Farzad Peyman - Department of Civil Engineering, QazvinBranch, Islamic Azad University Qazvin, Iran

The primary purpose of studying the behavior of concrete is to calculate its strength and deformation under environmental conditions and loading. In this regard, due to the structure and nature of concrete, non-isotropic in its experimental behavior at different loads is observed, considered in this research. Accordingly, by assuming a different linear elastic behavior in each loading increment and the experimental results, an attempt has been made to define a numerical linear-nonlinear behavior for concrete. Therefore, proportional numerical functions are defined based on the damage in the modulus of elasticity and the changes in the Poisson ratio of the concrete tested in monotonic loading types, the coefficients obtained from the related experimental results. The computational effects of these functions during the analytical method of the research cause the experimental behavior of concrete to be converted to numerical behavior. The validity of this numerical method is based on calibration and comparison with experimental results. In addition to hardening behavior, this numerical analysis can define softening behavior.

Concrete, Non-isotropic, Damage, Monotonic Loading, Hardening, Softening