Cable Vibrations in Cable-stayed Bridges

Cable Vibrations in Cable-stayed Bridges
Author: Elsa de Sá Caetano (autor.)
Publisher: IABSE
Total Pages: 191
Release: 2007
Genre: Cable-stayed bridges
ISBN: 3857481153

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.

Wind Resistant Design of Bridges in Japan

Wind Resistant Design of Bridges in Japan
Author: Yozo Fujino
Publisher: Springer Science & Business Media
Total Pages: 264
Release: 2012-02-28
Genre: Technology & Engineering
ISBN: 4431540466

For long-span bridges, wind action is a dominant factor in their safety and serviceability. A large number of long-span bridges have been built in Japan over the past 30 years, and tremendous amounts of research and technical development have been accomplished in wind-resistant design. This book is a compilation of the results of active research and development. Wind-resistant design standards generated in Japan are described in the first few chapters. Then comes information such as design wind speed, structural damping, wind tunnel tests, and analyses, which provide the basis of the design standards. Wind-induced vibrations and their control of girders, towers, cables, and other features are explained with examples of field measurements. Comprehensive listings of Japanese experience in vibration control are also presented. Because achieving particularly dynamic safety against wind is still not an easy task, these data and information will be valuable assets for the wind-engineering and bridge-engineering communities.

Piezoelectric Energy Harvesting

Piezoelectric Energy Harvesting
Author: Alper Erturk
Publisher: John Wiley & Sons
Total Pages: 377
Release: 2011-04-04
Genre: Technology & Engineering
ISBN: 1119991358

The transformation of vibrations into electric energy through the use of piezoelectric devices is an exciting and rapidly developing area of research with a widening range of applications constantly materialising. With Piezoelectric Energy Harvesting, world-leading researchers provide a timely and comprehensive coverage of the electromechanical modelling and applications of piezoelectric energy harvesters. They present principal modelling approaches, synthesizing fundamental material related to mechanical, aerospace, civil, electrical and materials engineering disciplines for vibration-based energy harvesting using piezoelectric transduction. Piezoelectric Energy Harvesting provides the first comprehensive treatment of distributed-parameter electromechanical modelling for piezoelectric energy harvesting with extensive case studies including experimental validations, and is the first book to address modelling of various forms of excitation in piezoelectric energy harvesting, ranging from airflow excitation to moving loads, thus ensuring its relevance to engineers in fields as disparate as aerospace engineering and civil engineering. Coverage includes: Analytical and approximate analytical distributed-parameter electromechanical models with illustrative theoretical case studies as well as extensive experimental validations Several problems of piezoelectric energy harvesting ranging from simple harmonic excitation to random vibrations Details of introducing and modelling piezoelectric coupling for various problems Modelling and exploiting nonlinear dynamics for performance enhancement, supported with experimental verifications Applications ranging from moving load excitation of slender bridges to airflow excitation of aeroelastic sections A review of standard nonlinear energy harvesting circuits with modelling aspects.

Passive and Active Structural Vibration Control in Civil Engineering

Passive and Active Structural Vibration Control in Civil Engineering
Author: T.T. Soong
Publisher: Springer
Total Pages: 380
Release: 2014-05-04
Genre: Computers
ISBN: 3709130123

Base isolation, passive energy dissipation and active control represent three innovative technologies for protection of structures under environmental loads. Increasingly, they are being applied to the design of new structures or to the retrofit of existing structures against wind, earthquakes and other external loads. This book, with contributions from leading researchers from Japan, Europe, and the United States, presents a balanced view of current research and world-wide development in this exciting and fast expanding field. Basic principles as well as practical design and implementational issues associated with the application of base isolation systems and passive and active control devices to civil engineering structures are carefully addressed. Examples of structural applications are presented and extensively discussed.

