Significance of Soil-Pile-Structure Interaction in Fatigue Analysis of Steel Jacket Offshore Platforms

1989 ◽  
Vol 111 (2) ◽  
pp. 115-121
Author(s):  
A. Gupta ◽  
R. P. Singh
Keyword(s):  
Fatigue Analysis ◽  
Offshore Platforms ◽  
Structure Interaction ◽  
Steel Jacket

An assessment of uncertainties in fatigue analyses of steel jacket offshore platforms

1982 ◽  
Vol 4 (1) ◽  
pp. 9-16 ◽  
Author(s):  
James Kawamoto ◽  
S. Shyam Sunder ◽  
Jerome J. Connor
Keyword(s):  
Offshore Platforms ◽  
Steel Jacket

Elastic-Plastic Analysis of the Interaction between Ice and Offshore Structures

2009 ◽  
Vol 417-418 ◽  
pp. 897-900
Author(s):  
Tao Yu ◽  
Wei Yang ◽  
Li Qiang Tang
Keyword(s):  
Mechanical Properties ◽  
Constitutive Equation ◽  
Stress Field ◽  
Offshore Structures ◽  
Offshore Platforms ◽  
Pressure Sensitivity ◽  
Strength Ratio ◽  
Structure Interaction ◽  
Plastic Analysis ◽  
Distribution Of Stress

In this paper, the mechanical properties of ice, which are affected by the existence of cavities and the different tensile-compression strength ratio, are analyzed in micromechanics view. Then the constitutive equation is established, and the distribution of stress field caused by the ice-structure interaction is constructed with the constitutive equation. Finally, the ultimate bearing capacity of ice is also discussed with different values of pressure sensitivity parameter and the tension-compression ratio. Thus, this paper provides the theoretical reference for offshore platforms design.

Incremental Dynamic Analysis Considering Pile-Soil-Structure Interaction for the Jacket Type Offshore Platforms

2008 ◽  
Author(s):  
Behrouz Asgarian ◽  
Alireza Fiouz ◽  
Ali Shakeri Talarposhti
Keyword(s):  
Dynamic Analysis ◽  
Nonlinear Response ◽  
Limit State ◽  
Nonlinear Behavior ◽  
Incremental Dynamic Analysis ◽  
Layered Soil ◽  
Winkler Foundation ◽  
Offshore Platforms ◽  
Structure Interaction ◽  
Soil Deposits

Nonlinear response of piles is the most important source of potentially nonlinear behavior of offshore platforms due to earthquake excitations. It is often necessary to perform dynamic analysis of offshore platforms that accounts for soil nonlinearity, discontinuity condition at pile soil interfaces, energy dissipation through soil radiation damping and structural nonlinear behaviors of the piles. Incremental dynamic analysis is an analysis method that has recently emerged as a promising tool for thoroughly evaluating the seismic performance of structures. It involves subjecting a structural model to a suite of ground motion records, each scaled to several intensities and recording the responses at each level to form IDA curves of response versus intensity. In this paper, jacket and soil-pile system is modeled and the effects of Soil-Pile-Structure Interaction (SPSI) are considered, and the Incremental Dynamic Analysis (IDA) is used to investigate nonlinear behavior of offshore platforms. An attempt is made to introduce a practical BNWF (Beam on Nonlinear Winkler Foundation) model for estimating the lateral response of flexible piles embedded in layered soil deposits subjected to seismic loading. This model was incorporated into a Finite Element program (OpenSees). All the analyses are performed in two directions and the results are compared with each others. A computer program for Nonlinear Earthquake site Response Analyses of layered soil deposits (NERA) is used for analysis nonlinear response of soil layers. Limit state of the jacket is calculated from incremental dynamic analysis of the jacket using fiber elements for the nonlinear modeling of the system.

Technology of steel jackets load-out in deep-water offshore platforms from the barge

2020 ◽  
pp. 25-29
Author(s):  
F.G. Hasanov ◽  
Keyword(s):  
Deep Water ◽  
Great Majority ◽  
Problem Solution ◽  
Offshore Platforms ◽  
The Caspian Sea ◽  
Gas Field ◽  
Steel Jacket ◽  
Gravity Centre ◽  
Scientific Technical ◽  
Oil Gas

Currently, great attention is paid to the development issue of the shelf’s fuel and energy resources foremost in the oil-gas fields of the Caspian Sea. The problem solution requires the studying of great majority of scientific-technical issues. One of the significant problems is the lead-out of steel jacket from the offshore platform as a major element of oil-gas field hydro-technical facilities meant for the operation in the deep water. The calculations for the execution of operations with steel jacket of deep stationary platform from the block with the detailed chara- cteristics by the mass and gravity center coordinates alongside line data have been carried out with “SACS” and “STAAD.PRO” software programs. The steel jacket is pushed astern with the push-pull equipment on the barge. Due to the shift of gravity centre the jacket changes the trim in the stern. Through the elevation of trim angle brought in alignment with the friction ration between the jacket and barge, the jacket slides further itself. Herewith, the trim increases until the gravity centre of steel jacket on the barge is not in alignment with rotation centre of the large rocker arms. The studies helped to fix the position of the jacket’s gravity centre from the aft perpendicular, the trim moment, the trim of the barge, the draft with the bow and stern and the trim angle as well.

Effect of soil pile structure interaction on dynamic characteristics of jacket type offshore platforms

2012 ◽  
Vol 1 (4) ◽  
pp. 381-395 ◽  
Author(s):  
Behrouz Asgarian ◽  
Hamed Rahman Shokrgozar ◽  
Davoud Shahcheraghi ◽  
Hasan Ghasemzadeh
Keyword(s):  
Dynamic Characteristics ◽  
Offshore Platforms ◽  
Structure Interaction
Sign in / Sign up

Export Citation Format

Share Document