Diagonally Reinforced Concrete Coupling Beams with Grade 120 (830) High-Strength Steel Bars
Issue Date
2020Author
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.
Metadata
Show full item recordAbstract
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.
Collections
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
Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.