International Journal of Nonlinear Analysis and Applications
The effect of FRP characteristics on the behavior of square columns under eccentric loads
Document Type : Research Paper
Authors
Department of Civil Engineering, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran
Abstract
Modelling the stress-strain relationship of FRP confined concrete is of vital importance in predicting the structural behaviour of confined concrete columns. In recent years the axial stress-strain behaviour of confined concrete under concentric loading is well established, but the behaviour under eccentric loading when axial and bending loads are combined is not well understood. Adding FRP materials to upgrade deficiencies of structural components can save lives by preventing collapse, reducing the damage, and the need for their costly replacement. The retrofit with FRP materials with desirable properties provides an excellent replacement for traditional materials, such as steel jackets, to strengthen the reinforced concrete. Existing studies have shown that the use of FRP materials restores or improves the column's original design strength for possible axial, shear, or flexure and in some cases allows the structure to carry more load than it was designed for. This paper summarizes the results of a research program to study the fundamental stress-strain behaviour of concrete confined by various types of fibre-reinforced polymer (FRP) composite jackets. By using three different types of FRP sheets with different mechanical characteristics, it can be concluded that the e/d ratio in all cases has the most effect on the square column behaviour.
Keywords
1] K. Abdelrahman and R. El-Hacha, Behavior of large-scale concrete columns wrapped with CFRP and SFRP sheets, J. Composit. Construct. 16 (2012), no. 4, 430–439.
[2] H.S. Al-Nimry and R.A. Al-Rabadi, Axial–flexural interaction in FRP-wrapped RC columns, Int. J. Concrete Struct. Mater. 13 (2019), no. 1, 1–19.
[3] J. Bai, Advanced fibre-reinforced polymer (FRP) composites for structural applications, Elsevier, 2013.
[4] C.E. Bakis, L.C. Bank, V. Brown, E. Cosenza, J.F. Davalos, J.J. Lesko, A. Machida, S.H. Rizkalla and T.C. Triantafillou, Fiber-reinforced polymer composites for construction-state-of-the-art review, J. Composit. Construct. 6 (2002), no. 2, 73–87.
[5] L. Bisby and M. Ranger, Axial–flexural interaction in circular FRP-confined reinforced concrete columns, Construct. Build. Mater. 24 (2010), no. 9, 1672–1681.
[6] L. Bisby and B. Williams, An introduction to FRP strengthening of concrete structures, ISIS Educ. Module 4 (2004), 1–39.
[7] W.F. Chen, Plasticity in reinforced concrete, J. Ross Publishing, 2007.
[8] T. El Maaddawy, Post-repair performance of eccentrically loaded RC columns wrapped with CFRP composites, Cement Concrete Composit. 30 (2008), no. 9, 822–830.
[9] C. Faella, R. Realfonzo and G. Rizzano, Experimental behaviour of R/C columns confined by FRP, 2nd Fib Congress, Naples, Italy, 2006, pp. 5–8.
[10] B.A.L. Fanggi and T. Ozbakkaloglu, Square FRP–HSC–steel composite columns: Behavior under axial compression, Engin. Struct. 92 (2015), 156–171.
[11] S.E. Gunaslan and A. Karasin, Confining concrete columns with FRP materials, Eur. Sci. J. 2017 (2017), 464–470.
[12] M.N. Hadi, Comparative study of eccentrically loaded FRP wrapped columns, Composite Struct. 74 (2006), no. 2, 127–135.
[13] Z.A. Hashem and R.L. Yuan, Short vs. long column behavior of pultruded glass-fiber reinforced polymer composites, Construct. Build. Mater. 15 (2001), no. 8, 369–378.
[14] Y. Hu, T. Yu and J. Teng, FRP-confined circular concrete-filled thin steel tubes under axial compression, J. Composit. Construct. 15 (2011), no. 5, 850–860.
[15] A.M. Ibrahim and M.S. Mahmood, Finite element modeling of reinforced concrete beams strengthened with FRP laminates, Eur. J. Sci. Res. 30 (2009), no. 4, 526–541.
[16] A. Ilki, O. Peker, E. Karamuk, C. Demir and N. Kumbasar, FRP retrofit of low and medium strength circular and rectangular reinforced concrete columns, J. Mater. Civil Engin. 20 (2008), no. 2, 169–188.
[17] D. Kachlakev and T. Miller, Finite element modeling of reinforced concrete structures strengthened with FRP laminates, No. FHWA-OR-RD-01-XX. Oregon. Dept. of Transportation, Research Group, 2001.
[18] J. Li and M. Hadi, Behaviour of externally confined high-strength concrete columns under eccentric loading, Composite Struct. 62 (2003), no. 2, 145–153.
