Title:
Punching Shear Behavior of Glass Fiber-Reinforced Polymer-Reinforced Concrete Slab-Column Interior Connections
Author(s):
Ahmed H. Hussein and Ehab F. El-Salakawy
Publication:
Structural Journal
Volume:
115
Issue:
4
Appears on pages(s):
1075-1088
Keywords:
glass fiber-reinforced polymers (GFRPs); headed studs; high-strength concrete (HSC); shear reinforcement; shear strength; slab-column connections
DOI:
10.14359/51702134
Date:
7/1/2018
Abstract:
This paper deals with punching shear behavior of flat plates reinforced with glass fiber-reinforced polymer (GFRP) reinforcing bars. Six full-scale reinforced concrete (RC) slab-column interior connections were constructed and tested to failure. Two variables were investigated; the flexural reinforcement ratio when high-strength concrete (HSC) is used and the type of GFRP shear reinforcement (headed studs and corrugated bars) when normal- strength concrete (NSC) is used. All specimens were tested under concentric shear force and unbalanced bending moment with a constant moment-to-shear
ratio. Increasing the reinforcement ratio increased punching capacity and post-cracking stiffness for HSC connections. Both types of shear reinforcement increased the punching capacity and deflection of NSC connections. Test results were compared with the predictions of the available fiber-reinforced polymer (FRP) design provisions in North American codes.