1991 年 2 巻 1 号 p. 1-14
Concrete stubs confined in circular steel tubes have been tested. Based on the test results, the triaxial stress-strain behavior, and the failure criteria of confined concrete have been studied. The failure of confined concrete is defined as the point at which the volumetric strain changes to expanding. Failure criteria of confined concrete expressed in strains, and in stresses are proposed.