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Simplified Model for the Stress-Strain Relationship of Confined Concrete
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 Title & Authors
Simplified Model for the Stress-Strain Relationship of Confined Concrete
Kim, Won-Woo; Mun, Ju-Hyun; Yang, Keun-Hyeok;
This study aims to develop a simple and rational stress-strain model of confined concrete in compression. Considering the confinement effect provided by the lateral reinforcement, the specified properties of confined concrete was formulated using regression analysis of 123 data sets as follows: modulus of elasticity, strength gain factor, strains at peak stress and 85% of the peak stress on the descending branch. Numerical and parametric analysis were carried out to derive equations for the key parameter determining the slopes of the ascending and descending branches of the stress-strain curves of confined concrete. The reliability of the developed model is examined using a normalized root mean-square error obtained from a comparison of model estimates with the experimental data. The proposed model gives superior accuracy and mathematical simplicity.
Confined concrete;Stress-strain relationship;Lateral reinforcement;Confinement effect;
 Cited by
중심 압축하중을 받는 RC 기둥에서 V형 보조띠철근의 횡구속 효과,양근혁;

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