Methods For Increasing Live Load Capacity Of Existing Highway Bridges PDF Download
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Author | : Roger A. Dorton |
Publisher | : Transportation Research Board |
Total Pages | : 76 |
Release | : 1997 |
Genre | : Technology & Engineering |
ISBN | : 9780309061056 |
Download Methods for Increasing Live Load Capacity of Existing Highway Bridges Book in PDF, ePub and Kindle
This synthesis will be of interest to state department of transportation bridge design and structural engineers, bridge consultants, and others involved in applied and research methods for increasing the live load capacity of existing highway bridges. The synthesis describes the current state of the practice for the various methods used to increase the live load capacity of existing highway bridges. This is done predominantly for bridges in the short- to medium-span range. Information on the more common bridge material types is presented. There is an emphasis on superstructure rather than substructure strengthening.
Author | : National Cooperative Highway Research Program |
Publisher | : |
Total Pages | : 66 |
Release | : 1997 |
Genre | : Bridges |
ISBN | : |
Download Methods for Increasing Live Load Capacity of Existing Highway Bridges Book in PDF, ePub and Kindle
Author | : Roland H. Berger |
Publisher | : |
Total Pages | : 158 |
Release | : 1978 |
Genre | : Bridges |
ISBN | : |
Download Extending the Service Life of Existing Bridges by Increasing Their Load Carrying Capacity Book in PDF, ePub and Kindle
A catalog of bridge deficiencies is developed based on the inspection of over 140 deficient bridges located in Illinois, Florida, Pennsylvania, California, and Tennessee. A classification of structure types is developed for concrete, steel and timber bridges. Deficiencies are related to the structure classification system and a hierarchy of the most common deficiencies established. Techniques presently utilized by state highway departments to correct deficiences are described and evaluated. Several innovative techniques for increasing the load carrying capacity are also described. Utilizing these techniques, increased capacity values are developed. Cost factors are also analyzed and graphic presentations which show the relative merit of each system are presented.
Author | : Devin K. Harris |
Publisher | : |
Total Pages | : 49 |
Release | : 2021 |
Genre | : Bridges |
ISBN | : |
Download Performance Characteristics of In-Service Bridges for Enhancing Load Ratings: Leveraging Refined Analysis Methods Book in PDF, ePub and Kindle
Bridge load rating assesses the safe live load carrying capacity of an existing or newly designed structure. In addition to load rating with previously defined standard load rating vehicles, the Federal Highway Administration issued additional guidance to states related to rating requirements for all the bridges with respect to specialized hauling vehicles and emergency vehicles that must be met by the end of 2022. It is recognized that the load effects (bending moment and shear) produced by these vehicle types on certain bridge types and spans might be greater than those caused by the previous rating vehicles. Therefore, a number of bridges within VDOT’s inventory may require posting when rated with these specialized vehicles. The goal of this study was to assess the likelihood of an increase in load rating factors through refined analysis methods for the bridge classes potentially vulnerable to load ratings under consideration of the new federal regulations and when using conventional, simplified equations for load distribution factors. In particular, the study focused on the evaluation of live load distribution factors for girder bridges and effective widths for distributing live loads in slab bridges through refined analysis. Three bridge classes (simple span steel girder bridges, reinforced concrete T-beam bridges, and concrete slab bridges) were selected for this refined analysis. Girder bridges were modeled using the plate-with-an-eccentric-beam analysis approach, while plate elements were used to model slab bridges within the LARSA 4D software package. The selected modeling approaches were validated through the simulation of the bridge structures with available field-testing results from the literature. A total of 71 in-service bridges belonging to the three selected bridge classes were then modeled and analyzed to compute the load distribution factors for girder bridges or effective widths for slab bridges, and the results were compared with those obtained from the code-specified equations. Using the data obtained from these numerical simulations, a series of multi-parameter linear regression models were developed to predict the percent change in distribution factor and effective width, respectively, for girder and slab bridges with different geometrical characteristics if a refined method analysis is implemented. The regression models were limited to four parameters such that the results from regression models could be presented in table format. The developed tables should be used as screening tools to provide guidance on the use of refined methods of analysis to improve the load ratings of bridges vulnerable to posting from previously existing load rating classifications as well as the recently introduced vehicles. Should VDOT use refined methods of analysis, there is good potential that the agency can avoid posting a substantial portion of its inventory, saving resources for more critical needs while safely keeping Virginia’s bridges open for commerce and the traveling public
Author | : |
Publisher | : World Scientific |
Total Pages | : 771 |
Release | : |
Genre | : |
ISBN | : |
Download Book in PDF, ePub and Kindle
Author | : Kiang Hwee Tan |
Publisher | : World Scientific |
Total Pages | : 1526 |
Release | : 2003-06-20 |
Genre | : Technology & Engineering |
ISBN | : 9814485748 |
Download Fibre-reinforced Polymer Reinforcement For Concrete Structures (In 2 Volumes) - Proceedings Of The Sixth International Symposium On Frp Reinforcement For Concrete Structures (Frprcs-6) Book in PDF, ePub and Kindle
Fibre-reinforced polymer (FRP) reinforcement has been used in construction as either internal or external reinforcement for concrete structures in the past decade. This book provides the latest research findings related to the development, design and application of FRP reinforcement in new construction and rehabilitation works. The topics include FRP properties and bond behaviour, externally bonded reinforcement for flexure, shear and confinement, FRP structural shapes, durability, member behaviour under sustained loads, fatigue loads and blast loads, prestressed FRP tendons, structural strengthening applications, case studies, and codes and standards.
Author | : National Cooperative Highway Research Program |
Publisher | : |
Total Pages | : 156 |
Release | : 2009 |
Genre | : Highway research |
ISBN | : |
Download Summary of Progress - National Cooperative Highway Research Program Book in PDF, ePub and Kindle
Author | : Wai-Fah Chen |
Publisher | : CRC Press |
Total Pages | : 758 |
Release | : 2023-01-06 |
Genre | : Technology & Engineering |
ISBN | : 1000887847 |
Download Bridge Engineering Handbook Book in PDF, ePub and Kindle
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." This third volume includes sections covering construction and maintenance, special topics, and worldwide practice.
Author | : |
Publisher | : |
Total Pages | : 322 |
Release | : 2003 |
Genre | : Highway research |
ISBN | : |
Download Research Results Digest Book in PDF, ePub and Kindle
Author | : David I. McLean |
Publisher | : Transportation Research Board |
Total Pages | : 72 |
Release | : 1998 |
Genre | : Technology & Engineering |
ISBN | : 9780309068192 |
Download Dynamic Impact Factors for Bridges Book in PDF, ePub and Kindle
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.