STIFFNESS DEGRADATION OF TENSION SOFTENING BEHAVIOR IN CONCRETE
N. Nomura and H. Mihashi Faculty of Engineering, Tohoku University, Sendai 980, Japan.
The degrading stiffness and local fracture energy of concrete with normal, middle and high strength have been studied by using compact tension tests under a cyclic loading. The compliance of higher strength concrete increases with the advance of fictitious crack. The local fracture energy defined by the fictitious crack advance is possible to represent the properties of fracture process zone, which is attributed to concrete strength.