Download or read book Simplified Methods of Evaluating the Redundancy of Twin Trapezoidal Box Girder Bridges written by Vasileios Samaras and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: According to the AASHTO Load and Resistance Factor Design (LRFD) Bridge Design Specifications, a bridge is defined to be fracture critical when a failure of a tension component will result in the collapse of the bridge. In the case of a twin box girder bridge, the tension flanges in the positive moment portion of the bridge, as well as the webs, are considered to be fracture critical elements. Due to this classification, those bridges are subjected to stringent inspections at least every two years. Those inspections are crucial for ensuring the safety of the bridge, yet are expensive and time consuming. Multiple cases of FCBs (Fracture Critical Bridge) that have experienced a fracture in one of their elements without collapse have encouraged owners of those bridges to question the validity of AASHTO's requirements. The Texas Department of Transportation is interested in indentifying when a fracture of an element could lead to a catastrophic collapse of a bridge. A better understanding of fracture critical bridge behavior may allow TxDOT and other state DOTs to reduce the frequency of the inspections, which could potentially reduce the cost of an otherwise attractive bridge design. The goal of this research project is to determine the level of redundancy of twin box girder bridges. Simplified analytical methods and guidelines that will conservatively estimate the behavior of such bridges will be presented in this thesis. Those guidelines will be one of the tools that an engineer in practice could use to determine if a bridge is prone to collapse following the failure of a fracture critical component. A full-size bridge has been constructed at the Ferguson Structural Engineering Laboratory to test the response of these systems following a simulated fracture. A series of tests were conducted to determine the response of the bridge in the event of a tension flange fracture. The results provided important information for the development of the simplified methods. The FSEL test bridge performed extremely well throughout all the testing and supported a load of over four times the AASHTO design truck load. Several elements contributed to create alternative load paths that could sustain the entire applied load with a full-depth fracture of one of its two girders. The large section of the concrete railing above the fractured girder acted as an inverted beam and transmitted a portion of the load back to the supports once the expansion joint closed due to the downward deflection of the bridge. The concrete deck acted as a shear diaphragm and also transferred significant loads in both horizontal directions. Because the performance of the test bridge far exceeded the AASHTO criteria, and because this behavior can be computed using the simplified methods presented in this thesis as well as through detailed finite element models, consideration should be given to revising the current AASHTO specifications and to developing alternate inspection and maintenance requirements that accurately reflect the redundancy available in various types of fracture critical bridges.
Download or read book Edward Hillyer written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluating the Redundancy of Steel Bridges written by Bryce Jacob Neuman and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural Redundancy of Twin Steel Box Girder Bridges written by Charles Anthony Hunley and published by . This book was released on 2008 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simplified Analysis of Curved Box girder Bridges written by Douglas Paul Gauvreau and published by . This book was released on 1983 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Steel Box Girder Bridges written by and published by Thomas Telford Publishing. This book was released on 1973 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to Scientific Technical Proceedings written by and published by . This book was released on 1978-07 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monthly, with annual cumulation. Published conference literature useful both as current awareness and retrospective tools that allow searching by authors of individual papers as well as by editors. Includes proceedings in all formats, i.e., books, reports, journal issues, etc. Complete bibliographical information for each conference proceedings appears in section titled Contents of proceedings, with accompanying category, permuterm subject, sponsor, author/editor, meeting location, and corporate indexes. Contains abbreviations used in organizational and geographical names.
Download or read book Steel concrete Composite Bridges written by David Collings and published by Thomas Telford. This book was released on 2005 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Steel-concrete composite bridges shows how to choose the bridge form and design element sizes to enable the production of accurate drawings and also highlights a wide and full range of examples of the design and construction of this bridge type."--Jacket.
Download or read book LRFD Guide Specifications for the Design of Pedestrian Bridges written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 2009 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bridge Engineering Handbook written by Wai-Fah Chen and published by CRC Press. This book was released on 2019-09-11 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: First Published in 1999: The Bridge Engineering Handbook is a unique, comprehensive, and state-of-the-art reference work and resource book covering the major areas of bridge engineering with the theme "bridge to the 21st century."
Download or read book The Design of Modern Steel Bridges written by Sukhen Chatterjee and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridges are great symbols of mankind’s conquest of space. They are a monument to his vision and determination, but these alone are not enough. An appreciation of the mathematical theories underlying bridge design is essential to resist the physical forces of nature and gravity. The object of this book is to explain firstly the nature of the problems associated with the building of bridges with steel as the basic material, and then the theories that are available to tackle them. The book covers: a technological history of the different types of iron and steel bridges the basic properties of steel loads on bridges from either natural or traffic-induced forces the process and aims of design based on limit state and statistical probability concepts buckling behaviour of various components and large-deflection behaviour of components with initial imperfections detailed guidance on the design of plate and box girder bridges together with some design examples The Second Edition includes a completely new chapter on the history and design of cable-stayed bridges, the various types of cable used for them and their method of construction, and it addresses many of the changes introduced in the latest version of the British Standard Design Code for steel bridges, BS 5400: Part 3:2000.
