Compressive Behavior of Fiber Reinforced Concrete Columns Rehabilitated with CFRP Warps
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Abstract
Over the last few years, there has been a worldwide increase in the use of composite materials for rehabilitation of deficient reinforced concrete structures. One important application of this technology is the use of Carbon Fiber Reinforced Polymer (CFRP) jacket to provide external confinement of reinforced concrete columns. Square concrete column specimens 100×100×1000 mm with concrete
compressive strength of about 30 and 50 MPa, steel fiber volume fraction 0%, 0.5%, 0.75%, and percentage of longitudinal reinforcement 2.01%, 3.14% and 4.52% were tested until failure in previous research. In this research seven tested columns were repaired and rehabilitated using one layer of CFRP flexible wraps and tested to determine their ultimate load carrying capacity. A comparison between the behavior of column specimens before rehabilitation and after rehabilitation was carried out. The result
show that high strength concrete (HSC) columns show reduction in the maximum load carrying capacity of about 2% - 21%, while the deflection at maximum load significantly increases relative to concrete columns before rehabilitation.
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References
ACI Committee 211.1,“Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete”, 1991.
Benzaid, R., Chikh, N.E. and Mesbah, H., “Behaviour of Square Concrete Columns Confined with GFRP Composite Warp”, Journal
of Civil Engineering and Management, Vol.14, No.2, 2008, PP.115-120.
Benzaid, R., Chikh, N.E. and Mesbaah, H., “Study of the Compressive Behavior of Short Concrete Columns Confined by Fiber Reinforced
Composite”, The Arabian Journal for Science and Engineering, Vol.34, No.113, April 2009, PP.15-26.
Chikh, N., Gahmous, M. and Benzaid, R., “Structural Performance of High Strength Concrete Columns Confined with CFRP Sheets”,
Proceedings of the Word Congress on Engineering Vol.III, July, 2012, London, U.K.
Khalil, W.I., Gorgis, I.N. and Mahdi, Z.r., “Behavior of High Performance Fiber Reinforced Concrete Columns”, ARPN Journal of Engineering
and Applied Science, Vol.7, No.11, Nov.2012, PP.1455-1467.
Li, G., Kidane, S., Pang, S.S., Helms, S.E., and Stubblefield, M.A.,“Investigation into FRP Repaired RC Columns”, Composite Structures,
No.62, 2003, PP.83-89.www.ivsl.org
Nicolae, N., Gabriel, O., et al.,“Fibre Reinforced Polymer Composites as Internal and External Reinforcement for Building Elements”, Technical
University, Jassy, Department of civil and Industrial Engineering, March, 2008.
Rai, G., “New and Emerging Technologies for Retrofitting and Repairs”. www.rminternational.co.in/pdf-folder/Newtechnologi
Sadeghian, P. and Rahai, A.R., “Strength and Ductility of Unreinforced Concrete Columns Confined With CFRP Composites Under Uniaxial
Loading”, Concrete Repair, Rehabilitation and Retrofitting, London, 2009.
Saravanan, J., Suguna, K. and Raghunath, P. N., “Confined High Strength Columns: An Experimental Study”, American Journal of
Engineering and Applied Sciences, Vol.3, No.1, 2010, PP.133-137.
Sheikh, S.A., “Performance of Concrete Structures Retrofitted with Fiber Reinforced Polymers”, Engineering Structures, No.24, 2002, PP.869-879.www.ivsl.org
Toutanji, H.A., Han, M., and Matthys, S., “Axial Load Behavior of Rectangular Concrete Columns Confined with FRP Composites”, FRPRCS-8,
University of Patras, Patras, Greece, July, 2007, PP.1-10.
Wang, L.M. and Wu, Y.F., “Effect of Corner Radius on the Performance of CFRP-Confined Square Concrete Columns: Test”, Engineering
Structures, 30, 2008, PP.493-505