Impact Testing of Reinforced Concrete Beams Shear-Strengthened with Fiber-Reinforced Polymer Wraps

摘要

The dynamic behavior of reinforced concrete (RC) beams shear-strengthened with externally bonded carbon fiber-reinforced polymer (CFRP) wraps under low-velocity impact loading was experimentally investigated. Twelve simply supported RC beam specimens classified into two groups according to stirrup ratios of 0 and 0.1% were tested using an instrumented drop-weight impact machine. The main variable was the center-to-center spacing of the CFRP wraps, which was retrofit at three levels from light, to critical, and to heavy strengthening. The dynamic responses of all the specimens are recorded and discussed in detail. Effects of the CFRP strip spacing and shear span-depth ratio on dynamic response of beam specimens are analyzed.