2019 CSCE Annual Conference - Laval (Greater Montreal)

2019 CSCE Annual Conference - Laval (Greater Montreal) Conference

High Strength Concrete Columns Reinforced with FRP Bars and Ties under Eccentric loads

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Dr. Brahim Benmokrane, Universite de Sherbrooke (Presenter)
Mr. Ashraf Salah-eldin
Dr. Hamdy M. Mohamed, University of Sherbrooke

FRP) technology. Basalt FRP (BFRP) has been recently developed and received wide attention, in addition to the commonly used composites based on glass (GFRP) and carbon (CFRP) fibers.  Considerable experimental research work has been conducted to evaluate the flexural and shear performance of concrete members reinforced with BFRP bars. In contrast, no research seems to have investigated concrete members reinforced with BFRP bars under eccentric loads. This paper presents the results of a research program investigating the use of new developed Sand-coated BFRP bars and ties in axial-flexural members made with high strength concrete (HSC). Full-scale columns with a 400400 mm cross section and 2,000 mm in height were constructed and tested. The test variables were the eccentricity-to-width ratio and type of reinforcement. The test results indicate that the specimens rein­forced of BFRP bars and ties under different levels of eccentricity behaved simi­larly to their steel reinforced concrete counterparts. An analytical study was conducted to predict the axial-flexural capacity. A parametric study was introduced to examine the effect of increasing the reinforcement ratio and concrete strength. Moreover, the effective flexural stiffness was estimated and plotted at different load levels and compared with the design equations. The results of this investigation can be considered as a fundamental step toward code provisions for using BFRP bars and ties as internal reinforcement in bridge pier and pile applications.