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

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Języki publikacji
EN
Abstrakty
EN
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.
Rocznik
Strony
17--30
Opis fizyczny
Bibliogr. 32 poz., fig., tab.
Twórcy
  • Politechnika Warszawska, Wydział Budownictwa, Aleja Armii Ludowej 16, 00-637 Warszawa; Polska
  • Politechnika Warszawska, Wydział Budownictwa, Aleja Armii Ludowej 16, 00-637 Warszawa; Polska
  • Politechnika Warszawska, Wydział Budownictwa, Aleja Armii Ludowej 16, 00-637 Warszawa; Polska
  • Politechnika Warszawska, Wydział Budownictwa, Aleja Armii Ludowej 16, 00-637 Warszawa; Polska
Bibliografia
  • 1. 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
  • 2. 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)
  • 3. 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.
  • 4. 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.
  • 5. 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
  • 6. 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
  • 7. 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
  • 8. ACI. Guide for the design and construction of concrete reinforced with FRP Bars. ACI 440.1R-15. Farmington Hills, MI: American Concrete Institute, 2015.
  • 9. CSA. Design and construction of building structures with fibre-reinforced polymers. CAN/CSA S806-12, Canadian Standards Association, 2012, Reaffirmed in 2017, 206 pages.
  • 10. 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
  • 11. Nanni A., De Luca A., Jawaheri Zadeh H., Reinforced concrete with FRP bars: Mechanics and design. CRC Press, Boca Raton, FL, 2014.
  • 12. Abbasi A., Hogg P. J., "Fire testing of concrete beams with fibre reinforced plastic rebar", Composites Part A, vol. 37, 2006, pp.1142-1150.
  • 13. 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
  • 14. 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
  • 15. 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.
  • 16. 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.
  • 17. 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.
  • 18. 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
  • 19. Barbero E.J., Introduction to composite materials design. 2nd ed., Taylor & Francis Group: Boca Raton, USA, 2011.
  • 20. 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.
  • 21. Voigt W., "Uber die beziehung zwischen den beiden elasticitatsconstanten isotroperkorper", Annals of Physics, vol. 274, no. 12, 1889, pp. 573-587.
  • 22. Ashton J. E., Halpin J. C., Petit P. H., Primer on composite materials: analysis. Technomic, Stamford Conn., 1969.
  • 23. 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
  • 24. ANSYS® Academic Research Mechanical, Release 16.2, Help System, Coupled Field Analysis Guide, ANSYS, Inc.
  • 25. Jesionowski T., Pilawka R., "Epoxy composites with silica crosslinked with 1-ethylimidazole" Polymers, vol. 11, no. 1, 2011, pp. 14-17.
  • 26. 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.
  • 27. Jesionowski T., Pilawka R., "Kompozycje epoksydowe z krzemionką”, Kompozyty, vol. 9, no. 2, 2009, pp. 112-116.
  • 28. 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
  • 29. 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
  • 30. 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
  • 31. 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
  • 32. ISO 834-1 (1999), Fire Resistance Tests – Elements of Buildings Construction, Part-1 General Requirements, International Organization for Standardization, Switzerland.
Uwagi
Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-754691be-1143-4393-993d-5869ce24bcb9
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