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    Axial behavior of reinforced concrete short columns strengthened with wire rope and T-shaped steel plate units.

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    Publication date
    2009-03
    Author
    Yang, Keun-Hyeok
    Ashour, Ashraf F.
    Lee, E-T.
    Keyword
    Columns; Rehabilitation; Concrete structures; Reinforced concrete
    Rights
    © 2009 ICE. Reproduced in accordance with the publisher's self-archiving policy.
    Peer-Reviewed
    yes
    
    Metadata
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    Abstract
    This paper presents a relatively simple column strengthening procedure using unbonded wire rope and T-shaped steel plate units. Twelve strengthened columns and an unstrengthened control column were tested to failure under concentric axial load to explore the significance and shortcomings of the proposed strengthening technique. The main variables investigated were the volume ratio of wire ropes as well as geometrical size and configuration of T-shaped steel plates. Axial load capacity and ductility ratio of columns tested were compared with predictions obtained from the equation specified in ACI 318-05 and models developed for conventionally tied columns, respectively. The measured axial load capacities of all strengthened columns were higher than predictions obtained from ACI 318-05, indicating that the ratio of the measured and predicted values increased with the increase of volume ratio of wire ropes and flange width of T-shaped steel plates. In addition, at the same lateral reinforcement index, a much higher ductility ratio was exhibited by strengthened columns having a volume ratio of wire ropes above 0·0039 than tied columns. The ductility ratio of strengthened columns tested increased with the increase of flange width, thickness, and web height of T-shaped steel plates. A mathematical model for the prediction of stress–strain characteristics of confined concrete using the proposed strengthening technique is developed, that was in good agreement with test results.
    URI
    http://hdl.handle.net/10454/7541
    Version
    Accepted Manuscript
    Citation
    Yang KH, Ashour AF and Lee ET (2009) Axial behavior of reinforced concrete short columns strengthened with wire rope and T-shaped steel plate units. Magazine of Concrete Research, 61 (2): 43–154.
    Link to publisher’s version
    http://dx.doi.org/10.1680/macr.2008.00016
    Type
    Article
    Collections
    Engineering and Informatics Publications

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