Safety And Performance Concept Reliability Assessment Of Concrete Structures
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Safety And Performance Concept Reliability Assessment Of Concrete Structures
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Author : fib Fédération internationale du béton
language : en
Publisher: FIB - Féd. Int. du Béton
Release Date : 2018-08-01
Safety And Performance Concept Reliability Assessment Of Concrete Structures written by fib Fédération internationale du béton and has been published by FIB - Féd. Int. du Béton this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-08-01 with Technology & Engineering categories.
Concrete structures have been built for more than 100 years. At first, reinforced concrete was used for buildings and bridges, even for those with large spans. Lack of methods for structural analysis led to conservative and reliable design. Application of prestressed concrete started in the 40s and strongly developed in the 60s. The spans of bridges and other structures like halls, industrial structures, stands, etc. grew significantly larger. At that time, the knowledge of material behaviour, durability and overall structural performance was substantially less developed than it is today. In many countries statically determined systems with a fragile behavior were designed for cast in situ as well as precast structures. Lack of redundancy resulted in a low level of robustness in structural systems. In addition, the technical level of individual technologies (e.g. grouting of prestressed cables) was lower than it is today. The number of concrete structures, including prestressed ones, is extremely high. Over time and with increased loading, the necessity of maintaining safety and performance parameters is impossible without careful maintenance, smaller interventions, strengthening and even larger reconstructions. Although some claim that unsatisfactory structures should be replaced by new ones, it is often impossible, as authorities, in general, have only limited resources. Most structures have to remain in service, probably even longer than initially expected. In order to keep the existing concrete structures in an acceptable condition, the development of methods for monitoring, inspection and assessment, structural identification, nonlinear analysis, life cycle evaluation and safety and prediction of the future behaviour, etc. is necessary. The scatter of individual input parameters must be considered as a whole. This requires probabilistic approaches to individual partial problems and to the overall analysis. The members of the fib Task Group 2.8 “Safety and performance concepts” wrote, on the basis of the actual knowledge and experience, a comprehensive document that provides crucial knowledge for existing structures, which is also applicable to new structures. This guide to good practice is divided into 10 basic chapters dealing with individual issues that are critical for activities associated with preferably existing concrete structures. Bulletin 86 starts with the specification of the performance-based requirements during the entire lifecycle. The risk issues are described in chapter two. An extensive part is devoted to structural reliability, including practical engineering approaches and reliability assessment of existing structures. Safety concepts for design consider the lifetime of structures and summarise safety formats from simple partial safety factors to develop approaches suitable for application in sophisticated, probabilistic, non-linear analyses. Testing for design and the determination of design values from the tests is an extremely important issue. This is especially true for the evaluation of existing structures. Inspection and monitoring of existing structures are essential for maintenance, for the prediction of remaining service life and for the planning of interventions. Chapter nine presents probabilistically-based models for material degradation processes. Finally, case studies are presented in chapter ten. The results of the concrete structures monitoring as well as their application for assessment and prediction of their future behaviour are shown. The risk analysis of highway bridges was based on extensive monitoring and numerical evaluation programs. Case studies perfectly illustrate the application of the methods presented in the Bulletin. The information provided in this guide is very useful for practitioners and scientists. It provides the reader with general procedures, from the specification of requirements, monitoring, assessment to the prediction of the structures’ lifecycles. However, one must have a sufficiently large amount of experimental and other data (e.g. construction experience) in order to use these methods correctly. This data finally allows for a statistical evaluation. As it is shown in case studies, extensive monitoring programs are necessary. The publication of this guide and other documents developed within the fib will hopefully help convince the authorities responsible for safe and fluent traffic on bridges and other structures that the costs spent in monitoring are first rather small, and second, they will repay in the form of a serious assessment providing necessary information for decision about maintenance and future of important structures.
Nbs Special Publication
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Author :
language : en
Publisher:
Release Date : 1968
Nbs Special Publication written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Weights and measures categories.
Safety And Performance Concepts Contributions To The Workshop Sessions Model Uncertainties New Concepts And Full Scale Testing
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Author : FIB – International Federation for Structural Concrete
language : en
Publisher: FIB - International Federation for Structural Concrete
Release Date : 1993-08-01
Safety And Performance Concepts Contributions To The Workshop Sessions Model Uncertainties New Concepts And Full Scale Testing written by FIB – International Federation for Structural Concrete and has been published by FIB - International Federation for Structural Concrete this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-08-01 with Technology & Engineering categories.
Proceedings Fib Symposium In Stuttgart
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Author : FIB – International Federation for Structural Concrete
language : en
Publisher: FIB - Féd. Int. du Béton
Release Date : 2008-09-01
Proceedings Fib Symposium In Stuttgart written by FIB – International Federation for Structural Concrete and has been published by FIB - Féd. Int. du Béton this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-09-01 with Technology & Engineering categories.
