Effects of concrete cover thickness and concrete strength on temperature transfer in high temperature exposed FRP reinforced concrete
DOI:
https://doi.org/10.7764/RDLC.22.1.242Keywords:
Concrete cover, FRP bar, heat; concrete strength, fire effect.Abstract
While Fibre-Reinforced Plastics are lightweight, show a high tensile strength, and have no issue with corrosion, they are unfortunately brittle and perform poorly against temperature. Therefore, it is important to know the time and magnitude of the temperature reaching the bars in the high-temperature effect of FRPs produced in the form of bar in reinforced concrete structural elements in concrete. This study set out to examine the time and temperature values of glass fiber reinforced polymer (GFRP) reinforced concrete under high-temperatures. The effects of concrete cover thickness and concrete strength on temperature transfer were researched experimentally. GFRP bars were placed in specimens prepared in three concrete strengths and three different concrete cover thicknesses (20-40-60 mm) exposed to temperature, and temperature-time graphs were created by measuring bar temperature, concrete surface temperature and ambient temperature. The critical time to a glass transition temperature, and optimum cover thickness of GFRPs according to concrete strength and concrete cover thickness were discussed. The study results appeared to indicate that the thickness of the concrete cover is very effective in protecting the bar against temperature in reinforced concrete structural elements, as concrete strength, itself, has only a limited effect.
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References
Abbasi, A., & Hogg, P. J. (2005). A model for predicting the properties of the constituents of a glass fibre rebar reinforced concrete beam at elevated temperatures simulating a fire test. Composites Part B: Engineering, 36(5), 384–393. https://doi.org/10.1016/J.COMPOSITESB.2005.01.005
Abdulrahman, A. S., & Kadir, M. R. A. (2022). Behavior and flexural strength of fire damaged high strength reinforced rectangular concrete beams after strengthening with CFRP laminates. Ain Shams Engineering Journal, 13(6), 101767. https://doi.org/10.1016/J.ASEJ.2022.101767
ACI. (2015). “(American Concrete Institute). Guide for the design and construction of concrete reinforced with FRP bars. ACI 440.1R-15. Farmington Hills, MI.”
Ahmad, M., Hu J.L., Ahmad, F., Tang,X. W., Amjad,A., Iqbal, M. J., Asim, M., and Farooq. A. (2021). Supervised Learning Methods for Modeling Con-crete Compressive Strength Prediction at High Temperature. Materials 14(8):1–19. doi: 10.3390/ma14081983.
Ashrafi, H., Bazli, M., Najafabadi, E. P., & Vatani Oskouei, A. (2017). The effect of mechanical and thermal properties of FRP bars on their tensile per-formance under elevated temperatures. Construction and Building Materials, 157, 1001–1010. https://doi.org/10.1016/J.CONBUILDMAT.2017.09.160
Aydin, F. (2018). Experimental investigation of thermal expansion and concrete strength effects on FRP bars behavior embedded in concrete. Construc-tion and Building Materials, 163, 1–8. https://doi.org/10.1016/J.CONBUILDMAT.2017.12.101
Aydın, F., & Arslan, Ş. (2021). Investigation of the durability performance of FRP bars in different environmental conditions. Advances in Concrete Construction, 12(4), 295–302. https://doi.org/10.12989/acc.2021.12.4.295
Aykut, B., & CIRPICI, B. K. (2018). FIRE DESIGN OF UNIVERSAL STEEL BEAMS – DEVELOPING EXCEL SPREADSHEETS (ÜNİVERSAL ÇELİK KİRİŞLERİN YANGINA KARŞI DİZAYNI – EXCEL GELİŞTİRMESİ). International Engineering and Natural Sciences Conference (IENSC 2018).
Bisby, L. A., Green, M. F., & Kodur, V. K. R. (2005). Response to fire of concrete structures that incorporate FRP. https://doi.org/10.1002/pse.198
Bisby, L. A. (2003). Fire Behaviour of Fibre-Reinforced Polymer (FRP) Reinforced or Confined Concrete. Doctora Thesis, Queen’s University Kingston Ontario, Canada
Bisby, L. A., & Kodur, V. K. R. (2007). Evaluating the fire endurance of concrete slabs reinforced with FRP bars: Considerations for a holistic approach. Composites Part B: Engineering, 38(5–6), 547–558. https://doi.org/10.1016/J.COMPOSITESB.2006.07.013
Biswas, Bhabatosh, Nil Ratan Bandyopadhyay, and Arijit Sinha. (2019). Mechanical and Dynamic Mechanical Properties of Unsaturated Polyester Resin-Based Composites. Unsaturated Polyester Resins: Fundamentals, Design, Fabrication, and Applications 407–34. doi: 10.1016/B978-0-12-816129-6.00016-8.
Chellapandian, M., Mani, A., & Suriya Prakash, S. (2020). Effect of macro-synthetic structural fibers on the flexural behavior of concrete beams rein-forced with different ratios of GFRP bars. Composite Structures, 254, 112790. https://doi.org/10.1016/J.COMPSTRUCT.2020.112790
CNR. (2006). Guide for the Design and Construction of Concrete Structures Reinforced with Fiber-Reinforced Polymer Bars. In Italian National Research Council.
