Abstract
Stress-strain relationship is the main parameter to identify the strength, ductility and behavior of the structure. Various constitutive models were created in order to simplify the analytical approach of concrete behavior. In this paper, the behavior of reinforced concrete column is modeled using Attard and Setunge�s (1996) and Mander�s (1988) stress-strain constitutive model. The appropriate model for reinforced concrete column was determined based on the existing experimental data. Two-dimensional simulation of reinforced concrete column using fiber-based cross-sectional analysis in MATLAB is sighted. And the performance of the reinforced concrete column from the experimental data is compared with the analysis result from the simulation. There are two comparation methods used in this research. The first method is to compare the linear regression with the reference line. The smallest degree between the linear regression and the referrence line is expected. The second method is to compare the Root Mean Square Defiation (RMSD) value. The smallest RMSD value is expected to get the most suitable constitutive model compared to the experimental data. From the computational process, it was found that Mander�s Constitutive model is preferaed to be used in further analysis problem concerning reinforced concrete column
Highlights
It is clearly important to have accurate information concerning the complete stress-strain curve of confined concrete in order to perform a reliable moment-curvature analysis to assess the available ductility of columns with various transverse reinforce arrangements [1].Mander et al [1] model was calibrated using a realistically sized test columns with longitudinal reinforcement and restrained concrete
The data consist of axial stress-strain relationship as the result of axial loading test in various rectangular reinforced concrete column
Fig .2 shows the discretized cross section of the reinforced concrete column meshed with the constant strain triangle (CST) element
Summary
It is clearly important to have accurate information concerning the complete stress-strain curve of confined concrete in order to perform a reliable moment-curvature analysis to assess the available ductility of columns with various transverse reinforce arrangements [1]. The stress-strain relationship based on empirical data is derived. These models depend on the effective area of the column core. The confinement model based on the triaxial test does not observe the assumption of cover spalling. The triaxial test replaces confinement of cylindrical specimen with fluid pressure compared to either spiral or column confinement. Whereas passive confinement depend on the lateral dilatation of the Comparison of Stress-Strain Relationship for Confined Concrete Using Two-Dimensional Fiber-Based Cross-Sectional Analysis axial load and the characteristics of the confining steel. To further investigate the effect of steel fiber on reinforced concrete column, numerical simulation using fiber-based nonlinear sectional analysis in MATLAB were used
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