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Size and Shape Effects on Strength and Ultimate Strain in FRP Confined Rectangular Concrete Columns

Published online by Cambridge University Press:  16 October 2012

F.-Y. Yeh  and
K.-C. Chang
F.-Y. Yeh
Affiliation:
Department of Civil Engineering, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
K.-C. Chang*
Affiliation:
Department of Civil Engineering, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
*
* Corresponding author ([email protected])
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Abstract

This paper is concerned with the effects of column size, carbon fiber-reinforced plastics (CFRP) volumetric ratio, column side to corner radius ratio and column side aspect ratio on the confinement efficiency of rectangular concrete columns confined with CFRP. The confined concrete nonlinear constitutive relationships are adopted which account for concrete under unequal lateral confining stresses under multiaxial stress conditions. A stiffness reduction procedure upon concrete cracking or crushing is also proposed. The finite element model is initially confirmed by comparing its numerical solutions with the experimental results for various parameters. The effects of above parameters on the peak strength and ultimate strain of the confined concrete are then parametrically studied. The test results and results of the parametric study indicate that the column axial compressive strength and ultimate strain increase with CFRP volumetric ratio, but decrease as the column side to corner radius ratio or the column side aspect ratio increases. For columns of a particular corner radius and CFRP volumetric ratio, the column axial compressive strength and ultimate strain decrease as column size and column side to corner radius ratio increases.

Keywords

CFRPStrength of confined concreteUltimate strainShape effect and size effect
Type
Articles
Information
Journal of Mechanics , Volume 28 , Issue 4 , December 2012 , pp. 677 - 690
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2012

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References

REFERENCES

1.Chang, K. C., Chang, S. P. and Liu, K. Y., “Seismic Retrofit Study of Rectangular RC Columns Lap Spliced at Plastic Hinge Zone,” Proceeding of 16th KKCNN Symposium on Civil Engineering, Gyeongju, Korea, pp. 221–227 (2003).Google Scholar
2.Li, Y. F. and Sung, Y. Y., “Seismic Repair and Rehabilitation of a Shear-Failure Damaged Circular Bridge Column Using Carbon Fiber Reinforced Plastic Jacketing,” Canadian Journal of Civil Engineering, 30, pp. 819–829 (2003).Google Scholar
3.Li, Y. F. and Sung, Y. Y., “A Study on the Shear-failure of Circular Sectioned Bridge Column Retrofitted by Using CFRP Jacketing,” Journal of Reinforced Plastics and Composites, 23, pp. 811–830 (2004).Google Scholar
4.Vivo, L. D. and Rosati, L., “Ultimate Strength Analysis of Reinforced Concrete Section Subject to Axial Force and Biaxial Bending,” Computer Methods in Applied Mechanics and Engineering, 166, pp. 261–287 (1998).Google Scholar
5.Luccioni, B. M. and Rougier, V. C., “A Plastic Damage Approach for Confined Concrete,” Computers & Structures, 83, pp. 2238–2256 (2005).Google Scholar
6.Yeh, F. Y. and Chang, K. C., “Confinement Efficiency and Size Effect of FRP Confined Circular Concrete Columns,” Structural Engineering and Mechanics, 26, pp. 127–150 (2007).Google Scholar
7.Montoya, E., Vecchio, F. J. and Sheikh, S. A., “Numerical Evaluation of the Behaviour of Steel- and FRP-confined Concrete Columns Using Compression Field Modeling,” Engineering Structures, 26, pp. 1535–1545 (2004).Google Scholar
8.Wu, Y. F. and Wei, Y. Y., “Effect of Cross-Sectional Aspect Ratio on the Strength of CFRP-Confined Rectangular Concrete Columns,” Engineering Structures, 32, pp. 32–45 (2010).Google Scholar
9.Barrington, J., Dickson, D., Bisby, L. and Stratford, T., “Strain Development and Hoop Strain Efficiency in FRP Confined Square Columns,” American Concrete Institute, ACI Special Publication, 1, SP, pp. 147–166 (2011).Google Scholar
10.Elsanadedy, H. M., Al-Salloum, Y. A., Alsayed, S. H. and Iqbal, R. A., “Experimental and Numerical Investigation of Size Effects in FRP-Wrapped Concrete Columns,” Construction and Building Materials, 29, pp. 56–72 (2012).Google Scholar
11.Kupfer, H., Hilsdrof, H. K. and Rusch, H., “Behavior of Concrete Under Biaxial Stresses,” Journal of American Concrete Institute, 66, pp. 656–666 (1969).Google Scholar
12.Mander, J. B., Priestley, M. J. N. and Park, R., “Theoretical Stress Strain Model for Confined Concrete,” Journal of Structural Engineering, ASCE, 114, pp. 1804–1826 (1988).Google Scholar
13.Chang, G. A. and Mander, J. B., “Seismic Energy Based Fatigue Damage Analysis of Bridge Columns: Part I – Evaluation of Seismic Capacity,” Technical Report NCEER-94–0006, NCEER, State University of New York, Buffalo, N.Y., pp. 3-32–3-34 (1994).Google Scholar
14.Yunus, S. M. and Kohnke, P. C., “An Efficient Through-Thickness Integration Scheme in an Unlimited Layer Doubly Curved Isoparametric Composite Shell Element,” International Journal for Numerical Numerical Methods in Engineering, 28, pp. 2777–2793 (1989).Google Scholar
15.Willam, K. J. and Warnke, E. P., “Constitutive Model for the Triaxial Behavior of Concrete,” Proceeding of the International Association for Bridge and Structural Engineering, 19, pp. 1–30 (1975).Google Scholar
16.Tsai, S. W. and Hahn, H. T., Introduction to Composite Materials, Section 7.2, Technomic Publishing Company (1980).Google Scholar
17.Tsai, S. W., Composites Design, Third Edition, Section 11.6, Think Composites, Dayton, Ohio (1987).Google Scholar
18.ABAQUS, Inc., ABAQUS Theory Manual and Analysis User's Manual, Version 6.5, Providence, Rhode Island (2005).Google Scholar
19.ASTM C39, Standard Test Method for Compressive Strength of Cylindrical Specimens, Annual book of ASTM Standards 2005, Vol. 04.02, American Society for Testing Materials, West Conshohocken, PA.Google Scholar
20.Rochette, P. and Labossiere, P., “Axial Testing of Rectangular Column Models Confined with Composites,” Journal of Composites for Construction, 4, pp. 129–136 (2000).Google Scholar