Structural bearings and expansion joints for bridges
Structural Bearings and Expansion Joints for Bridges
Günter Ramberger; Professor, Technical University, Vienna, Austria
89 pages and 131 illustrations, in English
Format: 170 x 240 mm
ISBN 3857481056
Published: May 2002
This book is aimed at both students and practicing engineers, working in the field of bridge design, construction, analysis, inspection maintenance and repair.
Contents
Bridge superstructures have to be designed to permit thermal and live load strains to occur without unintended restraints. Bridge bearings have to transfer forces from the superstructure to the substructure, allowing all movements in directions defined by the designer. The two functions - transfer the loads and allow movements only in the required directions for a long service time with little maintenance - are not so easy to fulfill. Different bearings for different purposes and requirements have been developed so, that the bridge designer can choose the most suitable bearing.
By the movement of a bridge, gaps are necessary between superstructure and substructure. Expansion joints fill the gaps, allowing traffic loads to be carried and allowing all expected displacements with low resistance. Expansion joints should provide a smooth transition, avoid noise emission as far as possible and withstand all mechanical actions and chemical attacks (de-icing) for a long time. A simple exchange of all wearing parts and of the entire expansion joint should be possible.
The present volume provides a comprehensive survey of arrangement, construction and installation of bearings and expansion joints for bridges including calculation of bearing reactions and movements, analysis and design, inspection and maintenance. A long list of references deals with the subjects but also with aspects in the vicinity of bearings and expansion joints.
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Posted by: ascetic19 - 12-30-2009, 07:34 AM - Forum: Archive
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Steel Structures: Controlling Behavior Through Design
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In 1988 the American Institute of Steel Construction changed the method from Allowable Stress Design (ASD) to Load Resistance Factor Design (LRFD) on which the building code is based. This text develops a treatment of steel which is behavior-oriented and explains the causation for the LRFD approach. Focuses on creating cost-effective solutions for designing situations efficiently; discusses problems engineers must face on a regular basis; and offers insight into potential areas of concern. Also covers earthquake resistant design procedure. Includes over 400 drawings and 36 photos.
Table of Contents;
* Steel: Material Properties and Design.
* The Flexural Behavior of Stable Beam Systems.
* Stability.
* Behavior of Bracing Systems.
* Developing the Design of a Ductile Frame.
* The Artistic Aspects of Structural Engineering.
* Index.
Slope Stability and Erosion Control: Ecotechnological Solutions
Slope Stability and Erosion Control: Ecotechnological Solutions
Norris, J.E.; Stokes, A.; Mickovski, S.B.; Cammeraat, E.; van Beek, R.; Nicoll, B.C.; Achim, A. (Eds.)
2008, VI, 290 p., Hardcover
ISBN: 978-1-4020-6675-7
Descriptions:
This book is designed to assist the civil and geotechnical engineer, geomorphologist, forester, landscape architect or ecologist in choosing ecotechnological solutions for slopes that are prone to a variety of mass movements e.g. shallow failure or erosion. Within this book, the ‘engineer’ is used in the global sense to encompass all planners, designers, etc who are involved in the stabilisation of slopes. We review the types of problematic slopes that may occur and describe briefly the nature of mass movements and the causes of these movements. In this book, we focus on the use of vegetation to stabilize soil on slopes prone to mass movements. Before a plant can be chosen for a particular function, its physical and hydrological properties must be determined, thus the root architecture of grasses, shrubs and trees are described and the soil hydrological and mechanical factors which influence vegetation are discussed. Depending on the use of the slope, the engineer may wish to ascertain either the stability of the slope or the mechanical stability of the vegetation or both, therefore slope stability analysis methods are reviewed and the contribution the vegetation has to the stability of the slope are explained. Models to assess the mechanical stability of vegetation are reviewed. This book also introduces new ecotechnological methods for stabilising active rockfalls on steep slopes and slopes that are prone to soil erosion following wild fires, as well as providing user friendly information on traditional ground bio-engineering techniques and tables of plants suitable for different functions. Case studies where ground bio- and eco-engineering measures have been put into practice are also discussed.
