Title:
Bond Behavior of Glass Fiber-Reinforced Polymer Bars Under Long Term Thermal Conditioning
Author(s):
Jahanzaib, Shamim A. Sheikh, and Husham Almansour
Publication:
Structural Journal
Volume:
119
Issue:
5
Appears on pages(s):
153-166
Keywords:
DOI:
10.14359/51734800
Date:
9/1/2022
Abstract:
The bond strength of glass fiber-reinforced polymer (GFRP) reinforcing bars after long-term thermal conditioning was experimentally investigated in this study. The results of 23 pullout and 14 beam specimens constructed with 16 mm sand-coated GFRP bars are presented. To study the long-term durability of the bond of GFRP bars with concrete, specimens were conditioned at 50 and 80°C for 4 months under a relative humidity of 60%. The pullout specimens were tested under direct tensile load and the beam specimens were tested under four-point loading. Variables in the study included concrete compressive strength, embedment length, test type, and temperature. Based on the experimental results, it was concluded that the studied thermal conditioning induced up to 26% reductions in the bond strength of GFRP bars. Moreover, the beam specimens yielded lower bond stresses at room temperature and experienced more thermal degradation than their counterpart pullout specimens. The 50°C thermal treatment was designed to study the climate challenges of continuously increasing temperatures, and the 80°C thermal exposure was devised to replicate the elevated service temperatures that may result from extreme events such as fires.
Related References:
ACI Committee 440, 2015, “Guide for the Design and Construction of Structural Concrete Reinforced with Fiber-Reinforced Polymer (FRP) Bars (ACI 440.1R-15),” American Concrete Institute, Farmington Hills, MI, 88 pp.
ASTM D2584-18, 2018, “Standard Test Method for Ignition Loss of Cured Reinforced Resins,” ASTM International, West Conshohocken, PA, 3 pp.
ASTM D7205/D7205M-06, 2006, “Standard Test Method for Tensile Properties of Fiber Reinforced Polymer Matrix Composite Bars,” ASTM International, West Conshohocken, PA, 12 pp.
ASTM D7913/D7913M-14, 2014, “Standard Test Method for Bond Strength of Fiber-Reinforced Polymer Matrix Composite Bars to Concrete by Pullout Testing,” ASTM International, West Conshohocken, PA, 9 pp.
Bush, E., and Lemmen, D. S., eds., 2019, “Canada’s Changing Climate Report,” Government of Canada, Ottawa, ON, Canada, 444 pp.
Cosenza, E.; Manfredi, G.; and Realfonzo, R., 1997, “Behavior and Modeling of Bond of FRP Rebars to Concrete,” Journal of Composites for Construction, ASCE, V. 1, No. 2, May, pp. 40-51. doi: 10.1061/(ASCE)1090-0268(1997)1:2(40)
CSA S6, 2019, “Canadian Highway Bridge Design Code,” Canadian Standards Association, Toronto, ON, Canada.
CSA S806-12 (R2017), 2012, “Design and Construction of Building Structures with Fibre-Reinforced Polymers,” CSA Group, Toronto, ON, Canada, 206 pp.
CSA S807-10 (R2015), 2010, “Specification for Fibre-Reinforced Polymers,” CSA Group, Toronto, ON, Canada, 44 pp.
CSA S807:19, 2019, “Specification for Fibre-Reinforced Polymers,” CSA Group, Toronto, ON, Canada, 67 pp.
Ehsani, M. R.; Saadatmanesh, H.; and Tao, S., 1993, “Bond of GFRP Rebars to Ordinary-Strength Concrete,” Fiber-Reinforced-Plastic Reinforcement for Concrete Structures – International Symposium, SP-138, A. Nanni and C. W. Dolan, eds., American Concrete Institute, Farmington Hills, MI, pp. 333-345
Ehsani, M. R.; Saadatmanesh, H.; and Tao, S., 1997, “Bond Behavior of Deformed GFRP Rebars,” Journal of Composite Materials, V. 31, No. 14, July, pp. 1413-1430. doi: 10.1177/002199839703101404
Galati, N.; Nanni, A.; Dharani, L. R.; Focacci, F.; and Aiello, M. A., 2006, “Thermal Effects on Bond between FRP Rebars and Concrete,” Composites Part A: Applied Science and Manufacturing, V. 37, No. 8, Aug., pp. 1223-1230. doi: 10.1016/j.compositesa.2005.05.043
Hajiloo, H., and Green, M. F., 2018, “Bond Strength of GFRP Reinforcing Bars at High Temperatures with Implications for Performance in Fire,” Journal of Composites for Construction, ASCE, V. 22, No. 6, Dec., p. 04018055.
Jabbar, S. A., and Farid, S. B. H., 2018, “Replacement of Steel Rebars by GFRP Rebars in the Concrete Structures,” Karbala International Journal of Modern Science, V. 4, No. 2, June, pp. 216-227.