Download or read book AASHTO Guide Specifications for LRFD Seismic Bridge Design written by and published by AASHTO. This book was released on 2011 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work offers guidance on bridge design for extreme events induced by human beings. This document provides the designer with information on the response of concrete bridge columns subjected to blast loads as well as blast-resistant design and detailing guidelines and analytical models of blast load distribution. The content of this guideline should be considered in situations where resisting blast loads is deemed warranted by the owner or designer.
Download or read book Design of Steel Concrete Composite Bridges to Eurocodes written by Ioannis Vayas and published by CRC Press. This book was released on 2013-08-29 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design of Steel-Concrete Composite Bridges to Eurocodes centers on the new design rules incorporated in the EN-versions of the Eurocodes. This book targets students, especially at MSc level, and practicing engineers who need to become familiar with the new design rules incorporated in the EN-versions of the Eurocodes. Its focuses primarily on road bridges, although some information is provided for railway bridges, and presents the material in a concise manner.
Download or read book Design of Highway Bridges written by Richard M. Barker and published by John Wiley & Sons. This book was released on 2013-02-04 with total page 1194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Up-to-date coverage of bridge design and analysis revised to reflect the fifth edition of the AASHTO LRFD specifications Design of Highway Bridges, Third Edition offers detailed coverage of engineering basics for the design of short- and medium-span bridges. Revised to conform with the latest fifth edition of the American Association of State Highway and Transportation Officials (AASHTO) LRFD Bridge Design Specifications, it is an excellent engineering resource for both professionals and students. This updated edition has been reorganized throughout, spreading the material into twenty shorter, more focused chapters that make information even easier to find and navigate. It also features: Expanded coverage of computer modeling, calibration of service limit states, rigid method system analysis, and concrete shear Information on key bridge types, selection principles, and aesthetic issues Dozens of worked problems that allow techniques to be applied to real-world problems and design specifications A new color insert of bridge photographs, including examples of historical and aesthetic significance New coverage of the "green" aspects of recycled steel Selected references for further study From gaining a quick familiarity with the AASHTO LRFD specifications to seeking broader guidance on highway bridge design Design of Highway Bridges is the one-stop, ready reference that puts information at your fingertips, while also serving as an excellent study guide and reference for the U.S. Professional Engineering Examination.
Download or read book Design of Plated Structures written by Darko Beg and published by John Wiley & Sons. This book was released on 2012-01-09 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main aim of this book is to provide practical advice to designers of plated structures for correct and efficient application of EN 1993-1-5 design rules. In chapter 1 the purpose, the scope and the structure of the book is explained. In chapter 2 a rather detailed and commented overview of EN 1993-1-5 design rules is given following the structure of the standard. Shear lag effect as well as plate buckling problems due to direct stresses, shear forces, transverse forces and interactions of these effects are covered. This chapter also includes a reduced stress method and a finite element analysis approach to plate buckling problems. A large number of design examples illustrate the proper application of individual design rules. Chapter 3 and 4 bring two complete design examples on a crane runway and a box-girder bridge.
Download or read book Modern Robotics written by Kevin M. Lynch and published by Cambridge University Press. This book was released on 2017-05-25 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modern and unified treatment of the mechanics, planning, and control of robots, suitable for a first course in robotics.
Download or read book Building Economics Theory and Practice written by Rosalie Ruegg and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: We no longer build buildings like we used to nor do we pay for them in the same way. Buildings today are no longer only shelter but are also life support systems, communication terminals, data manufacturing centers, and much more. Buildings are incredibly expensive tools that must be constantly adjusted to function efficiently. The economics of building has become as complex as its design. When buildings were shelter they lasted longer than their builders. The av erage gothic master mason lived 35 or 40 years. Cathedrals took 3 or 4 hundred years to build. Cost estimates were verified by great great grandchildren of the original designer. Today, creative economics has become as important as creative design and creative building. The dient brings builder, contractor, architect, and facilities manager to account in their life time. The cost of building can therefore no longer be left to chance or act of god. Solutions are no longer as ingeniously simple as those proposed by a Flor entine builder early in the 15th century. He proposed to center the dome of S. Maria deI Fiore on a great mound of earth mixed with pennies. When the job was done street urchins would carry away the dirt in their search for the pennies. This was a serious suggestion offered by an early construction manager before Brunelleschi solved the problem more sensibly.
