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Ocean Systems Engineering
  Volume 10, Number 3, September 2020 , pages 243-266
DOI: https://doi.org/10.12989/ose.2020.10.3.243
 

Numerical analysis for structure-pile-fluid-soil interaction model of fixed offshore platform
Shehata E. Abdel Raheem, Elsayed M. Abdel Aal, Aly G.A. AbdelShafy, Mahmoud H. Mansour and Mohamed Omar

 
Abstract
    In-place analysis for offshore platforms is required to make proper design for new structures and true assessment for existing structures. In addition, ensure the structural integrity of platforms components under the maximum and minimum operating loads and environmental conditions. In-place analysis was carried out to verify the robustness and capability of structural members with all appurtenances to support the applied loads in either operating condition or storm conditions. A nonlinear finite element analysis is adopted for the platform structure above the seabed and the pile–soil interaction to estimate the in-place behavior of a typical fixed offshore platform. The SACS software is utilized to calculate the natural frequencies of the model and to obtain the response of platform joints according to in-place analysis then the stresses at selected members, as well as their nodal displacements. The directions of environmental loads and water depth variations have an important effect on the results of the in-place analysis behavior. The influence of the soil-structure interaction on the response of the jacket foundation predicts is necessary to estimate the loads of the offshore platform well and real simulation of offshore foundation for the in-place analysis. The result of the study shows that the in-place response investigation is quite crucial for safe design and operation of offshore platform against the variation of environmental loads.
 
Key Words
    FEM; offshore platform; storm conditions; pile soil interaction; in-place analysis
 
Address
Shehata E. Abdel Raheem, Aly G.A. AbdelShafy and Mahmoud H. Mansour: Department of Civil Engineering, Faculty of Engineering, Assuit University, Assiut 71516, Egypt
Elsayed M. Abdel Aal: Egypt Gas Company, Alexandria, Egypt
Mohamed Omar: Department of Civil Engineering, Faculty of Engineering, Aswan University, Aswan, Egypt
 

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