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    Shear Strength of Lightly Reinforced T-Beams in Negative Bending

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    Rodrigues and Darwin 84-s09.pdf (844.0Kb)
    Issue Date
    1987
    Author
    Rodrigues, Carlos Pinto
    Darwin, David
    Publisher
    American Concrete Institute
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Published Version
    https://iri.ku.edu/reports
    Rights
    Copyright © 1987, American Concrete Institute. All rights reserved, including the making of copies unless permission is obtained from the copyright proprietors. Pertinent discussion will be published in the Nov.-Dec. 1987 ACI Structural Journal if received by July I, 1987.
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    Abstract
    Nine restrained T-beams were tested in a study of negative moment region shear strength of lightly reinforced concrete T-beams. Variables included the longitudinal reinforcement ratio {rho} w (0.47 and 0.70 percent) and the nominal stirrup strength (0 to 84 psi [0 to 0.60 MPa]). The test results are compared with the shear provisions of "Building Code Requirements for Reinforced Concrete (ACI 318-830.) Both the concrete and stirrup contributions to shear strength are lower in negative than in positive moment regions. In both moment regions, the cracking shear is lower and the stirrup contribution is higher than predicted by ACI 318. Current provisions are conservative for positive moment regions of beams with {rho} w to ò 0.5 percent. The provisions are also conservative for negative moment regions in which the factored shear V u is less than or equal to the design shear strength of the concrete íV c. However, ACI 318 appears to be unconservative for negative moment regions of beams with {rho} w ó 7 percent and V u > l percent and íV c/2 ó V u ó íV c.
    Description
    Pertinent discussion was published in the Nov.-Dec. 1987 ACI Structural Journal.
    URI
    http://hdl.handle.net/1808/25095
    Collections
    • Infrastructure Research Institute Scholarly Works [324]
    Citation
    Rodrigues, C. P. and Darwin, D., “Shear Strength of Lightly Reinforced T-Beams in Negative Bending,” ACI Structural Journal, Vol. 84, No. 1, January-February 1987, pp. 77-85.

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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