Experimental Study of the Behavior of GFRP Reinforced Concrete Corbels

Hiep Vu DANG, Sy Duc NGUYEN, An Vinh LE, Duy Phan NGUYEN

Abstract


Lately, there has been a growing use of FRP rebars (fiber reinforced polymer rebars) in structural components. To understand the complex behavior of these structures under loading, experimental studies are necessary. This article presents an experimental analysis of four double-sided concrete corbels reinforced with glass fiber-reinforced polymer (GFRP) bars and no web reinforcement, focusing on the effects of longitudinal reinforcement ratios and shear span to effective depth ratios (a/d) on structural performance. Two a/d ratios (0.7 and 1.0) and two values of longitudinal GFRP reinforcement ratios (ρf = 0.56% and ρf = 0.87%) were tested to compare the shear behavior of the corbel specimens. The failure modes, stiffness, load-displacement curves, and diagonal strut mechanism are discussed. The results reveal that the splitting mode of failure and the diagonal strut mechanism become dominant once inclined cracks appear. While both the a/d ratio and GFRP reinforcement ratio influence the behavior of GFRP-reinforced concrete corbels, the a/d ratio has a more pronounced effect on shear resistance, whereas the GFRP reinforcement ratio has a lesser impact on shear strength. Additionally, the ACI 440.1R-15 guidelines for predicting the shear strength of GFRP-reinforced concrete corbels were found to provide overly conservative estimates.

Keywords


Reinforced Concrete (RC) Corbel; GFRP bars; Shear capacity; Failure mode

Full Text:

PDF

References


- R. Al-Sunna, K. Pilakoutas, I. Hajirasouliha, M. Guadagnini, Deflection behaviour of FRP reinforced concrete beams and slabs: An experimental investigation. Composites Part B: Engineering, 43(5) (2012) 2125-2134. doi:10.1016/j.compositesb.2012.03.007.

- H. Vu Dang, D. Nguyen Phan, Experimental investigation and analysis of pure bending plastic hinge zone in hybrid beams reinforced with high reinforcement ratio under static loads. European Journal of Environmental and Civil Engineering, 26(13) (2022) 6188-6210. doi:10.1080/19648189.2021.1934553.

- C. Barris, L. Torres, I. Vilanova, C. Miàs, M. Llorens, Experimental study on crack width and crack spacing for Glass-FRP reinforced concrete beams. Engineering Structures, 131 (2017) 231-242. doi:10.1016/j.engstruct.2016.11.007.

- P. Duy Nguyen, V. Hiep Dang, N. Anh Vu, P.A. Eduardovich, Long-term Deflections of Hybrid GFRP/Steel Reinforced Concrete Beams under Sustained Loads. Civil Engineering Journal, 6 (2020) 1-11. doi:10.28991/cej-2020-SP(EMCE)-01.

- O.M. Mostafa, M.K. Rahman, M.M. Al-Zahrani, S.K. Adekunle, M.A. Al-Osta, S.K. Najamuddin, Flexural behavior and bond coefficient of BFRP bar reinforced normal and high strength concrete beams. Construction and Building Materials, 401 (2023) 132896. doi:10.1016/j.conbuildmat.2023.132896.

- F. Mukhtar, A. Deifalla, A shear model for FRP reinforced concrete elements based on refined Critical Shear Crack Theory parameters. Journal of Building Engineering, 72 (2023) 106633. doi:10.1016/j.jobe.2023.106633.

- C. Homkhiew, T. Ratanawilai, W. Thongruang, The optimal formulation of recycled polypropylene/rubberwood flour composites from experiments with mixture design. Composites Part B: Engineering, 56 (2014) 350-357. doi:10.1016/j.compositesb.2013.08.041.

- C. Homkhiew, T. Ratanawilai, W. Thongruang, Optimizing the formulation of polypropylene and rubberwood flour composites for moisture resistance by mixture design. Journal of Reinforced Plastics and Composites, 33(9) (2014) 810-823. doi:10.1177/0731684413518362.

- T.T.C.H. Yi-An Li, H. Shyh-Jiann, Shear Strength of Prestressed and Nonprestressed Concrete Beams. Concrete International, 39(9) (2017).

- A.M.J.-M.B.E.O. Antoni Cladera, R. Carlos, One-Way Shear Design Method Based on a Multi-Action Model. Concrete International, 39(9) (2017).

- A. Abu-Obaida, T. El-Maaddawy, B. El-Ariss, Numerical simulation of double-sided concrete corbels internally-reinforced with GFRP bars. Composites Part C: Open Access, 2 (2020) 100040. doi:10.1016/j.jcomc.2020.100040.

- ACI Committee 318, Building code requirements for structural concrete: An ACI Standard: Commentary on Building Code Requirements for Structural Concrete (ACI 318-19 and ACI 318R-19), American Concrete Institute. (2019). doi:10.14359/51716937.


Refbacks

  • There are currently no refbacks.


Bookmark and Share


Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

ISSN 2170-127X

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Based on a work at http://revue.ummto.dz.