119- مقاله السیور- Modeling of Stress-Strain Relationships for Concrete
مقاله السیور- Modeling of Stress-Strain Relationships for Concrete
شماره فایل : 119
Modeling of Stress-Strain Relationships for Concrete Damaged by Freezing and Thawing Cycles
Introduction
The irreversible tensile deformation and crack during FTC affect the mechanical properties of concrete, namely strength, stiffness, and deformation capacity of concrete [1,2]. Ideally the changes in the material properties resulting from FTC damage should therefore be considered in the stress analysis of reinforced concrete structures that have been affected by FTC. As a result development of pertinent constitutive models that recognize the effect of FTC damage is necessary. In this study, stress-strain models for FTC damaged concrete in compression and tension are presented. It is intended for both simple calculation of sectional member strength
and finite element analysis.Concrete in real structures is subjected to combined actions of FTC and mechanical loadings. As the first
stage, developing the models in the simplified condition in which the concrete is first subjected to FTC then mechanical loading were considered. This is because the most of concrete in the real structures is subjected to rather small tensile and compressive stresses in comparison with its strengths. The model for more general cases of combined actions will be studied in the next stage.