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Title: RESEARCH PAYS OFF--NCHRP STUDY--METHODS FOR IN-PLACE REPAIR OF DAMAGED PRESTRESSED CONCRETE BRIDGES
Accession Number: 00457510
Record Type: Component
Availability: Find a library where document is available Abstract: In a study recently completed under the AASHTO-sponsored National Cooperative Highway Research Program (NCHRP), consulting engineers George Shanafelt and Willis Horn of Olympia, Washington, evaluated several repair-in-place methods that have been used by individual highway agencies with varying degrees of success. They developed modifications of these procedures, and recommended several methods appropriate for immediate use, which were published in NCHRP Report 226: Damage Evaluation and Repair Methods for Prestressed Concrete Bridge Members. In this report, guidance is given on the use of various techniques such as splicing severed cables, internal prestressing, steel-sleeve splicing, patching under preload, and external post-tensioning. In a recently completed second phase of research, the efficacy of the recommended techniques was demonstrated in full-scale laboratory tests. A manual of recommended practice will be published at the end of 1985 as NCHRP Report 280: Guidelines for Evaluation and Repair of Damaged Prestressed Concrete Bridge Members. This report will include guidelines for (a) inspection of damage, (b) assessment of damage, (c) selection of repair method, and (d) application of techniques for in-place repair. Repair methods recommended by the researchers have been used by the Washington, Iowa, and North Carolina departments of transportation, as well as by several other highway agencies, with satisfactory results and substantial cost savings. Moreover, since the publication of NCHRP Report 226, interest in repair-in-place has spread to other states. The cost of complete replacement of a damaged girder averages about $50,000, and the cost of repair-in-place is estimated to be about $15,000; thus, the savings realized by applying the results of this research to only 20 percent of the approximately 150 girders damaged each year will amount to more than $1 million. (Author)
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Pagination: p. 22-23
Publication Date: 1985-11
Serial: Features: Figures
(1)
; Photos
(2)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Bridges and other structures; Data and Information Technology; Highways; Maintenance and Preservation; Materials; I61: Equipment and Maintenance Methods
Files: TRIS, TRB
Created Date: Aug 31 1986 12:00AM
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