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In order to get the tensile strength of wet screened, three-graded, fully-graded concrete the concrete is considered as a three-phase composite composed of matrix, aggregate and the interface between the two; the random aggregate model is conctructed by using Monte-Carlo method. The bilinear damage evolution model is adopted to describe the meso-element's damage devolution. The axial tension test for the one-graded concrete is studied by the nonlinear FEM; homogenization is verified in the axial tension test for the two-graded concrete; homogenization is applied in the axial tension test for the fully-graded concrete. Furthermore, tensile strengths of fully-graded concrete. The results of numerical simulation meet experiment results well.
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