Book contents
- Frontmatter
- Contents
- Preface
- Acknowledgments
- How to Use This Book
- 1 Overview of Ship-Shaped Offshore Installations
- 2 Front-End Engineering
- 3 Design Principles, Criteria, and Regulations
- 4 Environmental Phenomena and Application to Design
- 5 Serviceability Limit-State Design
- 6 Ultimate Limit-State Design
- 7 Fatigue Limit-State Design
- 8 Accidental Limit-State Design
- 9 Topsides, Mooring, and Export Facilities Design
- 10 Corrosion Assessment and Management
- 11 Inspection and Maintenance
- 12 Tanker Conversion and Decommissioning
- 13 Risk Assessment and Management
- Appendix 1 Terms and Definitions
- Appendix 2 Scale Definitions of Winds, Waves, and Swells
- Appendix 3 Probability of Sea States at Various Ocean Regions
- Appendix 4 Scaling Laws for Physical Model Testing
- Appendix 5 Wind-Tunnel Test Requirements
- Appendix 6 List of Selected Industry Standards
- Index
- References
8 - Accidental Limit-State Design
Published online by Cambridge University Press: 17 September 2009
- Frontmatter
- Contents
- Preface
- Acknowledgments
- How to Use This Book
- 1 Overview of Ship-Shaped Offshore Installations
- 2 Front-End Engineering
- 3 Design Principles, Criteria, and Regulations
- 4 Environmental Phenomena and Application to Design
- 5 Serviceability Limit-State Design
- 6 Ultimate Limit-State Design
- 7 Fatigue Limit-State Design
- 8 Accidental Limit-State Design
- 9 Topsides, Mooring, and Export Facilities Design
- 10 Corrosion Assessment and Management
- 11 Inspection and Maintenance
- 12 Tanker Conversion and Decommissioning
- 13 Risk Assessment and Management
- Appendix 1 Terms and Definitions
- Appendix 2 Scale Definitions of Winds, Waves, and Swells
- Appendix 3 Probability of Sea States at Various Ocean Regions
- Appendix 4 Scaling Laws for Physical Model Testing
- Appendix 5 Wind-Tunnel Test Requirements
- Appendix 6 List of Selected Industry Standards
- Index
- References
Summary
Introduction
As discussed in Chapters 3 and 5, limit states are classified into four categories: serviceability limit states (SLS), ultimate limit states (ULS), fatigue limit states (FLS), and accidental limit states (ALS). This chapter presents ALS design principles and criteria together with some related practices applicable for ship-shaped offshore units.
ALS potentially leads to a threat of serious injury or loss of life, pollution, damage, and loss of property or significant financial expenditure. The intention of ALS design is to ensure that the structure is able to tolerate specified accidental events and, when accidents occur, subsequently maintains structural integrity for a sufficient period under specified (usually reduced) environmental conditions to enable the following risk mitigation and recovery measures to take place, as relevant:
Evacuation of personnel from the structure
Control of undesirable movement or motion of the structure
Temporary repairs
Safe refuge and firefighting in the case of fire and explosion
Minimizing outflow of cargo or other hazardous material
Different types of accidental events may require different methodologies or different levels of refinement of the same methodology to analyze structural resistance or capacity during and following such events (demands). The ALS design is then necessarily an important part of design and operation in terms of risk assessment and management that consists of hazard identification, structural evaluation, and mitigation measure development for specific types of accidents, as we describe in Chapter 13.
- Type
- Chapter
- Information
- Ship-Shaped Offshore InstallationsDesign, Building, and Operation, pp. 257 - 317Publisher: Cambridge University PressPrint publication year: 2007
References
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