Experimental and Theoretical Analysis of Cracking Moment of Concrete Beams Reinforced with Hybrid Fiber Reinforced Polymer and Steel Rebars

Hiep Dang Vu; Duy Nguyen Phan

doi:10.46604/aiti.2021.7330

Authors

Hiep Dang Vu Civil Engineering Faculty, Hanoi Architectural University, Vietnam
Duy Nguyen Phan Faculty of Civil Engineering, Mientrung University of Civil Engineering, Vietnam

DOI:

https://doi.org/10.46604/aiti.2021.7330

Keywords:

concrete beam, fiber reinforced polymer (FRP), hybrid reinforcement, cracking moment, flexural behavior

Abstract

This study aims at experimentally and theoretically investigating the cracking moment (M_crc) of hybrid Fiber Reinforced Polymer (FRP)/steel Reinforced Concrete (RC) beams. Six hybrid Glass FRP (GFRP)/steel and three GFRP RC beams with various GFRP and steel reinforcement ratios are tested in four-point bending scheme. Experimental results indicate that both GFRP and steel rebars affect M_crc, but the effect of steel reinforcement is more significant. When the steel reinforcement ratio increases to 1.17%, M_crc goes up to 15.9%, while the same value for GFRP is only 9.7%. An analytical method is proposed based on the plain section assumption and nonlinear behavior of materials for estimating M_crc. The proposed model shows a good agreement with the experimental data conducted in this study and collected from the literature. The results of the parametric study give evidence of the positive effects of hybrid reinforcement ratios and elastic modulus of FRP on M_crc of hybrid RC beams.

Author Biography

Hiep Dang Vu, Civil Engineering Faculty, Hanoi Architectural University, Vietnam

Civil engineering faculty, Hanoi Architectural University, Vietnam

References

S. A. Jabbar and S. B. H. Farid, “Replacement of Steel Rebars by GFRP Rebars in the Concrete Structures,” Karbala International Journal of Modern Science, vol. 4, no. 2, pp. 216-227, June 2018.

C. Jeetendra, K. Suresh, and A. Hussain, “Application of FRP in Concrete Structures,” International Journal of Engineering Associates, vol. 4, no. 8, pp. 50-51, August 2015.

C. Barris, L. Torres, J. Comas, and C. Miàs, “Cracking and Deflections in GFRP RC Beams: An Experimental Study,” Composites Part B: Engineering, vol. 55, pp. 580-590, December 2013.

W. Qu, X. Zhang, and H. Huang, “Flexural Behavior of Concrete Beams Reinforced with Hybrid (GFRP and Steel) Bars,” Journal of Composites for Construction, vol. 13, no. 5, pp. 350-359, Octorber 2009.

D. Lau and H. Pam, “Experimental Study of Hybrid FRP Reinforced Concrete Beams,” Engineering Structures, vol. 32, no. 12, pp. 3857-3865, December 2010.

J. Zhang, W. Ge, H. Dai, and Y. Tu, “Study on the Flexural Capacity of Concrete Beam Hybrid Reinforced with FRP Bars and Steel Bars,” 5th International Conference on FRP Composites in Civil Engineering, September 2010, pp. 304-307.

S. H. Alsayed and A. M. Alhozaimy, “Ductility of Concrete Beams Reinforced with FRP Bars and Steel Fibers,” Journal of Composite Materials, vol. 33, no. 19, pp. 1792-1806, October 1999.

M. A. Aiello and L. Ombres, “Structural Performances of Concrete Beams with Hybrid (Fiber-Reinforced Polymer-Steel) Reinforcements,” Journal of Composites for Construction, vol. 6, no. 2, pp. 133-140, January 2002.

K. H. Tan, “Behavior of Hybrid FRP-Steel Reinforced Concrete Beams,” 3rd International Symposium on Non-Metallic (FRP) Reinforcement for Concrete Structures, October 1997, pp. 487-493.

P. D. Nguyen, V. H. Dang, and N. A. Vu, “Performance of Concrete Beams Reinforced with Various Ratios of Hybrid GFRP/Steel Bars,” Civil Engineering Journal, vol. 6, no. 9, pp. 1652-1669, September 2020.

I. Kara, A. Ashour, and M. Köroğlu, “Flexural Behavior of Hybrid FRP/Steel Reinforced Concrete Beams,” Composite Structures, vol. 129, pp. 111-121, October 2015.

