Mechanical performance of FRP-RC flexural members subjected to fire conditions

Kostiantyn Protchenko

k.protchenko@il.pw.edu.pl
Faculty of Civil Engineering; Warsaw University of Technology; 16 Armii Ludowej av., 00-637 Warsaw; (Poland)
https://orcid.org/0000-0003-1357-2174

Elżbieta Szmigiera


Faculty of Civil Engineering; Warsaw University of Technology; 16 Armii Ludowej av., 00-637 Warsaw; (Poland)
https://orcid.org/0000-0001-9084-2372

Marek Urbański


Faculty of Civil Engineering; Warsaw University of Technology; 16 Armii Ludowej av., 00-637 Warsaw; (Poland)
https://orcid.org/0000-0002-3568-6888

Andrzej Garbacz


Faculty of Civil Engineering; Warsaw University of Technology; 16 Armii Ludowej av., 00-637 Warsaw; (Poland)
https://orcid.org/0000-0002-5229-7884

Abstract

One of the main concerns that limit the widespread use of Fibre-Reinforced Polymers (FRP) bars as internal reinforcement for reinforced concrete (RC) structures is their relatively unexplored response to elevated temperatures. The behaviour of FRP reinforcement at elevated temperature as well as their post-fire behaviour can be different from conventional reinforcement and depends on the properties of the constituents of the bars. Therefore, the fire resistance of FRP-RC structures is an important issue that needs careful investigation before FRP reinforcement can be implemented in RC structures.

The experimental results for full-scale FRP-RC beams subjected to specific fire action were presented and discussed in this paper. The specimens were exposed to heat in the mid-section from below (tension zone) and from the sides. As one of the main aims was to examine the influence of different reinforcement configurations, the testing was made for concrete beams reinforced with three different types of FRP bars: (i) basalt-FRP (BFRP), (ii) hybrid FRP with carbon and basalt fibres (HFRP) and (iii) nano-hybrid FRP (nHFRP), with modification of the epoxy matrix of the rebars.

The present work describes the behaviour of FRP-RC beams exposed to fire conditions and simultaneous loading (50 % of their ultimate strength capacity at normal temperature) and unloaded beams were tested after the cooling phase in order to evaluate their residual resistance.

Present work shows that the type of FRP bars used has a direct influence on the outcomes and the way of destruction. The maximum ductility, the longest heating time of approximately 100 minutes, was obtained for beams reinforced with BFRP bars and attained deflections were corresponded to the value of 162 mm.

Supporting Agencies

This work was supported by the National Centre for Research and Development. Project

Keywords:

Fibre-Reinforced Polymers (FRP) bars, Hybrid FRP bars, FRP-RC beams, Fire resistance of FRP, Fire resistance of FRP-RC members

Portnov G., Bakis C. E., Lackey E., Kulakov V., "FRP Reinforcing bars – designs and methods of manufacture (Review of Patents)", Mechanics of Composite Materials, vol. 49, no. 4, (2013), pp. 381-400. https://doi.org/10.1007/s11029-013-9355-1
DOI: https://doi.org/10.1007/s11029-013-9355-1   Google Scholar

Castro F., Protasio & Carino N., "Tensile and Nondestructive Testing of FRP Bars", Journal of Composites for Construction, vol. 2, no. 1, 1998, pp. 17-27. https://doi.org/10.1061/(ASCE)1090-0268(1998)2:1(17)
DOI: https://doi.org/10.1061/(ASCE)1090-0268(1998)2:1(17)   Google Scholar

Palmieri A., Matthys S., and Tierens M. "Basalt fibres: Mechanical properties and applications for concrete structures." in Concrete solutions : proceedings of the international conference on Concrete Solutions. Taylor and Francis Group, 2009, pp.165-169.
  Google Scholar

Garbacz A., Radomski W. A., Mossakowski P., "Alternatywne zbrojenie betonu kompozytami FRP – zagadnienie kompatybilności" [EN: Alternative reinforcement of concrete using FRP composites – compatibility issues], Mosty, no. 1, (2015), pp. 42-45.
  Google Scholar

Elsayed T. A., Elhefnawy A. A., Eldaly A. A., Ghanem, G. M., "Hybrid fiber reinforced polymers rebars", Journal of Advanced Materials, vol. 43, 2011, pp. 65-75. https://doi.org/10.1163/092430410X547074
DOI: https://doi.org/10.1163/092430410X547074   Google Scholar