Written for:
Research scientists, postgraduate level students and managers working in the areas of slope stability, landslide mitigation techniques, erosion control, forestry, ecotechnology and environmental protection
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A program for removing PDF protections.
Compatible with: 95/98/ME/NT/2000/XP/2003/Vista/Windows7
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There is a (simple) way to convert extension DJVU in to PDF but if you do so in some cases PDF e-book will be a bit or "few times a bit" larger than DJVU format.
To convert DJVU in to PDF I use IrfanView program. Just open DJVU file using IrfanView and go File -- > Save as and from the list Save file as select PDF - Portable Document Format, click Save, wait few seconds and this is it...
Here are two links where you can find IrfanView program:
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Linking London:
The Millennium Bridge
by:
Tony Fitzpatrick FREng
Pat Dallard
Sophie Le Bourva
Angus Low
Roger Ridsdill Smith
Michael Willford
This paper describes the structure of the London Millennium Footbridge.
The bridge opened on the 10th June 2000. During the opening day unexpected lateral movements occurred as pedestrians crossed the bridge. The paper describes the events of opening day and goes on to describe the research and analysis that was carried out as a result of these movements.
The lateral force exerted by pedestrians on the moving deck surface is found to be related to the velocity of the moving surface. The paper quantifies this relationship. The results show that the phenomenon is not related to the technical innovations of the bridge and that the same phenomenon could occur on any bridge with a lateral frequency below around 1.3Hz loaded with a sufficient number of pedestrians. A selection of other bridges, including one roadbridge found to have exhibited the same phenomenon, are listed.
No evidence of the same effect was detected vertically; a proposal for a vertical pedestrian crowd load model is made using random vibration theory.
Finally, the modification works being carried out on the bridge to reduce these movements
are described
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5) DESIGN CONSIDERATIONS FOR AIRCRAFT BRIDGES - JOURNAL OF BRIDGE ENGINEERING / NOVEMBER/DECEMBER 2001
6) ERECTION OF CABLE-STAYED BRIDGES HAVING COMPOSITE DECKS WITH PRECAST CONCRETE SLABS - JOURNAL OF BRIDGE ENGINEERING / SEPTEMBER/OCTOBER 2001
7) EXPERIMENTAL VERIFICATION OF HORIZONTALLY CURVED I-GIRDER BRIDGE BEHAVIOR - JOURNAL OF BRIDGE ENGINEERING / NOVEMBER 2000
8) FINITE ELEMENT ANALYSIS OF STEEL GIRDER HIGHWAY BRIDGES - JOURNAL OF BRIDGE ENGINEERING / AUGUST 1997
9) FINITE-ELEMENT MODEL UPDATING FOR THE KAP SHUI MUN CABLE-STAYED BRIDGE - JOURNAL OF BRIDGE ENGINEERING / JULY/AUGUST 2001
10) INELASTIC DESIGN OF STEEL I-GIRDER BRIDGES - JOURNAL OF BRIDGE ENGINEERING / AUGUST 2000
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By Peter W. Christensen, A. Klarbring"An introduction to structural optimization (Solid Mechanics and Its Applications)"
Publisher: Springer | Pages: 220 | 2008-11-01 | ISBN: 1402086652 | PDF | 3.5 MB
This textbook gives an introduction to all three classes of geometry optimization problems of mechanical structures: sizing, shape and topology optimization. The style is explicit and concrete, focusing on problem formulations and numerical solution methods. The treatment is detailed enough to enable readers to write their own implementations. On the book's homepage, programs may be downloaded that further facilitate the learning of the material covered.
The mathematical prerequisites are kept to a bare minimum, making the book suitable for undergraduate, or beginning graduate, students of mechanical or structural engineering. Practicing engineers working with structural optimization software would also benefit from reading this book.
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