Ali Mohamed Kamel Ali Shaalan2022-05-182022-05-184942https://drepo.sdl.edu.sa/handle/20.500.14154/1429An 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 monotonic, 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 concenThesis