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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 Performance of Two-Column Bents - Part I: Retrofit with Carbon Fiber-Reinforced Polymer Fabrics
Author(s): Claudia Pulido, M. Saiid Saiidi, David Sanders, Ahmad Itani, and Saad El-Azazy
Publication: Structural Journal
Appears on pages(s): 558-568
Keywords: bridge; column; fiber-reinforced concrete; seismic
Abstract:A study on the seismic behavior of two-column bents with drop cap beams built prior to the 1970s was conducted at the University of Nevada, Reno. Identical 1/4-scale models followed typical geometric and reinforcement properties of typical substandard bridges. One specimen tested in the as-built condition, while a second one was retrofitted using carbon fiber-reinforced polymer (CFRP) fibers before testing. The retrofit was designed using current design recommendations of the California Department of Transportation (Caltrans). The specimens were tested under identical conditions using shaketables. The as-built bent had severe shear damage and low displacement ductilities. The CFRP retrofit efficiently modified the failure mode and enhanced the overall performance, lateral load-carrying capacity, and displacement ductility. A simple model was developed for fiber-reinforced polymer (FRP)-confined concrete stress-strain curves and was implemented in the pushover analysis. A discussion on the experimental and analytical results and the effectiveness of the CFRP retrofit is presented.
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