Experimental Study of Eccentrically Loaded Columns Strengthened Using a Steel Jacketing Technique

Authors: Mohamed K. Elsamny, Adel A. Hussein, Amr M. Nafie, Mohamed K. Abd-Elhamed

Abstract:

An experimental study of Reinforced Concrete, RC, columns strengthened using a steel jacketing technique was conducted. The jacketing technique consisted of four steel vertical angles installed at the corners of the column joined by horizontal steel straps confining the column externally. The effectiveness of the technique was evaluated by testing the RC column specimens under eccentric monotonic loading until failure occurred. Strain gauges were installed to monitor the strains in the internal reinforcement as well as the external jacketing system. The effectiveness of the jacketing technique was demonstrated, and the parameters affecting the technique were studied.

Keywords: Reinforced Concrete Columns, Steel Jacketing, Strengthening, Eccentric Load.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1335872

References:

[1] J. Li, M. N. S. Hadi, "Behaviour of externally confined high-strength concrete columns under eccentric loading”, Composite Structures, vol. 62, pp. 145–153, 2003.
[2] Parvin, A. and Wang, W., "Behavior of FRP jacketed concrete columns under eccentric loading.” J. Composites for Construction, vol. 5 issue 3, 146–152, 2001.
[3] Bahaa T. M. and El-karmouty H. Z., "Behavior of sandwich FRP wrapped RC columns under eccentric loading”, Housing and Building Research Center, HBRC Journal, vol. 3 No. 2, 2007.
[4] Yuan X., Xia S., Lam L. and Smith S. T., "Analysis and behaviour of FRP-confined short concrete columns subjected to eccentric loading”, Journal of Zhejiang University SCIENCE, vol. 1, pp. 38-49, 2007.
[5] Benzaid, R., Chikh, N. E., & Mesbah, H., "Study of the compressive behavior of short concrete columns confined by fiber reinforced composite”, Arabian Journal for Science and Engineering, vol. 34(1B), pp. 15-26, 2009.
[6] Ramírez J. L., Bárcena J. M. , Urreta J. I., Sanchez J. A. , "Efficiency of short steel jackets for strengthening square section concrete columns", Construction and Building Materials, vol 11, pp 345-352, 1997.
[7] Sakino, K. and Sun, Y., "Steel jacketing for improvement of column strength and ductility”, 12WCEE 2000: 12th World Conference on Earthquake Engineering, Auckland, New Zealand, 2000.
[8] Badr, M. R., "Experimental Behavoir Of Reinforced Concrete Columns Strengthened By Steel Jacket", HBRC Journal, Housing And Building National Research Center, Cairo, Egypt, vol.2, No. 2, 2006.
[9] Calderón, P. A., Adam, J. M., Ivorra, S., Pallarés, F. J. And Giménez, E., "Design strength of axially loaded rc columns strengthened by steel caging", Journal of Materials and Design, vol. 30, pp. 4069–4080, 2009.
[10] Giménez, E., Adam, J. M., Ivorra, S., And Calderón, P. A., "Influence of strips configuration on the behaviour of axially loaded rc columns strengthened by steel angles and strips", ", Journal of Materials and Design, vol. 30, pp. 4103–4111, 2009.
[11] Elsamny, M. K., Ibrahim, M. A., Elesnawi, H. H. and Oudah, H. K., "Behaviour of steel jackets used in strengthening columns subjected to eccentric loading", Journal of Al Azhar Universty Engineering Sector vol. 6 No. 19, pp. 493-514, 2011.
[12] Chapman, J. R. and Driver, R. G., "Behavior of collared concrete columns under concentric or eccentric loads”, Structural Engineering Report 263, Department of civil and environmental engineering, University of Alberta, Canada, 2006.
[13] Abd-Elhamed M. K. "Study of reinforced concrete columns due to eccentric and lateral loads” Ph. D. Thesis, Civil Engineering Department, Azhar University, Cairo, Egypt, 2010.