Failed Bridges

Failed Bridges
Author: Joachim Scheer
Publisher: John Wiley & Sons
Total Pages: 345
Release: 2011-08-24
Genre: Technology & Engineering
ISBN: 343360097X

Gilt immer noch, dass ein Bauwerkseinsturz der beste Lehrmeister für den Fortschritt des Bauens ist? Oder, anders formuliert: Ist Bauen dann, wenn wir das Bewährte verlassen und Neues wagen, "Experimentieren"? Über die Ursache von Schadensfällen und Einstürzen, die oft mit dem Verlust von Menschenleben verbunden sind, wird nicht gern öffentlich gesprochen. Aber aus Fehlern kann man lernen. Die Lehren und Erfahrungen aus den Schadensauswertungen führen zu mehr Sicherheit und oft zum Innovationsschub. Die Kenntnis der Schadensursachen ist Voraussetzung für ihre zukünftige Vermeidung. Mit diesem Buch liegt eine systematische Zusammenstellung von über 400 Versagensfällen vor, die in besonderer Weise betrachtet werden: Sie werden nach dem Zeitpunkt ihres Auftretens im Lebenszyklus der Brücke, z. B. im Bauzustand oder im Betrieb, und nach den Schadensereignissen, z. B. Anprall oder Erdbeben, geordnet. Die wichtigsten Ursachen sind: menschliches Versagen, mangelnde Aussteifung, Materialversagen oder Überlastung. Es werden vorwiegend Brückeneinstürze, die in der Literatur wenig oder nach dem Urteil des Verfassers nicht vollständig oder nicht zutreffend behandelt sind, ausführlich analysiert. Mit Akribie gesammelt, kompetent und exzellent aufgearbeitet und mit Mut präsentiert, ergibt dies eine unverzichtbare Erkenntnisquelle für jeden Bauingenieur in der Praxis und für das Studium. Ein Katalog von Regeln wurde erstellt. Seine Beachtung kann helfen, Fehler bei Entwurf, Planung und Ausführung zu vermeiden.

Active Control of Structures

Active Control of Structures
Author: Andre Preumont
Publisher: John Wiley & Sons
Total Pages: 312
Release: 2008-11-20
Genre: Science
ISBN: 0470715715

With Active Control of Structures, two global pioneers present the state-of-the-art in the theory, design and application of active vibration control. As the demand for high performance structural systems increases, so will the demand for information and innovation in structural vibration control; this book provides an effective treatise of the subject that will meet this requirement. The authors introduce active vibration control through the use of smart materials and structures, semi-active control devices and a variety of feedback options; they then discuss topics including methods and devices in civil structures, modal analysis, active control of high-rise buildings and bridge towers, active tendon control of cable structures, and active and semi-active isolation in mechanical structures. Active Control of Structures: Discusses new types of vibration control methods and devices, including the newly developed reduced-order physical modelling method for structural control; Introduces triple high-rise buildings connected by active control bridges as devised by Professor Seto; Offers a design strategy from modelling to controller design for flexible structures; Makes prolific use of practical examples and figures to describe the topics and technology in an intelligible manner.

Geotechnics for Roads, Rail Tracks and Earth Structures

Geotechnics for Roads, Rail Tracks and Earth Structures
Author: A. Gomes Correia
Publisher: CRC Press
Total Pages: 300
Release: 2001-01-01
Genre: Technology & Engineering
ISBN: 9789026518447

The intent of this work is to present an international overview of advances in geotechnical engineering referring to design and construction of road pavements and rail tracks for high-speed trains. It seeks to influence the international pavement and railway engineering community to move away from merely empirical procedures towards a sophisticated approach based primarily on proven theoretical concepts.;The volume covers compaction technology in construction, properties of geomaterials relevant for design and construction, effects of grain crushing, freezing-thawing problems, and embankments for highways and high-speed trains (in-situ tests, modelling, design, monitoring and specifications). It contains 16 contributions including two special lectures: one about high embankments instead of bridges and bridge foundations in embankments, and a second one about impacts on geotechnical engineering from findings of laboratory stress-strain tests on geomaterials.

Advanced Technology in Structural Engineering

Advanced Technology in Structural Engineering
Author: Mohamed Elgaaly
Publisher:
Total Pages:
Release: 2000
Genre: Structural engineering
ISBN:

This proceedings contains the papers presented at the 2000 Structures Congress & Exposition held on May 8-10, 2000, in Philadelphia, Pennsylvania. The themes include: 14th Analysis & Computational Specialty Conference, Bridges, Buildings, Dynamics/Wind/Seismic, Steel structures, Timber/Composites/Concrete, Practical design & detailing. The goal of the Congress is to cover the advanced technology of structural engineering. Topics range from the latest research developments to practical applications of structural engineering principles.