چكيده لاتين :
Analysis and prediction of structural response to static or dynamic loading requires prediction of concrete response to variable load histories. The constitutive equations for the mechanical behavior ofconcrete capable ofseeing damage effects or crack growth procedure under loading/unloading/reloading was developed upon micro-plane .framework. The proposed damage formulation has been built on the basis offive fundamental types of stress/strain combinations, which essentially may occur on any of micro-planes. J.Model verification under different loading/unloading/reloading stress/strain paths has been examined. The proposed model is capable ofpresenting pre-failure history ofstress/strain progress on different predefined sampling planes through material. Many ofmechanical behavior aspects happen during plasticity such as induced anisotropy, rotation ofprincipal stress/strain axes, localization o.fstress/strain, and even failure mechanism are predicted upon a simple rational way and can be presented