L. Pang, W. Qu, P. Zhu, and J. Xu, “Design Propositions for Hybrid FRP-Steel Reinforced Concrete Beams,” Journal of Composites for Construction, vol. 20, no. 4, 04015086, August 2016.

X. Gu, Y. Dai, and J. Jiang, “Flexural Behavior Investigation of Steel-GFRP Hybrid-Reinforced Concrete Beams Based on Experimental and Numerical Methods,” Engineering Structures, vol. 206, 110117, March 2020.

B. Jia, S. Liu, X. Liu, and R. Wang, “Flexural Capacity Calculation of Hybrid Bar Reinforced Concrete Beams,” Materials Research Innovations, vol. 18, no. Supp 2, pp. S2-836-S2-840, May 2014.

J. Zhang, W. Ge, H. Dai, and Y. Tu, “Study on the Flexural Capacity of Concrete Beam Hybrid Reinforced with FRP Bars and Steel Bars,” 5th International Conference on FRP Composites in Civil Engineering, September 2010, pp. 304-307.

Y. Yang, Z. Y. Sun, G. Wu, D. F. Cao, and Z. Q. Zhang, “Flexural Capacity and Design of Hybrid FRP-Steel-Reinforced Concrete Beams,” Advances in Structural Engineering, vol. 23, no. 7, pp. 1290-1304, May 2020.

N. Duy Phan and D. Viet Quoc, “Limiting Reinforcement Ratios for Hybrid GFRP/Steel Reinforced Concrete Beams,” International Journal of Engineering and Technology Innovation, vol. 11, no. 1, pp. 1-11, January 2021.

F. Maleki and A. Kheyroddin, “Investigation of Cracking Moment in RC Beams with GFRP Bars,” vol. 2, pp. 37-47, January 2017.

X. Ruan, C. Lu, K. Xu, G. Xuan, and M. Ni, “Flexural Behavior and Serviceability of Concrete Beams Hybrid-Reinforced with GFRP Bars and Steel Bars,” Composite Structures, vol. 235, 111772, March 2020.

G. Xingyu, D. Yiqing, and J. Jiwang, “Flexural Behavior Investigation of Steel-GFRP Hybrid-Reinforced Concrete Beams Based on Experimental and Numerical Methods,” Engineering Structures, vol. 206, pp. 110-117, March 2020.

W. Ge, J. Zhang, D. Cao, and Y. Tu, “Flexural Behaviors of Hybrid Concrete Beams Reinforced with BFRP Bars and Steel Bars,” Construction and Building Materials, vol. 87, pp. 28-37, July 2015.

H. Alkhudery, O. Albuthbahak, and H. Alkatib, “Investigation of Effective Hybrid FRP and Steel Reinforcement Ratio for Concrete Members,” Journal of Engineering and Applied Sciences, vol. 13, no. 13, pp. 5150-5161, September 2018.

S. Kim and S. Kim, “Flexural Behavior of Concrete Beams with Steel Bar and FRP Reinforcement,” Journal of Asian Architecture and Building Engineering, vol. 18, no. 2, pp. 89-97, May 2019.

W. Ge, Y. Wang, A. Ashour, W. Lu, and D. Cao, “Flexural Performance of Concrete Beams Reinforced with Steel-FRP Composite Bars,” Archives of Civil and Mechanical Engineering, vol. 20, pp. 1-17, June 2020.

A. S. Mohamed, “Flexural Behavior and Design of Steel-GFRP Reinforced Concrete Beams,” ACI Materials Journal, vol. 110, no. 6, pp. 677-686, November 2013.

S. Kartal and I. Kalkan, “First Cracking Moments of Hybrid Fiber Reinforced Polymer-Steel Reinforced Concrete Beams,” International Journal of Civil and Environmental Engineering, vol. 13, no. 9, pp. 527-533, 2019.

J. Valivonis and T. Skuturna, “Cracking and Strength of Reinforced Concrete Structures in Flexure Strengthened with Carbon Fibre Laminates,” Journal of Civil Engineering and Management, vol. 13, pp. 317-323, December 2007.

D. Gao, P. You, and Z. Changhui, “Crack Resistant Performance and Crack Width of One-Way Slabs Strengthened with FRP,” Applied Mechanics and Materials, vols. 71-78, pp. 3810-3815, July 2011.

ACI committee 440, “Guide for the Design and Construction of Structural Concrete Reinforced with Fiber-Reinforced Polymer (FRP) