Oral Presentation , Page 42-50 (9) Full Text (2.39 MB)

Volume Title: 3rd International Conference on Civil Engineering: Development & Sustainability

¹Amr Abdallah ; ²Yasser Selmy; ³Ehab El-Salakawy

¹Civil Engineering Department, Assiut University, Assiut, Egypt

²Civil Engineering Department, Suez-Canal University, Ismailia, Egypt

³Department of Civil Engineering, University of Manitoba, Winnipeg, Manitoba, Canada

The current seismic design provisions for confinement reinforcement in fiber-reinforced polymer-reinforced concrete (FRP-RC) columns are overly conservative. One reason for that is the scarcity of research data. Despite the recent efforts to assess the confinement behavior in FRP-RC columns under simulated seismic loading, the effect of combined loading schemes incorporating torsion (e.g., C-bent bridge piers) is not experimentally addressed. This study investigates the behavior of three glass FRP (GFRP)-RC circular columns under earthquake-simulated loading including torsional effects. Two columns were confined by a GFRP spiral while discrete GFRP hoops were utilized to confine the other column. A sophisticated test setup was used to apply simultaneous axial loading and lateral drift reversals at a transverse eccentricity resulting in cyclic torque in addition to the shear and flexure load effects. While GFRP hoops with a lap splice equal to 60 times its cross-sectional diameter resulted in comparable behavior to spiral-confined GFRP-RC column when no torsional effects were present, better behavior was observed in this study for the GFRP-RC C-bent columns confined with spirals.

Glass fiber-reinforced polymer (GFRP); Torsion; Seismic; confinement; Spiral; Hoops

Structural and Construction Engineering