SEISMIC UPGRADING OF SHEAR-CRITICAL RC FRAMES USING CFRPCONFINED BEAM HAUNCHES
In the past earthquakes, the shear failure of beam-column joints was a main reason for the collapse of reinforced concrete (RC) frames that had been built according to previously non-seismic provisions. But the existence of transverse beams brings a major obstacle to directly strengthen the beam-column joints in space frames. A retrofit method using the beam haunches confined by carbon fiber reinforced polymer (CFRP) sheets was designed for this difficult task. Two frame models were constructed and one of them was upgraded using the technique. The results of quasi-static tests showed that the technique was successful in improving the seismic behaviour of RC frames, which were drawn from the comparison of test results between control and strengthened ones in aspect of failure modes, load versus displacement curves, strength and stiffness degradation, and cumulative energy dissipation capacity.
Fiber reinforced polymers Concrete structures Frame structures Beam columns Reinforcement
Bu Wang Pu Wang
College of Civil Engineering, Changan University, Xian 710061, P.R. China Postdoctoral Workstation Postdoctoral Workstation, Shanghai Research Institute of building science, Shanghai 200032, P.R. Chi
国际会议
第十届国际结构工程青年学者研讨会(The Tenth International Symposium on Structural Engineering for Young Experts)
长沙
英文
1391-1396
2008-10-19（万方平台首次上网日期，不代表论文的发表时间）