An anisotropic elasto-damage model for predicting the response of concrete subjected to monotonic and fatigue loading is presented in this research. The model utilizes a concrete appropriate damage-effect tensor M in constructing the constitutive equations using the concept of multiple bounding surfaces. One of the salient features is the introduction of a bounding surface that constrains the elliptical movement of the limit fracture surface. The model after calibration is shown to predict the

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... onotonic, comprehensive uniaxial stress strain path for concrete of various strengths as well as S-N curves depicting the fatigue response of concrete for uniaxial and biaxial loading. A concept of residual strength determination based on continuum damage formulation is also introduced.