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Wind Effects On Cable Supported Bridges

Author: You-Lin Xu
Publisher: John Wiley & Sons
ISBN: 1118188306
Size: 38.87 MB
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As an in-depth guide to understanding wind effects on cable-supported bridges, this book uses analytical, numerical and experimental methods to give readers a fundamental and practical understanding of the subject matter. It is structured to systemically move from introductory areas through to advanced topics currently being developed from research work. The author concludes with the application of the theory covered to real-world examples, enabling readers to apply their knowledge. The author provides background material, covering areas such as wind climate, cable-supported bridges, wind-induced damage, and the history of bridge wind engineering. Wind characteristics in atmospheric boundary layer, mean wind load and aerostatic instability, wind-induced vibration and aerodynamic instability, and wind tunnel testing are then described as the fundamentals of the subject. State-of-the-art contributions include rain-wind-induced cable vibration, wind-vehicle-bridge interaction, wind-induced vibration control, wind and structural health monitoring, fatigue analysis, reliability analysis, typhoon wind simulation, non-stationary and nonlinear buffeting response. Lastly, the theory is applied to the actual long-span cable-supported bridges. Structured in an easy-to-follow way, covering the topic from the fundamentals right through to the state-of-the-art Describes advanced topics such as wind and structural health monitoring and non-stationary and nonlinear buffeting response Gives a comprehensive description of various methods including CFD simulations of bridge and vehicle loading Uses two projects with which the author has worked extensively, Stonecutters cable-stayed bridge and Tsing Ma suspension bridge, as worked examples, giving readers a practical understanding

Wind Effects On Cable Supported Bridges

Author:
Publisher:
ISBN: 9781642241983
Size: 78.69 MB
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Cable stayed bridges have only become an established solution for long span structures over the last 60 years. This recent ascendency is primarily due to the development of reliable high strength steels for the cables and perhaps more importantly, the advent and widespread use of computers to analyze the complex mathematical models. Cable-stayed bridges are preferred these days as they provide much greater stiffness than the suspension bridge and deformations of the deck under live loads are reduced. A cable stayed bridge has one or more pylons, from which cables support the deck of the bridge. A distinctive feature of the bridge is the cables which run directly from tower to deck, normally forming a fan like pattern or a series of parallel line. The main objective of this book is to review the various wind effects and the different vibrations which are induced due to the wind on cable-stayed bridges. Cable-stayed bridges being more flexible, a proper wind study is inevitable.Wind Effects on Cable-Supported Bridges provides in-depth information to understanding wind effects on cable-stayed bridges; this book uses analytical, numerical and experimental methods to give readers a fundamental and practical understanding of the subject knowledge. It describes the structural behavior of cable-stayed bridges, identifies cable-stayed bridge elements, and discusses their role in supporting the structure. It presents methods of pre-sizing the stays and describes the mathematical procedure that allows optimal tensioning of forces in the stays, so that the structure complies with the design criteria. This book is intended to supplement information from introductory areas through to advanced topics currently being developed from research work. Cable-stayed bridges under wind loading exhibit dynamic behaviors that depend on the aero elastic forces and coupling among vibration modes.

Dynamic Wind Effects On Suspension And Cable Stayed Bridges

Author:
Publisher:
ISBN:
Size: 50.36 MB
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Abstract: Cable supported bridges are flexible structures which may be excited into oscillations by the wind. The excitation forces acting on cable supported bridges are aerodynamic by nature, but are for a large part set into play by the underlying structural dynamics of the bridge structures. The paper discusses the various types of dynamic wind effects commonly encountered for suspension and cable-stayed bridges emphasizing the importance of the structural dynamics. Highlights: This paper reviews dynamic wind effects on cable supported bridges. The importance of the structural dynamics on the wind response is emphasized. The physics of flutter, vortex shedding excitation, buffeting and galloping is discussed.

Cable Vibrations In Cable Stayed Bridges

Author: Elsa de Sá Caetano
Publisher: IABSE
ISBN: 3857481153
Size: 11.35 MB
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The present book provides a comprehensive survey on the governing phenomena of cable vibration, both associated with direct action of wind and rain: buffeting, vortex-shedding, wake effects, rain-wind vibration; and resulting from the indirect excitation through anchorage oscillation: external and parametric excitation. Methodologies for assessment of the effects of those phenomena are presented and illustrated by practical examples. Control of cable vibrations is then discussed and state-of-art results on the design of passive control devices are presented.

Cable Supported Bridges

Author: Niels J. Gimsing
Publisher: John Wiley & Sons
ISBN: 1119951879
Size: 42.38 MB
Format: PDF, ePub, Docs
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Fourteen years on from its last edition, Cable Supported Bridges: Concept and Design, Third Edition, has been significantly updated with new material and brand new imagery throughout. Since the appearance of the second edition, the focus on the dynamic response of cable supported bridges has increased, and this development is recognised with two new chapters, covering bridge aerodynamics and other dynamic topics such as pedestrian-induced vibrations and bridge monitoring. This book concentrates on the synthesis of cable supported bridges, suspension as well as cable stayed, covering both design and construction aspects. The emphasis is on the conceptual design phase where the main features of the bridge will be determined. Based on comparative analyses with relatively simple mathematical expressions, the different structural forms are quantified and preliminary optimization demonstrated. This provides a first estimate on dimensions of the main load carrying elements to give in an initial input for mathematical computer models used in the detailed design phase. Key features: Describes evolution and trends within the design and construction of cable supported bridges Describes the response of structures to dynamic actions that have attracted growing attention in recent years Highlights features of the different structural components and their interaction in the entire structural system Presents simple mathematical expressions to give a first estimate on dimensions of the load carrying elements to be used in an initial computer input This comprehensive coverage of the design and construction of cable supported bridges provides an invaluable, tried and tested resource for academics and engineers.