Kowalski R., Głowacki M. J., Abramowicz M., "Premature destruction of two-span RC beams exposed to high temperature caused by a redistribution of shear forces", Journal of Civil Engineering and Manufacturing, vol. 22, no. 8, 2016, pp. 1-9. https://doi.org/10.3846/13923730.2016.1144645
DOI: https://doi.org/10.3846/13923730.2016.1144645   Google Scholar

Kowalski R., Głowacki M. J., "On the experimental analysis of temperature influence on stiffness of reinforced concrete beams", Journal of Structural Fire Engineering, vol. 6, no. 1, 2015, pp. 49-57. https://doi.org/10.1260/2040-2317.6.1.49
DOI: https://doi.org/10.1260/2040-2317.6.1.49   Google Scholar

ACI. Guide for the design and construction of concrete reinforced with FRP Bars. ACI 440.1R-15. Farmington Hills, MI: American Concrete Institute, 2015.
  Google Scholar

CSA. Design and construction of building structures with fibre-reinforced polymers. CAN/CSA S806-12, Canadian Standards Association, 2012, Reaffirmed in 2017, 206 pages.
  Google Scholar

Nigro E., Cefarelli G., Bilotta A., Manfredi G., Cosenza E., "Fire resistance of concrete slabs reinforced with FRP bars part II: experimental results and numerical simulations on the thermal field", Composites Part B: Engineering, vol. 42, no. 6, 2011, pp. 1751-1763. https://doi.org/10.1016/j.compositesb.2011.02.026
DOI: https://doi.org/10.1016/j.compositesb.2011.02.026   Google Scholar

Nanni A., De Luca A., Jawaheri Zadeh H., Reinforced concrete with FRP bars: Mechanics and design. CRC Press, Boca Raton, FL, 2014.
DOI: https://doi.org/10.1201/b16669   Google Scholar

Abbasi A., Hogg P. J., "Fire testing of concrete beams with fibre reinforced plastic rebar", Composites Part A, vol. 37, 2006, pp.1142-1150.
DOI: https://doi.org/10.1016/j.compositesa.2005.05.029   Google Scholar

Hajiloo H., Green M. F., Noël M., Bénichou N., Sultan M., "Fire tests on full-scale FRP reinforced concrete slabs", Composite Structures, vol. 179, 2017, pp. 705-719. https://doi.org/10.1016/j.compstruct.2017.07.060
DOI: https://doi.org/10.1016/j.compstruct.2017.07.060   Google Scholar

Nigro E., Cefarelli G., Bilotta A., Manfredi G., Cosenza E., "Fire resistance of concrete slabs reinforced with FRP bars part I: Experimental investigations on the mechanical behavior", Composites Part B Engineering, 42 (6), (2011), pp. 1739-1750. https://doi.org/10.1016/j.compositesb.2011.02.025
DOI: https://doi.org/10.1016/j.compositesb.2011.02.025   Google Scholar

Kodur V. K. R., Bisby L. A., Foo S., "Thermal behaviour of fire-exposed concrete slabs reinforced with fibre reinforced polymer bars", ACI Structural Journal, vol. 102, no. 6, 2005, pp. 799-807.
DOI: https://doi.org/10.14359/14787   Google Scholar

Nigro E., Cefarelli G., Bilotta A., Manfredi G., Cosenza E., "Tests at high temperatures on concrete slabs reinforced with bent FRP bars", in Proc., 10th International symp on fiber reinforced polymer reinforcement for reinforced concrete structures, ACI SP-275, Farmington Hills Michigan, USA, 2011.
  Google Scholar

Sadek A., El-Hawary M., El-Deeb A., "Fire Resistance Testing of Concrete Beams Reinforced by GFRP Rebars", European Journal of Scientific Resources, vol. 15, no. 2, 2006, pp. 190-200.
DOI: https://doi.org/10.2190/AF.15.2.d   Google Scholar

Protchenko K., Szmigiera E. D., Urbański M., Garbacz A., Narloch P. L., & Lesniak P., "State-of-the-Art on Fire Resistance Aspects of FRP Reinforcing Bars", IOP Conference Series: Materials Science and Engineering, vol. 661, 2019, pp. 1-8. http://doi.org/10.1088/1757-899X/661/1/012081
DOI: https://doi.org/10.1088/1757-899X/661/1/012081   Google Scholar

Barbero E.J., Introduction to composite materials design. 2nd ed., Taylor & Francis Group: Boca Raton, USA, 2011.
  Google Scholar

Black T., Kosher R., "Non Metallic Materials: Plastic, Elastomers, Ceramics and Composites", in Materials and Processing in Manufacturing. 10th ed., John Wiley & Sons, USA, (2008), pp. 162-194.
  Google Scholar

