The performance of rehabilitated reinforced concrete beam-column joints was compared with the response of existing joints designed to preseismic codes to assess proposed rehabilitation techniques. Six beam-column subassemblies with nonductile reinforcement detailing were tested. The joints were subjected to quasi-static load that simulates seismic forces. The first three specimens had inadequate anchorage length of the bottom beam bars. Two of them were strengthened by using carbon-fiber-reinforced polymer sheets attached to the bottom beam face and then tested. The other three specimens had no steel ties installed in the joint zone, in addition to inadequate anchorage length of the beam bars. Two of the beam-column joints were strengthened by glass-fiber-reinforced polymer jackets of the joint zone and steel rods or plates. The rehabilitation techniques were found effective in eliminating the brittle joint shear and steel bar bond-slip failure modes, and ductile beam hinging instead occurred.
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Journal of Composites for ConstructionAugust 2008
Journal of Composites for ConstructionApril 2010
Professor, Dept. of Civil Engineering, McMaster Univ., Hamilton, ON, Canada L8S 4L7.
Postdoctoral Fellow, Dept. of Civil Engineering, McMaster Univ., Hamilton, ON, Canada L8S 4L7.
Received: November 12, 2004
Accepted: February 15, 2005
Published online: October 01, 2005
© 2005 ASCE