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    Diagonally Reinforced Concrete Coupling Beams with Grade 120 (830) High-Strength Steel Bars

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    2020 Ameen, Lequesne, Lepage; Diagonally reinforced concrete coupling beams with Grade 120 (830) high-strength steel bars.pdf (3.111Mb)
    Issue Date
    2020
    Author
    Ameen, Shahedreen
    Lequesne, Rémy D.
    Lepage, Andrés
    Publisher
    American Concrete Institute
    Type
    Technical Report
    Rights
    Copyright © 2020, American Concrete Institute. All rights reserved, including the making of copies unless permission is obtained from the copyright proprietors. Pertinent discussion including author’s closure, if any, will be published ten months from this journal’s date if the discussion is received within four months of the paper’s print publication.
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    Abstract
    Four large-scale coupling beams were tested under fully reversed cyclic loads to investigate the effects on behavior of diagonal bar grade (60 or 120 [420 or 830]), beam shear stress (9.5 or 14√fc′, psi [0.79 or 1.17√fc′, MPa]), and longitudinal bar detailing (either terminated near the beam-wall interface or developed into the walls). Coupling beam chord rotation capacity was 7.1% for the beam with Grade 60 (420) bars and between 5.1 and 5.6% for the beams with Grade 120 (830) bars, a difference likely due to having hoops spaced at 3.4db and 4db for Grade 60 and 120 (420 and 830) bars, where db is the diagonal bar diameter. Effective stiffness, energy dissipation, and residual chord rotations were approximately inversely proportional to bar grade. Developing the secondary longitudinal reinforcement reduced rotation demands at beam ends but did not improve deformation capacity. Beam shear stress did not affect beam chord rotation capacity.
    URI
    http://hdl.handle.net/1808/32691
    DOI
    https://doi.org/10.14359/51728067
    Collections
    • Civil, Environmental & Architectural Engineering Scholarly Works [120]
    Citation
    Ameen, S., Lequesne, R.D., Lepage, A., (2020). "Diagonally Reinforced Concrete Coupling Beams with Grade 120 (830) High-Strength Steel Bars". ACI Structural Journal. Vol. 117, No. 6. DOI: 10.14359/51728067

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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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