Voigt W., "Uber die beziehung zwischen den beiden elasticitatsconstanten isotroperkorper", Annals of Physics, vol. 274, no. 12, 1889, pp. 573-587.
DOI: https://doi.org/10.1002/andp.18892741206   Google Scholar

Ashton J. E., Halpin J. C., Petit P. H., Primer on composite materials: analysis. Technomic, Stamford Conn., 1969.
  Google Scholar

Halpin J. C. "Stiffness and expansion estimates for oriented short fiber composites", Journal of Composite Materials, vol. 3, 1969, pp. 732-734. https://doi.org/10.1177/002199836900300419
DOI: https://doi.org/10.1177/002199836900300419   Google Scholar

ANSYS® Academic Research Mechanical, Release 16.2, Help System, Coupled Field Analysis Guide, ANSYS, Inc.
  Google Scholar

Jesionowski T., Pilawka R., "Epoxy composites with silica crosslinked with 1-ethylimidazole" Polymers, vol. 11, no. 1, 2011, pp. 14-17.
  Google Scholar

Baur J. W., Chen C., Justice R. S., Schaefer D. W., "Highly dispersed nanosilica-epoxy resins with enhanced mechanical properties", Polymers, vol. 49, 2008, pp. 3805-3815.
DOI: https://doi.org/10.1016/j.polymer.2008.06.023   Google Scholar

Jesionowski T., Pilawka R., "Kompozycje epoksydowe z krzemionką”, Kompozyty, vol. 9, no. 2, 2009, pp. 112-116.
  Google Scholar

Szmigiera E., Protchenko K., Urbański M., Garbacz A., "Mechanical Properties of Hybrid FRP Bars and Nano-Hybrid FRP Bars", Archives of Civil Engineering, vol. 65, no. 1, 2019, pp. 97-110. https://doi.org/10.2478/ace-2019-0007
DOI: https://doi.org/10.2478/ace-2019-0007   Google Scholar

Garbacz A., Szmigiera E. D., Protchenko K., Urbański M. "On Mechanical Characteristics of HFRP Bars with Various Types of Hybridization", in Intern. Congr. on Polym. in Con. (ICPIC 2018): Polym. for Res. and Sust. Con. Infr., 2018, pp. 653-658. http://dx.doi.org/10.1007/978-3-319-78175-4
DOI: https://doi.org/10.1007/978-3-319-78175-4   Google Scholar

Protchenko K., Dobosz J., Urbański M., Garbacz A., "Wpływ substytucji włókien bazaltowych przez włókna węglowe na właściwości mechaniczne prętów B/CFRP (HFRP)" [Influence of the substitution of basalt fibres by carbon fibres on the mechanical behavior of B/CFRP (HFRP) bars], Czasopismo Inżynierii Lądowej, Środowiska i Architektury, JCEEA, 63, 1/1, 2016, pp. 149-156. http://doi.prz.edu.pl/pl/pdf/biis/454
DOI: https://doi.org/10.7862/rb.2016.17   Google Scholar

Protchenko K., Szmigiera E.D., Urbański M., Garbacz A. "Development of Innovative HFRP Bars", MATEC Web of Conferences, vol. 196, 2018, pp. 1-6. http://doi.org/10.1051/matecconf/201819604087
DOI: https://doi.org/10.1051/matecconf/201819604087   Google Scholar

ISO 834-1 (1999), Fire Resistance Tests – Elements of Buildings Construction, Part-1 General Requirements, International Organization for Standardization, Switzerland.
  Google Scholar


Published
2020-11-02

Cited by

Protchenko, K. (2020) “Mechanical performance of FRP-RC flexural members subjected to fire conditions”, Budownictwo i Architektura, 19(4), pp. 019–031. doi: 10.35784/bud-arch.2119.

Authors

Kostiantyn Protchenko 
k.protchenko@il.pw.edu.pl
Faculty of Civil Engineering; Warsaw University of Technology; 16 Armii Ludowej av., 00-637 Warsaw; Poland
https://orcid.org/0000-0003-1357-2174

Authors

Elżbieta Szmigiera 

Faculty of Civil Engineering; Warsaw University of Technology; 16 Armii Ludowej av., 00-637 Warsaw; Poland
https://orcid.org/0000-0001-9084-2372

Authors

Marek Urbański 

Faculty of Civil Engineering; Warsaw University of Technology; 16 Armii Ludowej av., 00-637 Warsaw; Poland
https://orcid.org/0000-0002-3568-6888

Authors

Andrzej Garbacz 

Faculty of Civil Engineering; Warsaw University of Technology; 16 Armii Ludowej av., 00-637 Warsaw; Poland
https://orcid.org/0000-0002-5229-7884

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