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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Seismic Upgrade of Reinforced Concrete Slab-Column Connections Using Carbon Fiber-Reinforced Polymers
Author(s): Andrew Stark, Baris Binici, and Oguzhan Bayrak
Publication: Structural Journal
Appears on pages(s): 324-333
Keywords: fiber-reinforced polymer; seismic; slab
Abstract:The results of an experimental program on seismic upgrade of slab-column connections are presented in this paper. Two of the four slab-column specimens designed according to ACI 318-63 code provisions were upgraded by externally installed carbon fiber-reinforced polymer (CFRP) stirrups and the other two, designed and detailed according to the ACI 318-63 and ACI 318-02 codes, respectively, served as control specimens. Specimens were tested under constant gravity shear and lateral displacements were applied in a reversed cyclic manner. Punching shear failure occurred for the control specimens at a lateral drift-ratio of approximately 2%. Upgraded specimens had significant flexural yielding and sustained deformations up to a drift ratio of approximately 8% without significant losses of strength. Punching failure was not observed in the upgraded specimens. In the upgraded specimens, displacement ductility increased by a factor of at least 2 and the joint rotation ductility factor increased up to 3.5 times that of the control specimen. The results of the experimental program showed that the proposed upgrade method is successful in increasing deformation capacity and avoiding brittle failures that can occur under high gravity loadings.
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