Design of Offshore Structures

IIT Madras Course , Prof. S. Nallayarasu

Lecture 1: Loads On Offshore Structures - 1

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Lecture Details :

Design of Offshore Structures by Prof. Dr. S. Nallayarasu, Department of Ocean Engineering, IIT Madras. For more details on NPTEL visit http://nptel.iitm.ac.in

Course Description :

Loads on Offshore Structures:Wind Loads; Wave and Current Loads; Calculation based on Maximum base Shear and Overturning Moments; Design Wave heights and Spectral Definition; Hydrodynamic Coefficients and Marine growth; Fatigue Load Definition and Joint Probability distribution; Seismic Loads;Concepts of Fixed Platform Jacket and Deck:Jacket concepts, redundant framing arrangement; Launch and Lift jackets; Simple Deck configurations for Lift and float-over installations; In-service and Pre-service Loads and analysis;Steel Tubular Member Design:Principles of WSD and LRFD; Allowable stresses and Partial Safety Factors; Tubular Members, Slenderness effects; Column Buckling, Design for Hydrostatic pressure; Design for combined axial and bending stresses (API RP 2A guidelines);Tubular Joint Design for Static and Cyclic Loads:Simple tubular joints, design using allowable loads; stress concentration factors; S-N curves and fatigue damage calculations

Submarine Pipelines and Risers:Route selection and Diameter / wall thickness calculations; Pipeline stability, free span calculations; Concrete coated pipelines and pipe-in-pipe insulated pipelines; Design using DNV 81 code;Design against Accidental Loads (Fire, Blast and Collision):Behavior of steel at elevated temperature; Fire Rating for Hydrocarbon fire; Design of structures for high temperature; Blast Mitigation-Blast walls; Collision of Boats and energy absorption; Platform survival capacity and Plastic design methods

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