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Title: Seismic Performance of Interior GFRP-RC Beam-Column Joints

Author(s): Shervin Khalili Ghomi and Ehab F. El-Salakawy

Publication: Symposium Paper

Volume: 327


Appears on pages(s): 10.1-10.18

Keywords: Beam-column joints; Glass fiber reinforced polymer (GFRP); Joint shear ratio; Reinforced concrete; Seismic effect.

DOI: 10.14359/51713330

Date: 11/1/2018

Two full-scale interior beam-column joints reinforced with Glass Fibre Reinforced Polymers (GFRP) were constructed and tested under reversal cyclic loading. Two levels of joint shear ratios were investigated; 1.3 and 1.5 times the square root of the concrete compressive strength (√f’c.). The specimens were isolated from assumed points of contra-flexure at mid-height of the columns and mid-span of the beams. Based on the obtained results, it was concluded that interior beam-column joints reinforced with GFRP bars and stirrups can withstand joint shear stress ratio of 1.5√f’c when the column is reinforced according to the confinement requirements of the Canadian standards for FRP-reinforced concrete (RC) building structures. Due to high tensile strength and low modulus of elasticity of GFRP, GFRP-RC beam-column joints can withstand large lateral deformations without exhibiting sudden failure due to bar rupture. This deformable behaviour indicates that GFRP-RC frames can be used in seismically active regions.