抄録
The present paper is concerned with the characteristics of fracture criteria of concrete in multiaxial stress states, their representation and a proposal for design under such conditions.
The concepts of fracture surface in the processes of fracture initiation, subsequent fracture and final fracture were introduced first, and then the typical ways of representing each of these fracture surfaces were discussed by taking the generalized Griffith's criterion as an example.
Secondly, the experimental results of concretes together with cement paste and mortar under multiaxial stresses were obtained and compared. It was observed that all the results resemble each other when they are represented in terms of the stresses normalized by using the uniaxial compressive strength.
Finally, based on these results, the design criteria were proposed.
