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  • Effectiveness of different types of antiburst reinforcements for achorage zones of post-tensioned concrete slabs

    Author(s)
    Chowdhury, Sanaul
    Loo, Yew-Chaye
    Wallbank, Scott
    Griffith University Author(s)
    Loo, Yew-Chaye
    Chowdhury, Sanaul H.
    Wallbank, Scott
    Year published
    2006
    Metadata
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    Abstract
    A post-tensioned prestressed system basically consists of a high strength tendon or strand running through the length of the concrete structure. The strand is stressed using a hydraulic jack, the tensile stressing force of the strand is transferred into the concrete by the use of anchorages. One of the most critical aspects of post-tensioned construction, which is also necessary for the success of the system, is the "anchorage zone". The relatively large compressive forces generated from the strand are applied to the concrete over a small area. For this reason steel reinforcement known as anti-burst is used in the anchorage ...
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    A post-tensioned prestressed system basically consists of a high strength tendon or strand running through the length of the concrete structure. The strand is stressed using a hydraulic jack, the tensile stressing force of the strand is transferred into the concrete by the use of anchorages. One of the most critical aspects of post-tensioned construction, which is also necessary for the success of the system, is the "anchorage zone". The relatively large compressive forces generated from the strand are applied to the concrete over a small area. For this reason steel reinforcement known as anti-burst is used in the anchorage zone to control cracking caused by tensile forces as a result of the tensioning. Eight 150 mm thick 400mm x 1000mm post-tensioned concrete slabs with varying types of anti-burst reinforcements and two different concrete strengths were designed and tested to failure. Pull out tests were conducted at up to 95% of the tendon's tensile strength to find out the most effective type of anti-burst reinforcement and the effect of variation in concrete strengths. The rectangular helices type was found to be the best performer while the higher concrete strength was the better.
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    Journal Title
    Revista Ciências Exatas
    Volume
    12
    Issue
    2
    Publisher URI
    http://periodicos.unitau.br/ojs-2.2/index.php/exatas/index
    http://periodicos.unitau.br/ojs-2.2/index.php/exatas/article/view/394
    Publication URI
    http://hdl.handle.net/10072/27621
    Collection
    • Journal articles

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