Elimination of Diagonal Reinforcement in Earthquake-Resistant Coupling Beams through Use of Fiber-Reinforced Concrete

View/ Open
Issue Date
2017Author
Parra-Montesinos, Gustavo
Wight, James K.
Kopczynski, C.
Lequesne, Rémy D.
Setkit, M.
Conforti, A.
Ferzli, J.
Publisher
American Concrete Institute
Type
Article
Article Version
Scholarly/refereed, publisher version
Is part of series
ACI Special Publication;313
Published Version
https://www.concrete.org/publications/internationalconcreteabstractsportal.aspx?m=details&ID=51689686Metadata
Show full item recordAbstract
The design of reinforced concrete coupling beams in regions of high seismicity typically includes the use of diagonal bars designed to resist the entire shear demand, along with closely spaced transverse reinforcement to provide concrete confinement and diagonal bar support. While results from experimental investigations indicate that this design leads to stable behavior under large displacement reversals, the required reinforcement detailing is labor intensive and time consuming. One alternative that has been proven successful to simplify reinforcement detailing in coupling beams is the addition of discontinuous, deformed steel fibers to the concrete. Test results indicate that elimination of diagonal reinforcement, along with substantial reductions in confinement reinforcement over most of the beam span, are possible in coupling beams with span-to-depth ratios greater than or equal to approximately 2.2 when a tensile strain-hardening fiber reinforced concrete is used. Given the advantages of eliminating diagonal reinforcement in coupling beams, this new design was incorporated in high-rise structures in the State of Washington, USA, starting in the early 2010s. In this paper, a brief summary of relevant experimental results and the implementation of fiber reinforced concrete coupling beams in high-rise earthquake-resistant construction is provided.
Collections
Citation
Parra-Montesinos, G. J., Wight, J. K., Kopczynski, C., Lequesne, R. D., Setkit, M., Conforti, A., and Ferzli, J. (2017). "Elimination of Diagonal Reinforcement in Earthquake-Resistant Coupling Beams through Use of Fiber-Reinforced Concrete.” SP-313: Proceedings of the First ACI and JCI Joint Seminar: Design of Concrete Structures Against Earthquake and Tsunami Disasters, Special Publication of the American Concrete Institute, Farmington Hills, MI.
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.