CSA. (2002). Design and construction of building components with fibre-reinforced polymers. S806-02, Canadial Standards Association.
Del Prete, I., Bilotta, A., Bisby, L., & Nigro, E. (2021). Elevated temperature response of RC beams strengthened with NSM FRP bars bonded with cementi-tious grout. Composite Structures, 258, 113182. https://doi.org/10.1016/J.COMPSTRUCT.2020.113182
Ellis, D. S., Tabatabai, H., & Nabizadeh, A. (2018). Residual Tensile Strength and Bond Properties of GFRP Bars after Exposure to Elevated Tempera-tures. Materials 2018, Vol. 11, Page 346, 11(3), 346. https://doi.org/10.3390/MA11030346
Galati, N., Vollintine, B., Nanni, A., Dharani, L. R., & Aiello, M. A. (2004). THERMAL EFFECTS ON BOND BETWEEN FRP REBARS AND CONCRETE. Advanced Polymer Composites for Structural Applications in Construction, 501–508. https://doi.org/10.1533/9781845690649.5.501
Gao, W., Dai, J., & Teng, J. (2016). Simple Method for Predicting Temperatures in Reinforced Concrete Beams Exposed to a Standard Fire: Http://Dx.Doi.Org/10.1260/1369-4332.17.4.573, 17(4), 573–590. https://doi.org/10.1260/1369-4332.17.4.573
Gewain, R. G., Iwankiw, N. R., & Alfawakhiri, F. (2003). Facts for steel buildings: fire. Chicago :American Institute of Steel Construction, 51.
Gooranorimi, O., Claure, G., De Caso, F., Suaris, W., & Nanni, A. (2018). Post-Fire Behavior of GFRP Bars and GFRP-RC Slabs. Journal of Materials in Civil Engineering, 30(3), 04017296. https://doi.org/10.1061/(asce)mt.1943-5533.0002168
Hajiloo, H., Green, M.F., and Gales. J. (2018). Mechanical Properties of GFRP Reinforcing Bars at High Temperatures. Construction and Building Materi-als 162:142–54. doi: 10.1016/J.CONBUILDMAT.2017.12.025.
Klingsch, E. W. (2014). Explosive spalling of concrete in fire. IBK Bericht, 356. https://doi.org/10.3929/ETHZ-A-010243000
Kodur, V. K. R., & Phan, L. (2007). Critical factors governing the fire performance of high strength concrete systems. Fire Safety Journal, 42(6–7), 482–488. https://doi.org/10.1016/J.FIRESAF.2006.10.006
Kumahara, S., Y. Masuda, H. Tanano, and A. Shimizu. (1993). Tensile Strength of Continuous Fiber Bar Under High Temperature. Special Publication 138:731–42. doi: 10.14359/3954.
Li, Y., Tan, K. H., & Yang, E. H. (2019). Synergistic effects of hybrid polypropylene and steel fibers on explosive spalling prevention of ultra-high perfor-mance concrete at elevated temperature. Cement and Concrete Composites, 96, 174–181. https://doi.org/10.1016/J.CEMCONCOMP.2018.11.009
Lie, T. T., Chabot, M.and Irwin. R. J. (1992). Fire Resistance of Circular Hollow Steel Sections Filled with Bar-Reinforced Concrete. Ottawa, ON.
Ma, Q., Guo, R., Zhao, Z., Lin, Z., & He, K. (2015). Mechanical properties of concrete at high temperature—A review. Construction and Building Materi-als, 93, 371–383. https://doi.org/10.1016/J.CONBUILDMAT.2015.05.131
Mouritz, A. P., & Arthur, G. G. (2007). Fire properties of polymer composite materials. Springer Science & Business Media.
Nadjai, A., Talamona, D, .and Ali. F. (2005). Fire Performance of Concrete Beams Reinforced with FRP Bars. Proceeding of the Int Sympsium on Bond Behaviour of FRP in Structures 401–10.
