Seismic Performance of Rehabilitated RC Framed Joints Strengthened with L Shaped FRP

Abstract:

This paper researches the rehabilitated effects of seismic damaged reinforced concrete (RC) interior framed joints externally strengthened with L shaped fiber reinforced polymer (FRP) laminates and the results show that FRPs can enhance the ultimate strength of the joints. However, the strain values calculated by the bending strength formula in American Concrete Institute (ACI) code and references of Chen and Teng are much higher than those obtained in the test. For this reason, the writers adopt the method by shear strengthening with FRP being sticked on two sides. The calculation results agree with the test results, which proves the arithmetic to be able to be used to analyze the mechanism performance of the internal framed joints externally strengthened with L shaped fibers.

Key words:seismic damage; beam column joint; L shaped fiber strengthening; seismic performance