could be the main concern. In this paper, seismic response of offshore piles embedded in layered soil deposits is determined using a BNWF model (Beam on Nonlinear Winkler Foundation). Results of the free field ground motion analyses using equivalent-linear or nonlinear approaches are applied as input seismic excitations to the support nodes of BNWF model. Sensitivity of the results to input ground motions are discussed and addressed in this paper. Computed responses are also compared with centrifuge test results.

Sensitivity Study on Nonlinear Seismic Response of Offshore Jackets Due to Different Earthquake Events

2007 ◽  
Author(s):  
Mehrdad Kimiaei
Keyword(s):  
Seismic Response ◽  
Soil Structure ◽  
Sensitivity Study ◽  
Soil Structure Interaction ◽  
Main Concern ◽  
Fe Model ◽  
Offshore Platforms ◽  
Structure Interaction ◽  
Nonlinear Seismic Response ◽  
Earthquake Design

Earthquake design of offshore platforms is one of the main parts in offshore platforms design on which seismic soil pile structure interaction could be the main concern. In seismically active areas, it is often necessary to perform a dynamic analysis that accounts for nonlinear pile soil structure interaction effects. Based on a previously developed numerical BNWF-FE model for nonlinear seismic response of offshore platforms, in this paper, sensitivity of seismic response of an existing sample offshore platform to different earthquake events (with different duration and different frequency contents) together with the sensitivity of the results to the model main parameters are investigated.

A method of technical diagnostics for offshore structures

1994 ◽  
Vol 16 (2) ◽  
pp. 43-48
Author(s):  
Do Son
Keyword(s):  
Diagnostic Method ◽  
Joint Venture ◽  
Oil And Gas ◽  
Residual Life ◽  
Life Time ◽  
Offshore Structures ◽  
Technical Diagnostics ◽  
Offshore Platforms ◽  
South Vietnam ◽  
Local Destruction

This paper describes the results of measurements and analysis of the parameters, characterizing technical state of offshore platforms in Vietnam Sea. Based on decreasing in time material characteristics because of corrosion and local destruction assessment on residual life time of platforms is given and variants for its repair are recommended. The results allowed to confirm advantage of proposed technical diagnostic method in comparison with others and have been used for oil and gas platform of Joint Venture "Vietsovpetro" in South Vietnam.

Managing Structural Integrity of Offshore Platforms: Looking Back to Drive the Future

2013 ◽  
Author(s):  
Roberto Piva ◽  
Margherita Latronico ◽  
Andrea Nero ◽  
Stefano Sartirana
Keyword(s):  
Structural Integrity ◽  
Offshore Platforms ◽  
The Future ◽  
Looking Back
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