Browse > Article
http://dx.doi.org/10.4334/JKCI.2013.25.1.019

Evaluation of Axial Strains of Reinforced Concrete Columns  

Lee, Jung-Yoon (Dept. of Architectural Engineering, Sungkyunkwan University)
Kim, Min-Ok (Dept. of Architectural Engineering, Sungkyunkwan University)
Kim, Hyung-Beom (Dept. of Architectural Engineering, Sungkyunkwan University)
Publication Information
Journal of the Korea Concrete Institute / v.25, no.1, 2013 , pp. 19-28 More about this Journal
Abstract
The longitudinal axial strain in the plastic hinge region of reinforced concrete (RC) columns influences on the structural behavior of RC structures subjected to reversed cyclic loading. This strain decreases the effective compressive strength of concrete and increases the lateral displacements between stories by causing the elongation of member length. This paper investigated the effects of the axial force on the elongation of a RC member by using a sectional analysis of RC members. The analytical and experimental results indicated that the axial force decreased the axial strain in the plastic hinge region of RC columns. In this study, a model was proposed to predict the axial strain of RC columns. The proposed model considering the effects of axial force ratio consisted of three path types ; Path 1-loading region, Path 2-unloading region, and Path 3-reversing cyclic loading region. The axal strains predicted by the proposed model were compared with the test results of RC columns with various axial force ratios, and agreed reasonably with the observed longitudinal strains.
Keywords
axial strain; reversed cyclic loading; reinforced concrete columns; axial force; plastic hinge;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Lee, J. Y. and Watanabe, F., "Predicting the Longitudinal Axial Strain in the Plastic Hinge Regions of Reinforced Concrete Beams Subjected to Reversed Cyclic Loading," Engineering Structures, Vol. 25, 2003, pp. 927-939.   DOI   ScienceOn
2 Na, H. J., "Shear Deformability of Reinforced Concrete Beams subjected to Cyclic Loading," Master Dissertation, Sungkyunkwan University, 2006, pp. 30-67.
3 Eom, T. S. and Park, H. G., "Longitudinal Elongation of Slender Reinforced Concrete Beams Subjected to Cyclic Loading," Journal of the Korea Concrete Institute, Vol. 20, No. 6, 2008, pp. 785-796.   과학기술학회마을   DOI   ScienceOn
4 Paulay, T., "Seismic Design of Concrete Structures: The Present Needs of Societied," Proceedings of 11th World Conference on Earthquake Engineering, Paper No. 2001, Acapulco, Mexico, 1996.
5 Park, R. and Paulay, T., Reinforced Concrete Structures, John Wiley and Sons, New York, 1975, 769 pp.
6 Ghali, A. and Favre, R., Concrete Structures : Stresses and Deformations, Chapman and Hall, New York, 1986, 348 pp.
7 Mugurma, H. and Watanabe, F., "Ductility Improvement of High Strength concrete Columns with Lateral Confinement," High-Strength Concrete, 2nd International Symposium, SP-121, ACI, 1990, pp. 47-60.
8 Ramberg, W. and Osgood, R., "Description of Stress- Strain Curves by Three Parameters," Thechnical Note 902, National Advisory Committee for Aeronautice, 1943.
9 Yokoo, Y. and Nakamura, T., "Non-Stationary Hystererctic Uniaxial Stress-Strain Relation of a Wide-Flange Steel," Transactions of AIJ, No. 260, 1977, pp. 71-80.
10 Park, J. W., "Plastic Hinge of Reinforced Concrete Columns Failing in Shear after Flexural Yielding," Master Dissertation, Sungkyunkwan University, 2008, 68 pp.
11 New Zealand Concrete Society, Guidelines for the Use of Structural Precast Concrete in Buildings, New Zealand Concrete Society, 1991, 173 pp.
12 Japan Concrete Institute, JCI Colloquium on Ductility of Concrete Structures and Its Evaluation, 1998, 264 pp.
13 Paulay, T. and Priestley, M. J. N., Seismic Design of Reinforced Concrete and Masonry Buildings, John Wiley and Sons, New York, 1992, pp. 136-142.