Shear Strengthening of Reinforced Concrete Beams with Near-surface Mounted Fiber-reinforced Polymer Rods
Abstract
The use of near-surface mounted (NSM) fiber-reinforced polymer (FRP) rods is a promising technology for increasing flexural and shear strength of deficient reinforced concrete (RC) members. As this technology emerges, the structural behavior of RC elements strengthened with NSM FRP rods needs to be fully characterized. Eight full-size beams (two control beams and six strengthened beams) were tested. Carbon FRP deformed rods were used for shear strengthening. The variables examined in the shear tests were spacing of the rods, strengthening pattern, end anchorage of the rods, and presence of internal steel shear reinforcement. Performance of the tested beams and modes of failure are presented and discussed in this paper. The test results confirm that NSM FRP rods can be used to significantly increase the shear capacity of RC elements, with efficiency that varies depending on the tested variables. Results of the experimental tests are compared with the predictions of a simple model, showing reasonable agreement.
Recommended Citation
L. De Lorenzis and A. Nanni, "Shear Strengthening of Reinforced Concrete Beams with Near-surface Mounted Fiber-reinforced Polymer Rods," ACI Structural Journal, vol. 98, no. 1, pp. 60 - 68, American Concrete Institute, Jan 2001.
Department(s)
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Concrete; Polymer; Reinforcement; Rod, shear; Strength
International Standard Serial Number (ISSN)
0889-3241
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 American Concrete Institute, All rights reserved.
Publication Date
01 Jan 2001