Partial Factor Methods For Existing Concrete Structures
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Author : FIB - Féd. Int. du Béton
language : en
Publisher: FIB - Féd. Int. du Béton
Release Date : 2016
Partial Factor Methods For Existing Concrete Structures written by FIB - Féd. Int. du Béton and has been published by FIB - Féd. Int. du Béton this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Technology & Engineering categories.
For a large part of the existing buildings and infrastructure the design life has been reached or will be reached in the near future. These structures might need to be reassessed in order to investigate whether the safety requirements are met. Current practice on the assessment of existing concrete structures however needs a thorough evaluation from a risk and reliability point of view, as they are mostly verified using simplified procedures based on the partial factor method commonly applied in design of new structures. Such assessments are often conservative and may lead to expensive upgrades. Although the last decades reliability-based assessment of existing concrete structures has gained wide attention in the research field, a consistent reliability-based assessment framework and a practically applicable codified approach which is compatible with the Eurocodes and accessible for common structural engineering problems in everyday practice is currently missing. Such an approach however allows for a more uniform, more objective and probably more widely applied assessment approach for existing concrete structures. Hence, in this bulletin two different partial factor formats are elaborated, i.e. the Design Value Method (DVM) and the Adjusted Partial Factor Method (APFM), enabling the incorporation of specific reliability related aspects for existing structures. The DVM proposes a fundamental basis for evaluating partial factors whereas the APFM provides adjustment factors to be applied on the partial factors for new structures in EN 1990. In this bulletin both methods are elaborated and evaluated and a basis is provided for decision making regarding the target safety level of existing structures.
Publications Of The National Bureau Of Standards
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Author : United States. National Bureau of Standards
language : en
Publisher:
Release Date : 1985
Publications Of The National Bureau Of Standards written by United States. National Bureau of Standards and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Government publications categories.
Reinforced Concrete
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Author : B.S. Choo
language : en
Publisher: CRC Press
Release Date : 2018-10-08
Reinforced Concrete written by B.S. Choo and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-10-08 with Architecture categories.
This new edition of a highly practical text gives a detailed presentation of the design of common reinforced concrete structures to limit state theory in accordance with BS 8110.
Safety And Security Engineering Vii
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Author : Lombardi, M.
language : en
Publisher: WIT Press
Release Date : 2018-01-29
Safety And Security Engineering Vii written by Lombardi, M. and has been published by WIT Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-01-29 with Architecture categories.
Papers presented at the 7th in a series of interdisciplinary conferences on safety and security engineering are contained in this book. The papers include the work of engineers, scientists, field researchers, managers and other specialists involved in one or more of the theoretical and practical aspects of safety and security. Safety and Security Engineering, due to its special nature, is an interdisciplinary area of research and application that brings together in a systematic way, many disciplines of engineering, from the traditional to the most technologically advanced. This volume covers topics such as crisis management, security engineering, natural and man-made disasters and emergencies, risk management, and control, protection and mitigation issues. Specific themes include: Risk analysis, assessment and management; System safety engineering; Incident monitoring; Information and communication security; Disaster management; Emergency response; Critical infrastructure protection; Counter terrorism issues; Human factors; Transportation safety and security; Modelling and experiments; Security surveillance systems; Cyber security / E security; Loss prevention; BIM in Safety and Security.
Publications Of The National Bureau Of Standards Catalog
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Author : United States. National Bureau of Standards
language : en
Publisher:
Release Date : 1978
Publications Of The National Bureau Of Standards Catalog written by United States. National Bureau of Standards and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with categories.
Civil And Environmental Engineering Concepts Methodologies Tools And Applications
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Author : Management Association, Information Resources
language : en
Publisher: IGI Global
Release Date : 2016-01-31
Civil And Environmental Engineering Concepts Methodologies Tools And Applications written by Management Association, Information Resources and has been published by IGI Global this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-01-31 with Technology & Engineering categories.
Civil and environmental engineers work together to develop, build, and maintain the man-made and natural environments that make up the infrastructures and ecosystems in which we live and thrive. Civil and Environmental Engineering: Concepts, Methodologies, Tools, and Applications is a comprehensive multi-volume publication showcasing the best research on topics pertaining to road design, building maintenance and construction, transportation, earthquake engineering, waste and pollution management, and water resources management and engineering. Through its broad and extensive coverage on a variety of crucial concepts in the field of civil engineering, and its subfield of environmental engineering, this multi-volume work is an essential addition to the library collections of academic and government institutions and appropriately meets the research needs of engineers, environmental specialists, researchers, and graduate-level students.