A bounding surface model for concrete

Abstract A rate-independent, three-dimensional bounding surface model for concrete is developed. The model adopts a scalar representation of the damage related to the strain and stress states of the material. The salient features of the model are: (1) a bounding surface in stress space that shrinks uniformly as damage accumulates, and (2) material parameters that depend on damage and the distance between the current stress point and the bounding surface. Satisfactory prediction is obtained of the multiaxial compression behavior of concrete in monotonic and cyclic loadings. The model is relatively simple and incrementally linear, and its finite element implementation appears promising.

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