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Preventing Cracking At Diaphragm Plate Girder Connections In Steel Bridges
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Book Synopsis Preventing Cracking at Diaphragm/plate Girder Connections in Steel Bridges by :
Download or read book Preventing Cracking at Diaphragm/plate Girder Connections in Steel Bridges written by and published by . This book was released on 1998 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some of the Iowa Department of Transportation (Iowa DOT) continuous, steel, welded plate girder bridges have developed web cracking in the negative moment regions at the diaphragm connection plates. The cracks are due to out-of-plane bending of the web near the top flange of the girder. The out-of-plane bending occurs in the "web-gap", which is the portion of the girder web between (1) the top of the fillet welds attaching the diaphragm connection plate to the web and (2) the fillet welds attaching the flange to the web. A literature search indicated that four retrofit techniques have been suggested by other researchers to prevent or control this type of cracking. To eliminate the problem in new bridges, AASHTO specifications require a positive attachment between the connection plate and the top (tension) flange. Applying this requirement to existing bridges is expensive and difficult. The Iowa DOT has relied primarily on the hole-drilling technique to prevent crack extension once cracking has occurred; however, the literature indicates that hole-drilling alone may not be entirely effective in preventing crack extension. The objective of this research was to investigate experimentally a method proposed by the Iowa DOT to prevent cracking at the diaphragm/plate girder connection in steel bridges with X-type or K-type diaphragms. The method consists of loosening the bolts at some connections between the diaphragm diagonals and the connection plates. The investigation included selecting and testing five bridges: three with X-type diaphragms and two with K-type diaphragms. During 1996 and 1997, these bridges were instrumented using strain gages and displacement transducers to obtain the response at various locations before and after implementing the method. Bridges were subjected to loaded test trucks traveling in different lanes with speeds varying from crawl speed to 65 mph (104 km/h) to determine the effectiveness of the proposed method. The results of the study show that the effect of out-of-plane loading was confined to widths of approximately 4 in. (100 mm) on either side of the connection plates. Further, they demonstrate that the stresses in gaps with drilled holes were higher than those in gaps without cracks, implying that the drilling hole technique is not sufficient to prevent crack extension. The behavior of the web gaps in X-type diaphragm bridges was greatly enhanced by the proposed method as the stress range and out-of-plane distortion were reduced by at least 42% at the exterior girders. For bridges with K-type diaphragms, a similar trend was obtained. However, the stress range increased in one of the web gaps after implementing the proposed method. Other design aspects (wind, stability of compression flange, and lateral distribution of loads) must be considered when deciding whether to adopt the proposed method. Considering the results of this investigation, the proposed method can be implemented for X-type diaphragm bridges. Further research is recommended for K-type diaphragm bridges
Book Synopsis Distortion-induced Fatigue Cracking in Steel Bridges by : John W. Fisher
Download or read book Distortion-induced Fatigue Cracking in Steel Bridges written by John W. Fisher and published by Transportation Research Board. This book was released on 1990 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Deformation Induced Cracking in Steel Girder Bridges and Retrofit Guidelines by :
Download or read book Deformation Induced Cracking in Steel Girder Bridges and Retrofit Guidelines written by and published by . This book was released on 1987 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Methods to Reduce Built-in Residual Stresses in Steel Bridge Diaphragms (Phase I) by : Jeffrey M. South
Download or read book Methods to Reduce Built-in Residual Stresses in Steel Bridge Diaphragms (Phase I) written by Jeffrey M. South and published by . This book was released on 2000 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamic Impact Factors for Bridges by : David I. McLean
Download or read book Dynamic Impact Factors for Bridges written by David I. McLean and published by Transportation Research Board. This book was released on 1998 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to state department of transportation and consulting bridge, structural, and research engineers. The synthesis describes the current state of the practice for determining dynamic impact factors for bridges. Information for the synthesis was collected by surveying U.S. and Canadian transportation agencies and by conducting a literature search using domestic and foreign sources. This report of the Transportation Research Board documents relevant background and recent information with regard to vehicular dynamic load effects on bridges. It provides details on the basic concepts of bridge dynamics, including identification of the main variables affecting bridge dynamic response. In addition, current code provisions for accounting for vehicular dynamic load effects for new bridge design and load evaluation of existing bridges are reported, including a discussion on the background of the provisions. Finally, a discussion of observed field problems associated with vehicular dynamic load effects, as obtained from the survey, are included.
Author :Richard A. Miller (Professional engineer) Publisher :Transportation Research Board ISBN 13 :0309087937 Total Pages :202 pages Book Rating :4.3/5 (9 download)
Book Synopsis Connection of Simple-span Precast Concrete Girders for Continuity by : Richard A. Miller (Professional engineer)
Download or read book Connection of Simple-span Precast Concrete Girders for Continuity written by Richard A. Miller (Professional engineer) and published by Transportation Research Board. This book was released on 2004 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction and Research Approach -- Findings -- Interpretation, Appraisal, and Application -- Interpretation, Appraisal, and Application -- References -- Appendixes.
