Offshore Structural Engineering: Reliability and Risk Assessment, 1st Edition (Hardback) book cover

Offshore Structural Engineering

Reliability and Risk Assessment, 1st Edition

By Srinivasan Chandrasekaran

CRC Press

254 pages | 101 B/W Illus.

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Successfully estimate risk and reliability, and produce innovative, yet reliable designs using the approaches outlined in Offshore Structural Engineering: Reliability and Risk Assessment. A hands-on guide for practicing professionals, this book covers the reliability of offshore structures with an emphasis on the safety and reliability of offshore facilities during analysis, design, inspection, and planning.

Since risk assessment and reliability estimates are often based on probability, the author utilizes concepts of probability and statistical analysis to address the risks and uncertainties involved in design. He explains the concepts with clear illustrations and tutorials, provides a chapter on probability theory, and covers various stages of the process that include data collection, analysis, design and construction, and commissioning.

In addition, the author discusses advances in geometric structural forms for deep-water oil exploration, the rational treatment of uncertainties in structural engineering, and the safety and serviceability of civil engineering and other offshore structures.

An invaluable guide to innovative and reliable structural design, this book:

  • Defines the structural reliability theory
  • Explains the reliability analysis of structures
  • Examines the reliability of offshore structures
  • Describes the probabilistic distribution for important loading variables
  • Includes methods of reliability analysis
  • Addresses risk assessment and more

Offshore Structural Engineering: Reliability and Risk Assessment provides an in-depth analysis of risk analysis and assessment and highlights important aspects of offshore structural reliability. The book serves as a practical reference to engineers and students involved in naval architecture, ocean engineering, civil/structural, and petroleum engineering.


"… one of its kind… links both risk and reliability with application examples to offshore structures … an essential reference book for practicing engineers in offshore engineering."

—Professor Arvind Kumar Jain, Department of Civil Engineering, Indian Institute of Technology Delhi, India

"This is a great book on the general subjects of structural reliability and risk assessment for off-shore structures. … a comprehensive presentation of the art and science of the assessment of off-shore structure system reliability."

—Shen-En Chen, University of North Carolina at Charlotte, USA

"… gives a basic understanding of all topics related to reliability and risk assessment of offshore structures using probabilistic methods. Examples dealing with Mathieu’s stability and responses to high sea waves and seismic excitation of TLP tethers enable easy understanding of the fundamental concepts. I strongly recommend this book as an essential reference book for academicians, researchers, engineers and professionals in oil and gas industry, as it is the priority now to extend the life of existing platforms based on scientific calculation of reliability leading to accurate prediction of structural integrity."

—Professor Kurian V. John, Universiti Teknologi Petronas, Malaysia

"…there is much to recommend in this book. In addition to basic applicable theory and procedures for which the book could serve as an appropriate educational tool for the beginner and intermediate reader, there are also more than a few applications particular to offshore structures that are interspersed within the text that appear to serve well to hold the reader’s interest in a sustained manner. I am, therefore, happy to recommend this book not only to students of the subject, but also to researchers and engineers. Readers should find it a very good resource of useful information all in one place, not only to supplement their current knowledge, but also to revisit subsequently as needed."

Journal of Ocean Engineering and Marine Energy, March 2017

Table of Contents

Concept of Probability and Sampling Statistics


Reliability and Risk

Types of Uncertainties

Forward Uncertainty Propagation

Bayesian Approach

Rules of Probability

Principles of Plausible Reasoning

Deductive Logic

Deductive Reasoning

Continuous Probability Distribution Functions

Testing of Hypotheses

Simple and Compound Hypotheses

Urn Distribution

Random Variables

Monte Carlo Simulation Method

Importance of Sampling

Directional Simulation

Statistical Theories of Extremes

Modeling of Environmental Loads

Estimate of Distribution Parameters


Structural Reliability Theory


Variables in Reliability Study

Probabilistic Approach

Reliability Levels

Space of Variables

Error Estimation

Classification of Errors

Reliability and Quality Assurance

Uncertainties Inherent in Design

Uncertainties in System Design of Offshore Structures

Reliability Problem

Reliability Methods

First-Order Second Moment Method

Hasofer–Lind Method

Second-Order Reliability Methods

Simulation-Based Reliability Method

Reliability Estimate Using Higher-Order Response Surface Methods

High-Order Stochastic Response Surface Method

System Reliability

General Systems

System Functions for General Systems

Computing System Reliability

First-Order Estimates

Reliability Analysis


Fundamental Analysis

Reliability Bounds for Structural Systems

Application of Structural Codes on Safety

Limit State Functions

Characteristic Value of Basic Variables

Stochastic Modeling

Mechanical Modeling

Mechanical Model and Reliability Coupling

Complexity of Mechanical Model and Reliability


Stochastic Process

Gaussian Process

Barrier Crossing

Peak Distribution

Fatigue Reliability

SN Curve and Fatigue Damage

Estimate of Cumulative Damage

(Linear Damage Hypothesis)

Design SN Curves

Fatigue Assessment Using Discrete Wave Approach

Simplified Fatigue Assessment Method

Spectral Fatigue Analysis of Offshore Structures

Short-Term Fatigue Damage

Uncertainties in Fatigue Reliability

Lognormal Format for Fatigue Reliability

Tubular Joints: Experimental and Analytical


Fatigue Life Estimate of Tubular Joints

Behavior of T Joints under Axial Loads

T Joint under out-of-Plane Bending

K Joints under Axial Loading

Risk Assessment


Quantified Risk Assessment

Hazard Identification

Hazard and Operability

HaZop Study Process

Parameters for HaZop Study

HaZop: Advantages and Limitations

Logical Risk Analysis

Failure Mode and Effect Analysis

Fault Tree and Event Tree

Fault Tree Analysis

Event Tree Analysis

Cause–Consequence Analysis

Decision Trees

Consequence Analysis

Limitations of QRA

Risk Acceptance Criteria

Risk and Hazard Assessment

Hazard Identification

Selection of Failure Scenarios

Fire and Thermal Radiation

Selection of Damage Criteria

Risk Picture

Individual Risk

Societal Risk

Risk Assessment and Management

Example Problem of Risk

Assessment: Offshore Triceratops

Model Exercise Papers


About the Author

Srinivasan Chandrasekaran is a professor in the Department of Ocean Engineering, Indian Institute of Technology Madras, India. He has more than 25 years of teaching, research, and industrial experience. By invitation of the Ministry of Italian University Research, he was a visiting fellow to the University of Naples Federico II, Italy, for a period of two years. He has published approximately 140 research papers. He is a member of many national and international professional bodies and has delivered many invited lectures and keynote addresses at international conferences, workshops, and seminars organized in India and abroad.

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