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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Anchorage Zone Cracking of Post-Tensioned Bridge Decks with Closely Spaced Anchors
Author(s): J. A. Burgess, J. E. Breen and R. W. Poston
Publication: Special Publication
Appears on pages(s): 79-108
Keywords: anchorage (structural); bridge decks; cracking (fracturing); post-tensioning; prestressed concrete; spiral reinforcement; stresses; tests; Structural Research
Abstract:An experimental investigation was conducted to examine cracking of post-tensioned bridge deck anchorage zones with closely spaced anchors. The test program included full-scale tests of bridge deck anchorage zones with single and closely spaced anchorages. Half of the test specimens contained additional spiral anchorage zone reinforcement. The test results indicate that when the anchorages are closely spaced, a previously stressed anchor tends to precompress the anchorage zone of an adjacent anchor and slightly increases its cracking load. In heavily reinforced bridge decks, additional spiral anchorage zone reinforcement provides only a slight to moderate increase in the anchorage zone cracking or ultimate load. Predicted cracking loads based on ACI-PTI's allowable stress provisions were generally conservative for single and closely spaced bridge deck anchorages.
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