Experimental research on the deformation and failure of concrete under biaxial loading

In this paper, the biaxial loading experiment for concrete is performed. The boundary displacements of the specimen in two directions, as the governing variables, maintain certain ratios. Two failure modes are found, catastrophic rupture and gradual failure. The biaxial loads drop simultaneously in catastrophic rupture. And the fluctuation value of deformation rise rapidly before the catastrophic rupture occurs. This reveals a sign of localization under biaxial loading.