Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
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Simplified Model for the Stress-Strain Relationship of Confined Concrete

구속된 콘크리트의 응력-변형률 관계를 위한 단순모델 제시

  • 김원우 (경기대 일반대학원 건축공학과) ;
  • 문주현 (경기대 일반대학원 건축공학과) ;
  • 양근혁 (경기대 플랜트.건축공학과)
  • Received : 2015.02.04
  • Accepted : 2015.04.13
  • Published : 2015.04.30
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Abstract

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.

Keywords

Acknowledgement

Supported by : 경기대학교 대학원

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