Redevelopment of Prestressing Force in Severed Prestressed Strands
The flexural capacity rating of prestressed girders having severed or corroded strands often progresses by simply neglecting the contribution of the affected strands from the girder section and assessing the capacity. While this is an adequate approach at the affected section, it is conservative elsewhere along the span, assuming that fully bonded strands are used. Once it reenters sound concrete, the severed or corroded strand continues to be bonded to the concrete; thus stress transfer between the concrete and strand is possible and the strand prestress force may be “redeveloped” (in the sense of transfer length) by bond transfer at a distance from the damage location. This paper reports an experimental study that clearly shows that prestress force is redeveloped at a distance from the location at which a strand is severed. Furthermore, American Association of State Highway and Transportation Officials (AASHTO) and American Concrete Institute (ACI) code-prescribed transfer-length calculations appear to remain valid for this redevelopment behavior.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/32947845
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Authors:
- Kasan, Jarret
- Harries, Kent A
- Publication Date: 2011
Language
- English
Media Info
- Media Type: Print
- Features: Photos; Tables;
- Pagination: pp 431-437
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Serial:
- Journal of Bridge Engineering
- Volume: 16
- Issue Number: 3
- Publisher: American Society of Civil Engineers
- ISSN: 1084-0702
- Serial URL: http://ojps.aip.org/beo
Subject/Index Terms
- TRT Terms: Bonding; Concrete bridges; Corrosion; Flexural strength; Force; Girders; Prestressed concrete
- Uncontrolled Terms: Prestressed strands; Transfer length
- Subject Areas: Bridges and other structures; Highways; I24: Design of Bridges and Retaining Walls;
Filing Info
- Accession Number: 01342432
- Record Type: Publication
- Files: TRIS, ASCE
- Created Date: Jun 23 2011 9:06AM