Book Synopsis Bridge Engineering Handbook, Five Volume Set by : Wai-Fah Chen
Download or read book Bridge Engineering Handbook, Five Volume Set written by Wai-Fah Chen and published by CRC Press. This book was released on 2014-01-24 with total page 3042 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over 140 experts, 14 countries, and 89 chapters are represented in the second edition of the Bridge Engineering Handbook. This extensive collection provides detailed information on bridge engineering, and thoroughly explains the concepts and practical applications surrounding the subject, and also highlights bridges from around the world. This second edition of the bestselling Bridge Engineering Handbook covers virtually all the information an engineer would need to know about any type of bridge-from planning to construction to maintenance. It contains more than 2,500 tables, charts, and illustrations in a practical, ready-to-use format. An abundance of worked-out examples gives readers numerous practical step-by-step design procedures. Special attention is given to rehabilitation, retrofit, and maintenance. Coverage also includes seismic design and building materials. Thoroughly revised and updated, this second edition contains 26 new chapters.
Book Synopsis Fracture Mechanics: Applications and Challenges by : M. Fuentes
Download or read book Fracture Mechanics: Applications and Challenges written by M. Fuentes and published by Elsevier. This book was released on 2000-09-13 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains 15 fully peer-reviewed Invited Papers which were presented at the 13th Biennial European Conference on Fracture and is a companion to the CD-ROM http://www.elsevier.com/locate/isbn/008043701xProceedings. The organisers of the ECF 13 opted from the very beginning for an application-orientated conference, and consequently, this book contributes to the understanding of fracture phenomena, and disseminates fracture concepts and their application to the solution of engineering problems to practitioners in a wide range of fields. The fields covered in this book can be broadly classified into: elastic-plastic fracture mechanics, fracture dynamics, fatigue and interactive processes, failure, structural integrity, coatings and materials, with applications to the following industrial sectors: transport, aerospace engineering, civil engineering, pipelines and automotive engineering.
Book Synopsis Theory and Design of Bridges by : Petros P. Xanthakos
Download or read book Theory and Design of Bridges written by Petros P. Xanthakos and published by John Wiley & Sons. This book was released on 1994 with total page 1466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indeed, this essential working reference for practicing civil engineers uniquely reflects today's gradual transition from allowable stress design to Load and Resistance Factor Design by presenting LRFD specifications - developed from research requested by AASH-TO and initiated by the NCHRP - which spell out new provisions in areas ranging from load models and load factors to bridge substructure elements and foundations.
Book Synopsis Fatigue and Fracture by : F. C. Campbell
Download or read book Fatigue and Fracture written by F. C. Campbell and published by ASM International. This book was released on 2012-01-01 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book emphasizes the physical and practical aspects of fatigue and fracture. It covers mechanical properties of materials, differences between ductile and brittle fractures, fracture mechanics, the basics of fatigue, structural joints, high temperature failures, wear, environmentally-induced failures, and steps in the failure analysis process."--publishers website.
Book Synopsis Crossroads 2000 Proceedings, August 19-20, 1998, Iowa State University, Ames, Iowa by : Marcia Brink
Download or read book Crossroads 2000 Proceedings, August 19-20, 1998, Iowa State University, Ames, Iowa written by Marcia Brink and published by Institut Fur Geographie Der Universitat Munchen. This book was released on 1998 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bridge Engineering Handbook by : Wai-Fah Chen
Download or read book Bridge Engineering Handbook written by Wai-Fah Chen and published by CRC Press. This book was released on 2014-01-24 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this bestselling handbook covers virtually all the information an engineer would need to know about any type of bridge-from planning to construction to maintenance. It contains more than 2,500 tables, charts, and illustrations in a practical, ready-to-use format and an abundance of worked-out examples give readers numerous step-by-step design procedures. Extensively updated and featuring several new chapters, this volume, Construction and Maintenance, covers construction, inspection, bridge management systems, health monitoring, ratings, strengthening and rehabilitation, life cycle analysis and much more.
Book Synopsis Field Instrumentation and Analysis of the Tuttle Creek Bridge by : Nathan Marshall
Download or read book Field Instrumentation and Analysis of the Tuttle Creek Bridge written by Nathan Marshall and published by . This book was released on 2006 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report includes information about the Tuttle Creek Bridge and a summary of its structural deficiencies. Details of the gage installation and load testing are provided. Stresses induced by the truck loadings are presented in addition to the inferences from the measurements taken.
Book Synopsis Fatigue Cracking of Steel Bridge Structures by :
Download or read book Fatigue Cracking of Steel Bridge Structures written by and published by . This book was released on 1990 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue and Fracture in Steel Bridges by : John W. Fisher
Download or read book Fatigue and Fracture in Steel Bridges written by John W. Fisher and published by Wiley-Interscience. This book was released on 1984 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a detailed review and summary of twenty-two case studies of fracture and fatigue in bridge structures. Its two parts cover cracks formed as a result of low fatigue resistant details, and cracks resulting from unanticipated secondary or displacement induced stresses.
Book Synopsis Influence of Secondary Components on the Serviceability of Steel Girder Highway Bridges by : Mohamed Abdel-Azim Elewa
Download or read book Influence of Secondary Components on the Serviceability of Steel Girder Highway Bridges written by Mohamed Abdel-Azim Elewa and published by . This book was released on 2004 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transportation Research Record written by and published by . This book was released on 1997 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt:
