ADVANCES IN FRACTURE CRITERIA OF MIXED MODEL FRACTURE IN CONCRETE

Mixed-model fracture is a prevailing phenomena inconcrete. At present, there are two main approaches in describing the fracturebehavior of concrete structures: One using stress intensity factor(SIF) asthe main fracture parameter, and the other being energy based.Theoretically, these two methods should be consistent with each other. The basic assumptions, standards and application ranges ofdifferent fracture criteria are discussed. Furthermore, bycomparing results in tests, themerits and demerits of different fracture criteria are discussed.