Masmoudi, A.; Masmoudi, R.; and Ouezdou, M. B., 2008, “Evaluation of Temperature Effect on the Bond Properties between GFRP Bars Reinforcement and Concrete,” Second Euro Mediterranean Symposium on Advances in Geomaterials and Structures, AGS’08, Hammamet, Tunisia, pp. 437-444.
Masmoudi, R.; Masmoudi, A.; Ouezdou, M. B.; and Daoud, A., 2011, “Long-Term Bond Performance of GFRP Bars in Concrete under Temperature Ranging from 20°C to 80°C,” Construction and Building Materials, V. 25, No. 2, Feb., pp. 486-493. doi: 10.1016/j.conbuildmat.2009.12.040
McIntyre, E.; Bisby, L.; and Stratford, T., 2014, “Bond Strength of FRP Reinforcement in Concrete at Elevated Temperature,” The 7th International Conference on Fiber Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2014), Vancouver, BC, Canada, 6 pp.
Mosley, C. P.; Tureyen, A. K.; and Frosch, R. J., 2008, “Bond Strength of Nonmetallic Reinforcing Bars,” ACI Structural Journal, V. 105, No. 5, Sept.-Oct., pp. 634-642.
Ozel, M.; Bank, L. C.; Arora, D.; Gonenc, O.; Gremel, D.; Nelson, B.; and McMonigal, D., 2003, “Comparison between FRP Rebars, FRP Grid and Steel Rebar Reinforced Concrete Beams,” Fibre-Reinforced Polymer Reinforcement for Concrete Structures – Volume 2, K. H. Tan, ed., World Scientific Publishing, Singapore, pp. 1067-1076.
Park, Y., 2012, “Long-term Performance of GFRP Reinforced Concrete Beams and Bars Subjected to Aggressive Environments,” PhD thesis, The University of Texas at Arlington, Arlington, TX, 238 pp.
Pecce, M.; Manfredi, G.; Realfonzo, R.; and Cosenza, E., 2001, “Experimental and Analytical Evaluation of Bond Properties of GFRP Bars,” Journal of Materials in Civil Engineering, ASCE, V. 13, No. 4, Aug., pp. 282-290. doi: 10.1061/(ASCE)0899-1561(2001)13:4(282)
RILEM TC 9-RC. 1994, “RC 5 Bond Test for Reinforcement Steel. 1. Beam Test, 1982,” RILEM Recommendations for the Testing and Use of Constructions Materials, E & FN Spon, London, UK, pp. 213-217.
SENES Consultants Ltd., 2012, “Toronto’s Future Weather & Climate Driver Study: Outcomes Report,” Toronto Environment Office, Toronto, ON, Canada, 15 pp.
Sheikh, S. A., and Kharal, Z., 2018, “Replacement of Steel with GFRP for Sustainable Reinforced Concrete,” Construction and Building Materials, V. 160, Jan., pp. 767-774. doi: 10.1016/j.conbuildmat.2017.12.141
Tastani, S. P., and Pantazopoulou, S. J., 2013, “Reinforcement and Concrete Bond: State Determination along the Development Length,” Journal of Structural Engineering, ASCE, V. 139, No. 9, Sept., pp. 1567-1581. doi: 10.1061/(ASCE)ST.1943-541X.0000725
Tighiouart, B.; Benmokrane, B.; and Gao, D., 1998, “Investigation of Bond in Concrete Member with Fibre Reinforced Polymer (FRP) Bars,” Construction and Building Materials, V. 12, No. 8, Dec., pp. 453-462. doi: 10.1016/S0950-0618(98)00027-0
Wang, L.; Zhang, J.; Huang, C.; and Fu, F., 2020, “Comparative Study of Steel-FRP, FRP and Steel-Reinforced Coral Concrete Beams in Their Flexural Performance,” Materials (Basel), V. 13, No. 9, May, Article No. 2097. doi: 10.3390/ma13092097
Wang, Y. C.; Wong, P. M. H.; and Kodur, V., 2007, “An Experimental Study of the Mechanical Properties of Fibre Reinforced Polymer (FRP) and Steel Reinforcing Bars at Elevated Temperatures,” Composite Structures, V. 80, No. 1, Sept., pp. 131-140. doi: 10.1016/j.compstruct.2006.04.069
Weber, A., 2008, “Fire-Resistance Tests on Composites Rebars,” Fourth International Conference on FRP Composites in Civil Engineering (CICE 2008), Zurich, Switzerland, 6 pp.
Zhychkovska, O., 2019, “Effect of Alkali-Silica Reaction (ASR) on Steel-Concrete Bond,” MASc thesis, Department of Civil and Mineral Engineering, University of Toronto, Toronto, ON, Canada, 289 pp.