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dc.contributor.authorPoudel, Ashwin
dc.contributor.authorAmeen, Shahedreen
dc.contributor.authorLequesne, Rémy D.
dc.contributor.authorLepage, Andrés
dc.identifier.citationPoudel, A., Ameen, S., Lequesne, R.D., Lepage, A., (2021). "Diagonally Reinforced Concrete Coupling Beams: Effects of Axial Restraint". ACI Structural Journal, vol. 118, no. 6. pp. 293-303. DOI: 10.14359/51732991en_US
dc.description.abstractTwo pairs of nominally identical large-scale coupling beam specimens were tested under reversed cyclic displacements. Within each pair, one specimen was free to elongate and the other had resistance to elongation during testing. The specimens had clear span-to-overall-depth ratios of 1.9, a nominal concrete compressive strength of 6000 psi (42 MPa), Grade 60 or 120 (420 or 830) diagonal bars, and nominal shear stresses near the ACI Building Code (ACI 318) limit of 10√fc′ psi (0.83√fc′ MPa). Passive axial restraint resulted in beam axial forces and was correlated with higher coupling beam strength, lower chord rotation capacity, earlier diagonal bar buckling, and greater damage. The importance of these effects increased with the magnitude of the induced axial force. The ACI equation for coupling beam nominal strength (based on the area, yield stress, and inclination of diagonal bars) underestimated beam strength by up to 80%, whereas estimates based on flexural strength were substantially more accurate and allowed consideration of axial force effects.en_US
dc.publisherAmerican Concrete Instituteen_US
dc.rightsCopyright © 2021, 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.en_US
dc.subjectAxial forceen_US
dc.subjectAxial restrainten_US
dc.subjectChord rotation capacityen_US
dc.subjectCoupling beam strengthen_US
dc.subjectDamage progressionen_US
dc.subjectHigh-strength reinforcementen_US
dc.subjectReversed cyclic displacementsen_US
dc.titleDiagonally Reinforced Concrete Coupling Beams: Effects of Axial Restrainten_US
dc.typeTechnical Reporten_US
kusw.kuauthorLequesne, Rémy D.
kusw.kuauthorLepage, Andrés
kusw.kudepartmentCivil, Environmental and Architectural Engineeringen_US
dc.identifier.orcid 0000-0003-2146-7243en_US

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