[19] R. Ma, Y. Xiao and K. Li, Full-scale testing of a parking structure column retrofitted with carbon fiber reinforced
composites, Construct. Build. Mater. 14 (2000), no. 2, 63–71.
composites, Construct. Build. Mater. 14 (2000), no. 2, 63–71.
[20] S. Mandal, A. Hoskin and A. Fam, Influence of concrete strength on confinement effectiveness of fiber-reinforced polymer circular jackets, ACI Struct. J. 102 (2005), no. 3, p. 383.
[21] A. Mirmiran, M. Shahawy, M. Samaan, H.E. Echary, J.C. Mastrapa and O. Pico, Effect of column parameters on FRP-confined concrete, J. Composit. Construct. 2 (1998), no. 4, 175–185.
[22] K. Miyauchi, Estimation of strengthening effects with Crbon Feber sheet for concrete column, Proc. 3rd Int. Symp. Non-metallic (FRP) Reinforc. Concrete Structures, Japan Concrete Institute, 1997, pp. 217–224.
[23] M. Motavalli, C. Czaderski and K. Pfyl-Lang, Prestressed CFRP for strengthening of reinforced concrete structures: Recent developments at Empa, Switzerland, J. Composit. Construct. 15 (2011), no. 2, 194–205.
[24] A. Nanni and M.S. Norris, FRP jacketed concrete under flexure and combined flexure-compression, Construct. Build. Mater. 9 (1995), no. 5, 273–281.
[25] A. Parvin and D. Brighton, FRP composites strengthening of concrete columns under various loading conditions, Polymers 6 (2014), no. 4, 1040–1056.
[26] S. Pessiki and A. Pieroni, Axial load behavior of largescale spirally reinforced high strength concrete columns, Structural J. 94 (1997), no. 3, 304–314.
[27] A.F. Pour, A. Gholampour, J. Zheng and T. Ozbakkaloglu, Behavior of FRP-confined high-strength concrete under eccentric compression: Tests on concrete-filled FRP tube columns, Composite Structures, 220 (2019), 261–272.
[28] M. Quiertant and J.-L. Clement, Behavior of RC columns strengthened with different CFRP systems under eccentric loading, Construct. Build. Mater. 25 (2011), no. 2, 452–460.
[29] H. Saadatmanesh, M.R. Ehsani and M.-W. Li, Strength and ductility of concrete columns externally reinforced with fiber composite straps, Structural J. 91 (1994), no. 4, 434–447.
[30] F. Seible and M.J.N. Priestley, Retrofit of rectangular flexural columns with composite fiber jackets, in Proc. 2nd. Annu. Seismic Res. Workshop, California Department of Transportation, Sacramento, California, 1993.
[31] E. Shaheen and N. Shrive, Sprayed glass fibre reinforced polymer masonry columns under concentric and eccentric loading, Canad. J. Civil Engin. 34 (2007), no. 11, 1495–1505.
[32] J. Stallings, J.W. Tedesco, M. El-Mihilmy and M. McCauley, Field performance of FRP bridge repairs, J. Bridge Eng. 5 (2000), no. 2, 107–113.
[33] D. Systemes, Abaqus 6.10 Analysis User’s Manual. Volume II: Analysis, Providence, RI, 2011.
[34] H. Toutanji, M. Han, J. Gilbert and S. Matthys, Behavior of large-scale rectangular columns confined with FRP composites, J. Composites Construction 14 (2010), no. 1, 62–71.
[35] B.L. Wahalathantri, D.P. Thambiratnam, T.H.T. Chan and S. Fawzia, A material model for flexural crack simulation in reinforced concrete elements using ABAQUS, Proc. First Int. Conf. Engin. Design. Dev. Built Envir. Sustain. Wellb., Queensland University of Technology, 2011, pp. 260–264.
[36] L.-M. Wang and Y.-F. Wu, Effect of corner radius on the performance of CFRP-confined square concrete columns: Test, Engin. Structures 30 (2008), no. 2, 493–505.
[37] Y.-F. Wu and C. Jiang, Effect of load eccentricity on the stress–strain relationship of FRP-confined concrete columns, Composite Structures 98 (2013), 228–241.
[38] H.-L. Wu, Y.F. Wang, L. Yu and X.R. Li, Experimental and computational studies on high-strength concrete circular columns confined by aramid fiber-reinforced polymer sheets, J. Composites Construct. 13 (2009), no. 2, 125–134.
[39] Y. Xiao and R. Ma, Seismic retrofit of RC circular columns using prefabricated composite jacketing, J. Structural Engin. 123 (1997), no. 10, 1357–1364.
[40] Y. Xiao and H. Wu, Compressive behavior of concrete confined by various types of FRP composite jackets, J. Reinforced Plastics Composites 22 (2003), no. 13, 1187–1201.
)
Volume 14, Issue 3
March 2023Pages 201-211
- Receive Date: 10 July 2022
- Revise Date: 14 August 2022
- Accept Date: 03 September 2022