Bridge diagnosis at 55 mph

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Description

The Federal Highway Administration (FHWA) has helped sponsor a research project at Lawrence Livermore that produced a beneficial new tool as well as an R&D 100 Award. The HERMES Bridge Inspector will provide an invaluable capability to diagnose the problems of deteriorating bridge decks and do it accurately, efficiently, nondestructively, and, perhaps most important to motorists, without closing bridges. Almost 30% of 600,000 large highway bridges in the U.S. are classified "deficient" by the FHWA, and HERMES can make a significant contribution toward solving the problem of infrastructure assessment and repair. With further development, HERMES holds promise for other concrete ... continued below

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329 Kilobytes

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Azevedo, S October 1, 1998.

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Description

The Federal Highway Administration (FHWA) has helped sponsor a research project at Lawrence Livermore that produced a beneficial new tool as well as an R&D 100 Award. The HERMES Bridge Inspector will provide an invaluable capability to diagnose the problems of deteriorating bridge decks and do it accurately, efficiently, nondestructively, and, perhaps most important to motorists, without closing bridges. Almost 30% of 600,000 large highway bridges in the U.S. are classified "deficient" by the FHWA, and HERMES can make a significant contribution toward solving the problem of infrastructure assessment and repair. With further development, HERMES holds promise for other concrete inspection problems, such as railroads, tunnels, and runways. HERMES, or High-performance Electromagnetic Roadway Mapping and Evaluation System, is a radar-based sensing system mounted in a trailer. It can be pulled by a vehicle at traffic speeds over a bridge deck to collect information about the roadway subsurface -- its sensors gathering data 30 centimeters or more into concrete. An onboard computer system processes the data into three-dimensional images that pinpoint problems in the roadway concrete and give engineers quantitative information about deterioration in the bridge deck. Engineers can then better assess what repairs or reconstruction is necessary and avoid the cost overruns and delays that result from inexact problem diagnoses.

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329 Kilobytes

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  • Other: DE00008173
  • Report No.: UCRL-ID-132495
  • Grant Number: W-7405-Eng-48
  • DOI: 10.2172/8173 | External Link
  • Office of Scientific & Technical Information Report Number: 8173
  • Archival Resource Key: ark:/67531/metadc740444

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Office of Scientific & Technical Information Technical Reports

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  • October 1, 1998

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • May 6, 2016, 9:37 p.m.

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Azevedo, S. Bridge diagnosis at 55 mph, report, October 1, 1998; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc740444/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.