2019 CSCE Annual Conference - Laval (Greater Montreal)

2019 CSCE Annual Conference - Laval (Greater Montreal) Conference

Seismic Behavior of GFRP-Reinforced Interior Slab-Column Connection under Gravity and Reversed-Cyclic Lateral Loading

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Dr. Brahim Benmokrane, Universite de Sherbrooke
Mr. Mohamed Eladawy, Université de Sherbrooke (Presenter)
Dr. Mohamed Hassan, Université de Sherbrooke

Flat plates are widely used in reinforced concrete (RC) structures due to their functional and economic advantages. In seismic zones, slab-column connections must possess adequate strength against punching shear failure during and after the earthquake occurrence and adequate ductility to undergo inelastic deformations without failure. As, to date, there is no research has conducted on seismic behavior of flat plate-column connection reinforced with fiber-reinforced polymer (FRP) bars. This paper aims at investigating the seismic behavior of GFRP-reinforced flat plate-column connection subjected to gravity and reversed cyclic lateral loading. The test specimens represented interior connections from a continuous prototype reinforced flat-plate structure with 5 × 5 m2 square panels. All slabs had identical geometries of 2500 × 2500 × 200 mm and monolithic with a 300-mm square column protruding 700 mm above and below the slab surfaces. The influence of the reinforcement type (steel and GFRP bars) on the punching shear behavior of tested connections is investigated. The seismic performance of the slab-column connections is evaluated on the basis of the experimentally recorded moment–lateral drift hysteretic relationships and mode of failure. The influence of the FRP reinforcement bars is found to be significant, with the tested slab-column connections exhibiting a larger lateral drift capacity compared with the companion slab reinforced with steel bars.