2015 CSCE Annual Conference Regina - Building on our Growth Opportunities

2015 CSCE Annual Conference Regina - Building on our Growth Opportunities Conference

GFRP-RC Columns under reversal-cyclic loading

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Mr. Mahmoud Ali, university of manitoba (Presenter)
Dr. Ehab El-Salakawy, University of Manitoba

Using fiber reinforced polymers (FRP) reinforcement as main reinforcement in reinforced concrete (RC) structures becomes a viable solution to steel corrosion-related problems. Unlike steel, FRP bars do not yield, instead, they exhibit high tensile strength along with linear elastic behaviour up to failure. However, it is well-documented that the inelastic behavior of steel in RC structures is common in dissipating earthquakes-induced energy. Accordingly, the performance of FRP-RC structures under seismic loading needs to be investigated.  The objective of this research project is to study the effect of using glass (G) FRP longitudinal and stirrup reinforcement on the performance of concrete columns under reversal cyclic loading. Two full-scale columns prototypes, with 1650-mm long and 350-mm square cross-section, were constructed and tested under simulated seismic load conditions. The column specimen represented part of first storey column between the foundation and point of contra-flexure; therefore, the heavy-reinforced footing was fixed to the laboratory strong floor to simulate rational fixity to the column. The experimental results showed that both GFRP and steel columns were successfully able to sustain drift ratios higher than the values required by both the American Concrete Institute and the National Building Code of Canada. This indicates that the GFRP-RC columns can successfully sustain the gravity load in the presence of the seismic excitations.