Sinossi
Any structural system in service is subject to age-related deterioration, leading to potential concerns regarding maintenance, health & safety, environmental and economic implications. Condition Assessment of Aged Structures is an invaluable, single source of information on structural assessment techniques for marine and land-based structures such as ships, offshore installations, industrial plant and buildings. Topics covered include:
- Current practices and standards for structural condition assessment
- Fundamental mechanisms and advanced mathematical methods for predicting structural deterioration
- Residual strength assessment of deteriorated structures
- Inspection and maintenance of aged structures
- Reliability and risk assessment of aged structures
Professionals from a broad range of disciplines will be able to gain a better understanding of current practices in the field, how to apply the latest advanced design and development technologies in condition assessment, and what future trends might be.
Le informazioni nella sezione "Riassunto" possono far riferimento a edizioni diverse di questo titolo.
Contenuti
PART 1. CURRENT PRACTICES
Current Practices in Condition Assessment of Aged Ships and Floating Offshore Structures, G Wang, C Serratella and S Kalghatgi, American Bureau of Shipping (ABS), USA
Introduction
International association of classification societies (IACS) and vessel inspections by classification societies
International maritime organization (IMO), flag and port states
Industry self-regulation and voluntary inspections
Design, maintenance, inspection and repair of ship structures
Design, maintenance, inspection and repair of floating offshore structures
Nondestructive examination and monitoring
Challenges and future trends
Sources of further information and advice
Acknowledgement
References
Appendix: abbreviations used in this chapter
Current Practices in Condition Assessment of Aged Fixed-Type Offshore Structures, I Lotsberg, Det Norske Veritas (DNV), Norway
Introduction
Design standards and acceptance criteria for assessment
Process for structural assessment
Collection of data from design, fabrication, transportation, installation and from in-service life
Assessment of data and structural analyses
Mitigation
Future trends
Sources for further information and advice
References
Definition and Assessment of Deficiencies in Building Construction, A van Grieken, Connell Wagner Pty Ltd, Australia
Historical perspective
History of global construction developments
The Australian experience
The benefit of the historical perspective
General causes of deficiencies
The three types of deficiencies: deterioration, defect and damage
Assessment of deficiencies
References
PART 2. MECHANISMS, MATHEMATICAL MODELS AND PREVENTIVE MEASURES FOR AGE RELATED DETERIORATION
Corrosion Wastage in Aged Structures, R E Melchers, The University of Newcastle, Australia
Introduction
Some fundamental corrosion principles
A model based on fundamentals
Environmental and other influences
Variability and probabilistic models
Some other corrosion loss models
Coastal atmospheric corrosion
Inland atmospheric corrosion
Pitting corrosion
Discussion
Conclusions
Acknowledgement
References
Fatigue Cracking in Aged Structures, W C Cui, China Ship Scientific Research Center, China
Introduction
Historical overview of metal fatigue
Current understanding of fatigue mechanisms
Fatigue life prediction methods
Preventive measures of fatigue cracking
Conclusions
References
Local Denting and Other Deterioration in Aged Structures, N Yamamoto, Research Institute of Nippon Kaiji Kyokai, Japan
Introduction
Local deformed damage caused by mechanical external causes
Local deformed damage caused by corrosion
Conclusions
References
PART 3. RESIDUAL STRENGTH OF AGED STRUCTURES
Corroded Structures and Residual Strength, T Nakai and N Yamamoto, Research Institute of Nippon Kaiji Kyokai, Japan
Introduction
Probabilistic modeling of corrosion
Degradation of hull girder strength
Pitting corrosion
Equivalent thickness of plates with pitting corrosion
Conclusions
References
Cracked Structures and Residual Strength, F Wang and W C Cui, China Ship Scientific Research Center, China
Fundamentals of residual strength of cracked structures
Residual ultimate strength of cracked plates
Plates with a single crack under ultimate tensile loads
Plates with a single crack under ultimate compressive loads
Residual strength of plates with multiple collinear cracks
Random cracks
Ultimate strength of cracked stiffened panels
Ultimate strength of cracked ship hull girder
Conclusions
References
Dented Structures and Residual Strength, J K Paik, Pusan National University, Korea
Introduction
Mechanism of local denting damage
Residual ultimate strength characteristics of dented plates
Methods of damage detection and their uncertainties
Conclusions
References
PART 4. RELIABILITY OF AGED STRUCTURES
Reliability of Aged Ship Structures, Y Garbatov and C Guedes Soares, Technical University of Lisbon, Portugal
Introduction
Time dependent hull section modulus subject to crack growth
Effect of corrosion on the hull section modulus
Time dependent section modulus of a hull with cracks and corrosion
Time dependent reliability of the ship hull girder
Modelling crack inspections and reliability
Modelling corrosion inspection and reliability
Time dependent reliability of ship hull subjected to fatigue and corrosion failure
Numerical example
Discussion and conclusions
Acknowledgments
References
Reliability of Aged Offshore Structures, T Moan, Norges Teknisk-Naturvitenskapelige Universitet (NTNU), Norway
Introduction
Current design practice for offshore structures
Inspection and maintenance of offshore structures
Concluding remarks on component design criteria
System failure criteria for offshore structures
General description of uncertainty modelling
Load effects on offshore structures
Structural reliability analysis
Fatigue reliability
System reliability
Updating variables in reliability analysis
Decision making during design and in service
Target safety level
Improving the reliability of offshore structures
Conclusions
References
Reliability of Aged Land-Based Structures, R E Melchers, The University of Newcastle, Australia
Introduction
Components in structural reliability
Outline of structural reliability theory
Structural systems reliability
General approach
Deteriorating structures
Conclusion
References
PART 5. INSPECTION AND MAINTENANCE
Inspection of Aged Ships and Offshore Structures, C M Rizzo, University of Genova, Italy
Reasons for inspections
The inspection event
Current inspection practices
Detection and sizing methods
Structural monitoring
Acknowledgement
References
Inspection of Aged Land-Based Structures, A van Grieken, Connell Wagner Pty Ltd, Australia
Introduction
Six reasons for assessment
Assessment outcome and sequence
Concrete structures
Masonry structures
Steel structures
References
Maintenance of Aged Ships and Offshore Structures, C M Rizzo, University of Genova, Italy
Maintenance strategies
Current maintenance and repair practices
Temporary repairs
Permanent repairs
Examination and testing of repairs
References
Maintenance of Aged Land-Based Structures, A van Grieken, Connell Wagner Pty Ltd, Australia
A structured approach
Key considerations
Documentation
Site phase of the works
Repair and protection of concrete structures
Brickgrowth repairs
Repair of metal structures
References
Risk-Based Inspection and Maintenance of Aged Structures, C Serratella, G Wang and K Tikka, American Bureau of Shipping (ABS), USA
Introduction
Risk based aapproaches
Fundamentals of risk based approaches
Risk based inspection (RBI)
Risk based maintenance (RBM)
Risk based repairs (RBR)
Future trends
References
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