JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Simplified Moment-Curvature Relationship Model of Reinforced Concrete Columns Considering Confinement Effect
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Simplified Moment-Curvature Relationship Model of Reinforced Concrete Columns Considering Confinement Effect
Kwak, Min-Kyoung; Yang, Keun-Hyeok;
  PDF(new window)
 Abstract
The present study simplified the moment-curvature relationship to straightforwardly determine the flexural behavior of reinforced concrete (RC) columns. For the idealized column section, moments and neutral axis depths at different stages(first flexural crack, yielding of tensile reinforcing bar, maximum strength, and 80% of the maximum strength at the descending branch) were derived on the basis of the equilibrium condition of forces and compatibility condition. Concrete strains at the extreme compression fiber beyond the maximum strength were determined using the stress-strain relationship of confined concrete, proposed by Kim et al. The lateral load-displacement curves converted from the simplified moment-curvature relationship of columns are well consistent with test results obtained from column specimens under various parameters. The moments and the corresponding neutral axis depth at different stages were formulated as a function of longitudinal reinforcement and transverse reinforcement indices and/or applied axial load index. Overall, curvature ductility of columns was significantly affected by the axial load level as well as concrete compressive strength and the amount of longitudinal and transverse reinforcing bars.
 Keywords
column;moment-curvature relationship;lateral force-lateral displacement relationship;confinement;curvature ductility;
 Language
Korean
 Cited by
 References
1.
Seo, S.Y., and Ham, J.H., "Experimental Study on the Confinement Effect of Headed Cross Tie in RC Column Subjected to Cycling Horizontal Load", Korea Institute for Structural Maintenance and Inspection, Vol.16 No.5, 2012, pp.1-10.

2.
Kim, J.K., Han, B.S., and Shin, S.W., "Ductility Capacity of Ultra-High Strength R/C Tied Columns Considering the Axial Load Ratio and Configuration of Transverse Reinforcement", Architectural Institute of Korea, Vol.25, No.1, 2009, pp. 3-11.

3.
ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318M-11) and Commentary, American Concrete Institute, Farmington Hills, Michigan, USA, 2011, p.503.

4.
Lee, Y.H., Chung, B.H., and Chung, H.S., "A Study on Confinement Effectiveness of Lateral Ties in RC Columns under Axial Loads", Architectural Institute of Korea, Vol.16, No.12, 2000, pp.3-11.

5.
Watson, S., and Park, R., "Simulated Seismic Load Tests on Reinforced Concrete Columns", Journal of Structural Engineering, ASCE, Vol.120 No.6, 1994, pp.1825-1849. crossref(new window)

6.
Razvi, S., and Saatcioglu, M., "Confinement Model for High-Strength Concrete", Journal of Structural Engineering, ASCE, Vol.125, No.3, 1999, pp.281-289. crossref(new window)

7.
Park, S.Y., and Lee, Y.H., "A Clip Confinement Effect on the Behavior of Concrete Column subjected to High Axial and Reversed Cyclic Lateral Loads", Architectural Institute of Korea, Vol.24, No.10, 2008, pp.19-28.

8.
Sim, J.I., Yang, K.H., and Byun, H.Y., "Flexural Capacity and Ductility of Reinforced Concrete Columns Strengthened with Unbonded Wire Rope Units", Journal of the Korea Concrete Institute, Vol.21 No.2, 2009, pp.209-216.

9.
Razvi, S., and Saatcioglu, M., "Confinement Model for High-Strength Concrete", Journal of Structural Engineering, ASCE, Vol.125, No.3, 1999, pp.281-289. crossref(new window)

10.
Kang, S.M., and Park, H.G., "Moment-Curvature Relationship of Structural Walls with Confined Boundary Element", Journal of the Korea Concrete Institute, Vol.15, No.2, 2003, pp.281-288.

11.
Kwak, M.K., "Flexural Performance of Reinforced Concrete Columns with the Supplementary V-ties subjected to the Constant Axial Loads and Reversed Lateral Loads", MSc Thesis, Graduate School, Kyonggi University, 2016, p.142.

12.
Yang, K.H., Mun, J.H., Cho, M.S., and Kang, T.H.K., "A Stress-Strain Model for Various Unconfined Concrete in Compression", ACI Structural Journal, Vol.111, No.4, 2014, pp.819-826.

13.
Kim, W.W., Mun, J.H., and Yang, K.H., "Simplified Model for the Stress-Strain Relationship of Confined Concrete", Architectural Institute of Korea, Vol.16, No.5, 2012, pp. 1-10.

14.
Wallace, J.W., "Seismic Design of RC Structural Walls. Part I: New Code Format", Journal of Structural Engineering, ASCE, Vol.12, No.1, 1995, pp.88-101.

15.
Paulay, T., and Priestley, M.J.N., Seismic Design of Reinforced Concrete and Masonry Buildings, Wiley Interscience Publication, New Jersey, USA, 1992, p.768.

16.
Mun, J.H., and Yang, K.H., "Generalized Lateral Load-Displacement Relationship of Reinforced Concrete Shear Walls", Journal of the Korea Concrete Institute, Vol.26, No.2, 2014, pp.159-169. crossref(new window)

17.
Park, R., Priestley, M.H.N., and Gill, W.D., "Ductility of Square-Confined Concrete Columns", Journal of Structural Division, ASCE, Vol.108 No.ST4, 1982, pp.929-950.