Simplified Live Load Distribution Factor Equations
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Simplified Live Load Distribution Factor Equations
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Author : BridgeTech, Inc
language : en
Publisher: Transportation Research Board
Release Date : 2007
Simplified Live Load Distribution Factor Equations written by BridgeTech, Inc and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Technology & Engineering categories.
This report contains the findings of research performed to develop recommended Load and Resistance Factor Design (LRFD) live load distribution factor design equations for shear and moment. The report details the development of equations that are simpler to apply and have a wider range of applicability than current methods. The appendices are not published in this report, but are available online at http://www.trb.org/news/blurb_detail.asp?id=7938.
Live Load Distribution On Glued Laminated Timber Girder Bridges
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Author :
language : en
Publisher:
Release Date : 2011
Live Load Distribution On Glued Laminated Timber Girder Bridges written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Forest products categories.
Increased use of timber bridges in the U.S. transportation system has required additional research to improve the current design methodology of these bridges. For this reason, the U.S. Forest Service, Forest Products Laboratory (FPL), and the Federal Highway Administration have supported several research programs to attain the objective listed above. This report is a result of a study sponsored by the FPL, with the objective of determining how highway truckloads are distributed to girders of a glued-laminated timber bridge. The American Association of State Highway and Transportation Official (AASHTO) load and resistance factor design (LRFD) Bridge Design Specification provides live-load distribution provisions for glued-laminated girder timber bridges that were used in previous AASHTO Specifications. The AASHTO live-load distribution provisions were reviewed in this report. Field-test results were used to review the current AASHTO LRFD glued-laminated timber girder bridge-design specifications and to validate analytical results obtained by finite-element analyses. With the validated analytical models, parametric studies were performed to determine the worst-case live-load distribution factors that can be used to calculate the design moment and shear for glued-laminated timber girders. Simplified live-load distribution equations that can be used to determine these distribution factors were developed and are provided in this report. These equations take into account how load is distributed to the bridge girders, considering the effects of span length, girder spacing, and clear width of the bridge.
Single Lane Live Load Distribution Factor For Decked Precast Prestressed Concrete Girder Bridges
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Author : John Zhongguo
language : en
Publisher:
Release Date : 2005
Single Lane Live Load Distribution Factor For Decked Precast Prestressed Concrete Girder Bridges written by John Zhongguo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Concrete bridges categories.
The live load distribution factor (DF) equations provided by AASHTO-LRFD for the decked precast/prestressed concrete (DPPC) girder bridge system do not differentiate between a single or multilane loaded condition. This practice results in a single lane load rating penalty for DPPC girder bridges. The objective of this project is to determine DF equations which accurately predict the distribution factor of the DPPC girder bridge system when it is only subjected to single lane loading. Eight DPPC girder bridges were instrumented. Each bridge was loaded with a single load vehicle to simulate the single lane loaded condition. The experimental data was used to calibrate 3D FE models and 2D grillage models of the DPPC girder bridge system. The calibrated models were used to conduct a parametric study of the DPPC girder bridge system subjected to a single lane loaded condition. Two sets of new equations that describe the single lane loaded distribution factor for both shear and moment forces of these bridges are proposed and compared with AASHTOLRFD DF equations.
Simplified Lrfd Bridge Design
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Author : Jai B. Kim
language : en
Publisher: CRC Press
Release Date : 2013-04-08
Simplified Lrfd Bridge Design written by Jai B. Kim and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-08 with Technology & Engineering categories.
Helping readers prepare for the civil and structural PE exam, this book presents numerous design examples that serve as a comprehensive, step-by-step guide to basic bridge design using the AASHTO LRFD Bridge Design Specifications, Fifth Edition. It offers a simplified explanation of load resistance factor design (LRFD) method-based bridge design principles and lists the AASHTO reference section numbers alongside formulas and where topics are introduced, to refer the reader to the primary source material. This is a valuable reference for civil engineering students as well as for practicing engineers.
Recommended Design Specifications For Live Load Distribution To Buried Structures
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Author : D. Lee Petersen
language : en
Publisher: Transportation Research Board
Release Date : 2010
Recommended Design Specifications For Live Load Distribution To Buried Structures written by D. Lee Petersen and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Technology & Engineering categories.
This report provides recommendations to revise the AASHTO LRFD Bridge Design Specifications relating to the distribution of live load to buried structures. The report details the development of simplified design equations (SDEs) for structural response based on three-dimensional (3D) analysis of 830 buried culverts. In addition, the report provides guidelines for conducting 2D and 3D modeling for design situations with conditions not covered by the SDEs. The material in this report will be of immediate interest to roadway and bridge designers.
Development Of Simplified Live Load Distribution Factor Equations
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Author : Michael D. Patrick
language : en
Publisher:
Release Date : 2004
Development Of Simplified Live Load Distribution Factor Equations written by Michael D. Patrick and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Bridges categories.
Monitoring And Load Distribution Study For The Land Bridge
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Author : Alireza Ghorbanpoor
language : en
Publisher:
Release Date : 2010
Monitoring And Load Distribution Study For The Land Bridge written by Alireza Ghorbanpoor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Box girder bridges categories.
Summary Of Progress National Cooperative Highway Research Program
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Author : National Cooperative Highway Research Program
language : en
Publisher:
Release Date : 2009
Summary Of Progress National Cooperative Highway Research Program written by National Cooperative Highway Research Program and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Highway research categories.
Recommended Specifications For Large Span Culverts
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Author : Timothy J. McGrath
language : en
Publisher: Transportation Research Board
Release Date : 2002
Recommended Specifications For Large Span Culverts written by Timothy J. McGrath and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Technology & Engineering categories.
The Manual For Bridge Evaluation
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Author : American Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures
language : en
Publisher: AASHTO
Release Date : 2011
The Manual For Bridge Evaluation written by American Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures and has been published by AASHTO this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Bridges categories.