Essentials of Offshore Structures: Framed and Gravity Platforms

Essentials of Offshore Structures: Framed and Gravity Platforms examines the engineering ideas and offshore drilling platforms for exploration and production. This book offers a clear and acceptable demonstration of both the theory and application of the relevant procedures of structural, fluid, and geotechnical mechanics to offshore structures. It makes available a multitude of "solved problems" and "sample problems to solve" which give readers a strong understanding of the analysis and design of steel-framed and base-supported concrete gravity offshore structures. The book highlights sensible engineering applications for offshore structural design, research, and development; it can also be useful to those working in the design industry.

The user will have a detailed overview of the various structures used in the offshore environment and the preliminary costing factors that will influence their choice for the site.
Analytical principles emphasized in the book will help the user to clearly comprehend the various issues that need to be taken into account in the analysis and design of an offshore structure, using the API code.
The book includes extensive worked-out problems and sample problems for use by the students and instructors, with a Solution Manual.
The seabed pile/gravity foundation analyses and design are clearly outlined with their embedment characteristics and problems worked out.
A global description of environmental forces has been given that includes those due to wave, wind, current, tides, earthquakes, ice floe/sheet action, and limit ice-load on Arctic structures.
The book outlines the various factors that influence the material choice for offshore structures including fatigue and corrosion of the platforms in the ocean environment.

Separate chapters detail the factors that influence the pile embedment and concrete gravity foundation characteristics, material choice including fatigue and corrosion, estimation of ocean environmental forces that will be exerted on the offshore structures, and the analysis fundamentals that the reader needs to possess. The last two chapters give detailed insights into the analysis and design of framed and concrete gravity platform offshore structures using API code procedures. Overall, this book is a comprehensive presentation of the analysis and design of steel and concrete offshore structures.

OFFSHORE OPERATIONS AND STRUCTURAL DEVELOPMENT

Introduction

Current State of Industry

Commercial Projections for the Offshore Industry

Structural Concept Evaluation and Innovative Development

Legal Jurisdiction

History of Offshore Structural Development

Exercise Problems

Appendix

COMPONENTS OF A TYPICAL OFFSHORE STRUCTURE

Introduction

Functional and Structural Requirements of a Platform

Components of a Fixed Jacket Steel Platform

Components of a Jack-up Steel Platform

Components of a Concrete Gravity Platform

Components of a Ship Structure

Modern Trends

Components of a Semi-submersible

Exercise Problems

OCEAN ENVIRONMENT - WIND, WAVE, CURRENT, TIDES, ICE AND SEISMIC EFFECTS

Introduction

Description of the Ocean Environment

Ocean Wind and Wind Statistics

Ocean Waves and Wave Statistics

Ocean Currents

Solar and Lunar Ocean Tides

Seismological Considerations, Earthquakes, and Seaquakes

Ice Environment and Properties

Exercise Problems

SEABED MECHANICS

Introduction

Ocean floor characteristics and characterization

Offshore site investigation and equipment used

Ocean bed soil mechanics

Bearing capacities of offshore platforms

Exercise Problems

MATERIALS AND THEIR BEHAVIOR IN THE OCEAN ENVIRONMENT

Material requirements for offshore structures

Mechanical properties for marine use

Range of material properties and material selection

Marine corrosion and biodegradation

References

Exercise Problems

ENVIRONMENTAL FORCES ON OFFSHORE STRUCTURES

Introduction

Design Conditions for Loads (Forces) Acting on the Structure

Environmental Forces

References

Exercise Problems

FUNDAMENTAL CONSIDERATIONS FOR FRAMED OFFSHORE STRUCTURAL ANALYSIS

Introduction

Site characteristics and modeling procedures for analyses

Hydrostatic pressure and buoyancy

Preliminary considerations for static analysis and design

Finite element applications for framed offshore structural analyses

Formulation of solid-fluid interaction problem

Simplified lumped mass/stiffness considerations for dynamic analyses

References

Exercise Problems

ANALYSIS AND DESIGN CONSIDERATIONS FOR FRAMED STEEL OFFSHORE STRUCTURES

Introduction to Frame Analysis for Offshore Structures

Design Considerations for the Offshore Steel Jacket Structure

Analysis of Pile Foundations for Offshore Structures

p-y Curve Approach

Classical Derivations for Pile-Soil Interaction

Code-based Foundation Design for Pile-supported Offshore Structures

References

Exercise Problems

ANALYSIS AND DESIGN OF CONCRETE GRAVITY STRUCTURES

Introduction and design environmental conditions

Bearing capacities of gravity platform foundations

Static deformation of gravity platform foundations

Analysis and Design of a Gravity Platform Subjected to Wave loads

References

Exercise Problems

D. V. Reddy, Ph.D., P.E., P. Eng., C. Eng (U.K.) is a professor of civil, environmental and geomatics engineering, and director, Center for Marine Structures and Geotechnique, Florida Atlantic University, Boca Raton, FL, U.S.A. He has held professorships at the Indian Institute of Technology Madras, Chennai, India; Memorial University of Newfoundland, St. John’s, NL, Canada; and University of Florida, Gainesville, FL, U.S.A.; and visiting professorships at a number of universities. He has taught courses on offshore and coastal structures for over 30 years. His research interests are in the areas of marine structures, materials, and geotechnical engineering, with particular focus on concrete technology and computational/analytical mechanics. He is a Fellow of the American Concrete Institute. He has authored over 370 papers, two books, edited three conference volumes; and been recognized by a number of awards.

Dr. A.S.J. Swamidas, Ph.D, has held professorships at the Indian Institute of Technology Madras, Chennai, India; and at Memorial University of Newfoundland, St. John’s, NL, Canada. He has taught offshore structures for more than 20 years and acted as a consultant to a number of companies. His research interests are in the area of dynamics of offshore and onshore structures. He has authored over 210 papers/reports, and edited two conference volumes.

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