Effect of utilizing glass fiber-reinforced polymer on flexural strengthening of RC arches

Document Type : Article

Authors

1 Department of Civil Engineering, School of Science and Engineering, Sharif University of Technology, International Campus, Kish Island, Iran

2 Department of Civil Engineering, Sharif University of Technology, Tehran, Iran

10.24200/sci.2019.21512

Abstract

An experimental study on the flexural behavior of reinforced concrete (RC) arches strengthened with glass fiber-reinforced polymer (GFRP) layers is performed. Totally, 36 specimens including 3 un-strengthened (control) and 33 strengthened RC arches were tested under centrally concentrated point load. The variables of this study were the steel reinforcement ratios, number of GFRP layers, and location and arrangement of GFRP layers. The failure mode, load-displacement response of specimens, crack propagation patterns, and GFRP debonding were examined. The extrados strengthening method was more effective than intrados strengthening approach in improving the failure load and rigidity of the arches. However, applying excessive GFRP layers at extrados can change the failure mode of arches from flexural to shear failure. The dominant failure mode of specimens was flexural and ductile failure due to the formation of five-hinge mechanism. Generally, GFRP strengthening could augment the ultimate load carrying capacity, secant stiffness, and energy absorption capacity of arch specimens by up to about 154, 300, and 93 percent, respectively. Statistical analyses were performed to assess the level of influence of each considered parameters on the behavior of RC arches. Finally, Analytical approach predicts the experimental data on arches with five-hinge failure mechanism satisfactorily.

Keywords


1. Garmendia, L., San-Jos_e, J.T., Garc__a, D., et al. Rehabilitation of masonry arches with compatible advanced composite material", Construction and Building Materials, 25(12), pp. 4374-4385 (2011). 2. Alves, M., Vaz, C., Gomes, A., et al. Restoration of the masonry arch bridge over Jamor river in the national palace of queluz", In Structural Analysis of Historical Constructions, R. Aguilar, Ed., RILEM Bookseries, Springer, Cham, 18, pp. 2483-2491 (2019). 3. Theriault, M. and Benmokrane, B. E_ects of FRP reinforcement ratio and concrete strength on exural behavior of concrete beams", Journal of Composites for Construction, 2(1), pp. 7-16 (1998). 4. Tahsiri, H., Sedehi, O., Khaloo, A., et al. Experimental study of RC jacketed and CFRP strengthened RC beams", Construction and Building Materials, 95, pp. 476-485 (2015). 5. Grace, N.F., Soliman, A.K., Abdel-Sayed, G., et al. Behavior and ductility of simple and continuous FRP reinforced beams", Journal of Composites for Construction, 2(4), pp. 186-194 (1998). 6. Hosseinpour, M., Celikag, M., and Akbarzadehbengar, H. Strengthening and shape modi_cation of _redamaged concrete with expansive cement concrete and CFRP wrap", Scientia Iranica, 26(2), pp. 699-708 (2019). 7. Mosto_nejad, M. and Noormohamadi, M. Analysis of RC beams strengthened with FRP sheets under shear and exure using MCFT", Scientia Iranica, 26(2), pp. 634-640 (2019). 8. Hosseini, A., Khaloo, A.R., and Fadaee, S. Seismic performance of high-strength concrete square columns con_ned with carbon _ber reinforced polymers (CFRPs)", Canadian Journal of Civil Engineering, 32(3), pp. 569-578 (2005). 9. Khalou, A.R. and Esmaeeli, A. Strengthening design limitations of an RC frames using FRP column wrapping considering column-to-beam strength ratio.", Scientia Iranica, 14(5), pp. 405-413 (2007). 10. Carozzi, F.G., Colombi, P., Fava, G., et al. Mechanical and bond properties of FRP anchor spikes in concrete and masonry blocks", Composite Structures, 183, pp. 185-198 (2018). 11. Shadan, F., Khaloo, A., and Shadan, P. Numerical study on exural strengthening of squat RC shear wall using FRP laminates", Scientia Iranica, 22(1), pp. 144-156 (2015). 12. Tao, Y., Stratford, T.J., and Chen, J.F. Behaviour of a masonry arch bridge repaired using _bre-reinforced polymer composites", Engineering Structures, 33(5), pp. 1594-1606 (2011). 13. Cancelliere, I., Imbimbo, M., and Sacco, E. Experimental tests and numerical modeling of reinforced masonry arches", Engineering Structures, 32(3), pp. 776-792 (2010). 14. Bati, S.B. and Rovero, L. Towards a methodology for estimating strength and collapse mechanism in masonry arches strengthened with _bre reinforced polymer applied on external surfaces", Materials and Structures, 41(7), pp. 1291-1306 (2008). 15. Oliveira, D.V., Basilio, I., and Louren_co, P.B. Experimental behavior of FRP strengthened masonry arches", Journal of Composites for Construction, 14(3), pp. 312-322 (2010). 16. Valluzzi, M.R. and Modena, C. Experimental analysis and modelling of masonry vaults strengthened by FRP", In Historical Constructions, Proc., 3rd Int. Seminar, Guimar_aes, Portugal: University of Minho, pp. 627-636 (2001). 17. Foraboschi, P. Strengthening of masonry arches with _ber-reinforced polymer strips", Journal of Composites for Construction, 8(3), pp. 191-202 (2004). 18. De Lorenzis, L., Dimitri, R., and La Tegola, A. Reduction of the lateral thrust of masonry arches and vaults with FRP composites", Construction and Building Materials, 21(7), pp. 1415-1430 (2007). 19. Caporale, A., Feo, L., Hui, D., et al. Debonding of FRP in multi-span masonry arch structures via limit analysis", Composite Structures, 108, pp. 856- 865 (2014). 20. Elmalich, D. and Rabinovitch, O. Stress analysis of monolithic circular arches strengthened with composite materials", Journal of Composites for Construction, 13(5), pp. 431-441 (2009). 21. Hamed, E., Chang, Z.T., and Rabinovitch, O. Strengthening of reinforced concrete arches with externally bonded composite materials: Testing and analysis", Journal of Composites for Construction, 19(1), p. 04014031 (2014). 22. Zhang, X., Wang, P., Jiang, M., et al. CFRP strengthening reinforced concrete arches: Strengthening methods and experimental studies", Composite Structures, 131, pp. 852-867 (2015). 23. ASTM A370-17, Standard Test Methods and Definitions for Mechanical Testing of Steel Products, American Society for Testing and Materials (ASTM) international, West Conshohocken, PA (2017). 24. ACI440 3R-04, Guide Test Methods for Fiber- Reinforced Polymers (FRPs) for Reinforcing or Strengthening Concrete Structures, Farmington Hills (USA), American Concrete Institute (2004). 25. Malek, A.M., Saadatmanesh, H., and Ehsani, M.R. Prediction of failure load of R/C beams strengthened with FRP plate due to stress concentration at the plate end", ACI Structural Journal, 95, pp. 142-152 (1998). H. Moradi et al./Scientia Iranica, Transactions A: Civil Engineering 26 (2019) 2299{2309 2309 26. Montgomery, D.C. and Runger, G.C., Applied Statistics and Probability for Engineers, 7th Edn., John Wiley & Sons (2018).