초록 close

In this study, 24 high-strength concrete dapped-end beams were tested to study the effects ofthe amount of main dapped-end reinforcement, the nominal shear span-to-depth ratio, and the concretestrength on the shear strength of dapped-end beams. Test results indicate that the shear strength of dappedends increases with the increase in the amount of main dapped-end reinforcement and the concretestrength. The shear strength of dapped-end beam increases with the decrease of nominal shear span-to-depth ratio. A simplified method for determining the shear strength of reinforced concrete dapped ends isalso proposed in this paper. The shear strengths predicted by the proposed method and the approach ofPCI Design Handbook are compared with test results. The comparison shows that the proposed methodcan more accurately predict the shear strength of reinforced concrete dapped-end beams than the approachof PCI Design Handbook.