Abstract
Six RC beams were tested with second-layer bars cut off. Test variables were yield strength, cutoff length, number of bars, and length of specimens. The loading was anti-symmetric and cyclic. One of the specimens failed in bond splitting but the other specimens did not, although the observed bond stresses were much larger than the strengths specified by AIJ code. The following conclusions were obtained.
(1) Bond strength of cutoff bars in the second layer needs not be multiplied 0.6 as specified by AIJ code.
(2) To prevent bond failure after plastic cyclic deformation, bond stress of the remaining bars should be evaluated according to AIJ code.
