Bridge management for the 21st century
01 Jan 2000-Transportation Research Record (Transportation Research Board of the National Academies)-Vol. 1696, Iss: 1696, pp 197-203
TL;DR: The bridge health index (HI) as discussed by the authors is an improved and more comprehensive numerical rating system that uses the element inspection data to determine the remaining asset value of a bridge or network of bridges.
Abstract: Bridge management has been a subject of intense interest and development for the past 10 years. In support of improved bridge management, FHWA funded the development of the Pontis bridge computer program, which is now in use by approximately 40 of the 50 states. In addition, many new guide specifications have been produced to assist bridge managers in their efforts to better manage the nation's aging bridge inventory. The AASHTO Subcommittee on Bridges and Structures has taken the lead along with FHWA in implementing the improved bridge management systems. California and a few other states have been critical of the current ranking system for bridge maintenance and have been working to develop an improved performance measure. The bridge health index (HI), an improved and more comprehensive numerical rating system that uses the element inspection data to determine the remaining asset value of a bridge or network of bridges, is discussed. The HI is more consistent with the element-level evaluation data colle...
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TL;DR: The quantification scores developed in this study could help transportation agencies and bridge engineers to identify more easily the key element or combination of elements associated with poor or severe condition, so that they can make data-driven decisions in maintaining and repairing the most needed bridge elements.
Abstract: The bridge has been a crucial element of the transportation system of the U.S.A. for many years. The National Bridge Inventory (NBI) reported more than 615,000 national bridges in 2018. Maintaining...
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TL;DR: In this paper, a literature survey on active bridge maintenance with focus on impregnation is presented, which summarizes the most suitable methods of active bridge repair and maintenance, including passive maintenance and active preventive maintenance.
Abstract: In Sweden, there are in all 27 000 bridges. The Swedish Road Administration is responsible for 12 000 of these bridges. 50 percent of them are built between 1950 and 1980 and have, thus, obtained an age at which the need of maintenance and repair usually increases. A hypothesis is that the preventive bridge maintenance could be optimised through thorough analyses of properties of the bridge element, actual mechanical stresses, and ambient microclimate. An active maintenance is defined as the optimised preventive maintenance allowing different measures to be selected for different bridge elements. The opposite is passive maintenance, a form of maintenance that is equal to all bridge elements independent of element properties, actual stresses, and ambient microclimate. Impregnation has been regarded as one of the most suitable methods of active bridge maintenance. This paper summarizes a literature survey on active bridge maintenance with focus on impregnation.
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Cites background from "Bridge management for the 21st cent..."
...The total repair cost has been estimated to somewhat between 51 [3] and 100 [4] billion USD....
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Dissertation•
01 Jan 2012
1 citations
01 Dec 2013
TL;DR: In this paper, the influence of deicing agents on the ability of reinforced-concrete bridge decks to serve as a transverse load distribution and redistribution mechanism in steel girder bridges is assessed and quantified.
Abstract: The key objectives of this work were: (1) to assess and quantify the influence of corrosion caused by deicing-agents on the ability of reinforced-concrete bridge decks to serve as a transverse load distribution and redistribution mechanism in steel girder bridges; (2) to formulate a rating procedure to quantify the system capacity of bridges that includes the effects of reinforced-concrete deck deterioration; and (3) to explore the correlations deck condition ratings and level of deterioration and how this may affect predicted system capacities. The primary components of the scope of work began with reviewing the literature to quantify the effect of deicing agents on the structural performance of reinforced concrete members. A finite element methodology was then formulated and calibrated to simulate this effect, first in analytical reproductions of the experimental specimens in the literature and then through FEA models of three existing steel I-girder bridges that had been calibrated to field data in prior work. Theoretical calculations supported by the data generated from these models and data from bridge inspection reports was used to accomplish the second and third objectives.
1 citations
01 Jan 2019