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    Shear Capacity of Monolithic Concrete Joints without Transverse Reinforcement.

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    Publication date
    2012-09
    Author
    Yang, Keun-Hyeok
    Sim, J-I.
    Kang, J-H.
    Ashour, Ashraf F.
    Keyword
    Concrete; Monolithic Concrete Joints; Shear Capacity; Mechanism analysis
    Rights
    Copyright statement: © 2012 ICE. Reproduced in accordance with the publisher's self-archiving policy.
    Peer-Reviewed
    yes
    
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    Abstract
    A mechanism analysis based on the upper-bound theorem of concrete plasticity for monolithic concrete joints without transverse reinforcement is presented. Concrete is modelled as a rigid–perfectly plastic material obeying modified Coulomb failure criteria. Existing stress–strain relationships of concrete in compression and tension are comprehensively modified using the crack band theory to allow for concrete type and maximum aggregate size. Simple equations for the effectiveness factor for compression, ratio of effective tensile strength to compressive strength and angle of concrete friction are then mathematically developed using the modified stress–strain relationships of concrete. In addition, 12 push-off specimens made of all-lightweight, sand–lightweight and normal-weight concrete having maximum aggregate size between 4 and 19 mm were physically tested. Test results and mechanism analysis clearly showed that the shear capacity of monolithic concrete joints increased with the increase of the maximum aggregate size and dry density of concrete. The mean and standard deviation of the ratio between experimentally measured and predicted (by the mechanism analysis shear capacities) are 1·01 and 0·16 respectively, showing a closer prediction and less variation than Vecchio and Collins' equation, regardless of concrete type and maximum aggregate size.
    URI
    http://hdl.handle.net/10454/7605
    Version
    Accepted Manuscript
    Citation
    Yang KH, Sim JI, Kang JH and Ashour AF (2012) Shear Capacity of Monolithic Concrete Joints without Transverse Reinforcement. Magazine of Concrete Research 64 (9):767-779.
    Link to publisher’s version
    http://dx.doi.org/10.1680/macr.11.00107
    Type
    Article
    Collections
    Engineering and Informatics Publications

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