International Conference On Suspension Cable Supported And Cable Stayed Bridges

Author: P. Dayaratnam
Publisher: Universities Press
ISBN: 9788173712715
Size: 26.61 MB
Format: PDF
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This book comprises about 50 scientific papers presented by academicians, leading engineers, consultants and students from various disciplines of Bridge Engineering Research and Development from India and abroad. The deliberations at the International Conference covered a wide spectrum of research and development activities in the field of suspension and cable stayed bridges.

Cable Vibrations In Cable Stayed Bridges

Author: Elsa de Sá Caetano
Publisher: IABSE
ISBN: 3857481153
Size: 74.77 MB
Format: PDF, ePub
View: 2520
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The present book provides a comprehensive survey on the governing phenomena of cable vibration, both associated with direct action of wind and rain: buffeting, vortex-shedding, wake effects, rain-wind vibration; and resulting from the indirect excitation through anchorage oscillation: external and parametric excitation. Methodologies for assessment of the effects of those phenomena are presented and illustrated by practical examples. Control of cable vibrations is then discussed and state-of-art results on the design of passive control devices are presented.

Cable Supported Bridges

Author: Niels J. Gimsing
Publisher: John Wiley & Sons
ISBN: 1119951879
Size: 53.38 MB
Format: PDF, Mobi
View: 2534
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Fourteen years on from its last edition, Cable Supported Bridges: Concept and Design, Third Edition, has been significantly updated with new material and brand new imagery throughout. Since the appearance of the second edition, the focus on the dynamic response of cable supported bridges has increased, and this development is recognised with two new chapters, covering bridge aerodynamics and other dynamic topics such as pedestrian-induced vibrations and bridge monitoring. This book concentrates on the synthesis of cable supported bridges, suspension as well as cable stayed, covering both design and construction aspects. The emphasis is on the conceptual design phase where the main features of the bridge will be determined. Based on comparative analyses with relatively simple mathematical expressions, the different structural forms are quantified and preliminary optimization demonstrated. This provides a first estimate on dimensions of the main load carrying elements to give in an initial input for mathematical computer models used in the detailed design phase. Key features: Describes evolution and trends within the design and construction of cable supported bridges Describes the response of structures to dynamic actions that have attracted growing attention in recent years Highlights features of the different structural components and their interaction in the entire structural system Presents simple mathematical expressions to give a first estimate on dimensions of the load carrying elements to be used in an initial computer input This comprehensive coverage of the design and construction of cable supported bridges provides an invaluable, tried and tested resource for academics and engineers.

Cable Stayed Bridges

Author: Holger Svensson
Publisher: John Wiley & Sons
ISBN: 3433602298
Size: 57.75 MB
Format: PDF, Mobi
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The need for large-scale bridges is constantly growing due to the enormous infrastructure development around the world. Since the 1970s many of them have been cable-stayed bridges. In 1975 the largest span length was 404 m, in 1995 it increased to 856 m, and today it is 1104 m. Thus the economically efficient range of cable-stayed bridges is tending to move towards even larger spans, and cable-stayed bridges are increasingly the focus of interest worldwide. This book describes the fundamentals of design analysis, fabrication and construction, in which the author refers to 250 built examples to illustrate all aspects. International or national codes and technical regulations are referred to only as examples, such as bridges that were designed to German DIN, Eurocode, AASHTO, British Standards. The chapters on cables and erection are a major focus of this work as they represent the most important difference from other types of bridges. The examples were chosen from the bridges in which the author was personally involved, or where the consulting engineers, Leonhardt, Andr? and Partners (LAP), participated significantly. Other bridges are included for their special structural characteristics or their record span lengths. The most important design engineers are also presented.

Advances In Cable Supported Bridges

Author: Khaled Mahmoud
Publisher: CRC Press
ISBN: 1351377183
Size: 65.58 MB
Format: PDF, ePub
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Cable-supported bridges are known for their visual elegance, aesthetic appeal and ability to link long spans. The extent of issues of concern associated with these structures is commensurate with their size and vast scale. Significant advances in the technology of assessment, design, construction and maintenance of cable-supported bridges have been achieved in the past few years, due to increasing awareness, collaboration and information exchange.This book contains selected papers on cable-supported bridges as presented at the 5th International Cable-Supported Bridge Operators' Conference, held in New York City on August 28-29, 2006. It includes papers by leading international bridge engineers. Presenting state-of-the-art material, the book is an authoritative account on the developments in the field, this volume forms essential reading to anyone working on cable-supported bridges. Advances in Cable-Supported Bridges .