A macro-meso constitutive law for concrete having imperfect interface and nonlinear matrix

The overall behavior of concrete depends on its meso structures such as aggregate shape,interface status,and mortar matrix property.The two key meso structure characters of concrete,bond status of interface and nonlinear property of matrix,are considered in focus.The variational structure principle is adopted to establish the macro-meso constitutive law of concrete.Specially,a linear reference composite material is selected to make its effective behavior approach the nonlinear overall behavior of concrete.A...