Najafabadi, E. P., Oskouei, A. V., Khaneghahi, M. H., Shoaei, P., & Ozbakkaloglu, T. (2019). The tensile performance of FRP bars embedded in concrete under elevated temperatures. Construction and Building Materials, 211, 1138–1152. https://doi.org/10.1016/J.CONBUILDMAT.2019.03.239
Nigro, E., Cefarelli, G., Bilotta, A., Manfredi, G., & Cosenza, E. (2011). Fire resistance of concrete slabs reinforced with FRP bars. Part I: Experimental investigations on the mechanical behavior. Composites Part B: Engineering, 42(6), 1739–1750. https://doi.org/10.1016/j.compositesb.2011.02.025
Nkurunziza, G., Debaiky, A., Cousin, P., & Benmokrane, B. (2005). Durability of GFRP bars: a critical review of the literature. Progress in Structural Engi-neering and Materials, 7(4), 194–209. https://doi.org/10.1002/PSE.205
Özkal, F. M., Polat, M., Yağan, M., & Öztürk, M. O. (2018). Mechanical properties and bond strength degradation of GFRP and steel rebars at elevated temperatures. Construction and Building Materials, 184, 45–57. https://doi.org/10.1016/J.CONBUILDMAT.2018.06.203
Rafi, M. M., & Nadjai, A. (2010). Behavior of hybrid (steel-CFRP) and CFRP bar-reinforced concrete beams in fire: Http://Dx.Doi.Org/10.1177/0021998310385022, 45(15), 1573–1584. https://doi.org/10.1177/0021998310385022
Rafi, M. M., & Nadjai, A. (2014). Analytical method of temperature prediction in reinforced concrete beams. Journal of Structural Fire Engineering, 5(4), 367–380. https://doi.org/10.1260/2040-2317.5.4.367/FULL/PDF
Rami Hamad, J. A., Megat Johari, M. A., & Haddad, R. H. (2017). Mechanical properties and bond characteristics of different fiber reinforced polymer rebars at elevated temperatures. Construction and Building Materials, 142, 521–535. https://doi.org/10.1016/J.CONBUILDMAT.2017.03.113
Reid, E., Bilotta, A., Bisby, L., & Nigro, E. (2014). Mechanıcal Propertıes of Fıbre Reınforced Polymer Reınforcement For Concrete at Hıgh Temperature. 8th International Conference on Structures in Fire, 2, 1227–1234.
Remennikov, Alex, Matthew W. Goldston, and M. Neaz Sheikh. (2016). Impact Resistance of Ultra-High Strength Concrete Beams with FRP Reinforcement. Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016 (December):1374–80.
Resmi Gazete, (2007). Binaların Yangından Korunması Hakkında Yönetmelik.Turkiye
Rosa, I. C., Firmo, J. P., Correia, J. R., & Barros, J. A. O. (2019). Bond behaviour of sand coated GFRP bars to concrete at elevated temperature – Defini-tion of bond vs. slip relations. Composites Part B: Engineering, 160, 329–340. https://doi.org/10.1016/J.COMPOSITESB.2018.10.020
Rosa, I. C., Firmo, J. P., Correia, J. R., & Mazzuca, P. (2021). Influence of elevated temperatures on the bond behaviour of ribbed GFRP bars in concrete. Cement and Concrete Composites, 122, 104119. https://doi.org/10.1016/J.CEMCONCOMP.2021.104119
Saafi, M. (2002). Effect of fire on FRP reinforced concrete members. Composite Structures, 58(1), 11–20. https://doi.org/10.1016/S0263-8223(02)00045-4
Shi, X., Tan, T.-H., Tan, ; Kang-Hai, & Guo, Z. (2004). Influence of Concrete Cover on Fire Resistance of Reinforced Concrete Flexural Members. Journal of Structural Engineering, 30(8), 1225–1232. https://doi.org/10.1061/ASCE0733-94452004130:81225
Spagnuolo, S., Meda, A., Rinaldi, Z., & Nanni, A. (2018). Residual behaviour of glass FRP bars subjected to high temperatures. Composite Structures, 203, 886–893. https://doi.org/10.1016/J.COMPSTRUCT.2018.07.077
Ünlüoǧlu, E., Topçu, I. B., & Yalaman, B. (2007). Concrete cover effect on reinforced concrete bars exposed to high temperatures. Construction and Building Materials, 21(6), 1155–1160. https://doi.org/10.1016/J.CONBUILDMAT.2006.11.019
Wang, H., Zha, ) Xiaoxiong, & Ye, J. (2009). Fire Resistance Performance of FRP Rebar Reinforced Concrete Columns. International Journal of Concrete Structures and Materials, 3(2), 111–117. https://doi.org/10.4334/IJCSM.2009.3.2.111
Wang, K., Young, B., & Smith, S. T. (2011). Mechanical properties of pultruded carbon fibre-reinforced polymer (CFRP) plates at elevated temperatures. Engineering Structures, 33(7), 2154–2161. https://doi.org/10.1016/J.ENGSTRUCT.2011.03.006
Wang, X., & Zha, X. (2011). Experimental Research on Mechanical Behavior of GFRP Bars under High Temperature. Applied Mechanics and Materials, 71–78, 3591–3594. https://doi.org/10.4028/WWW.SCIENTIFIC.NET/AMM.71-78.3591
Wang, Y. C., Wong, P. M. H., & Kodur, V. (2007). An experimental study of the mechanical properties of fibre reinforced polymer (FRP) and steel rein-forcing bars at elevated temperatures. Composite Structures, 80(1), 131–140. https://doi.org/10.1016/J.COMPSTRUCT.2006.04.069
Wu, J., Li, H., & Xian, G. (2011). Influence of Elevated Temperature on the Mechanical and Thermal Performance of BFRP Rebar. Advances in FRP Composites in Civil Engineering - Proceedings of the 5th International Conference on FRP Composites in Civil Engineering, CICE 2010, 69–72. https://doi.org/10.1007/978-3-642-17487-2_12.
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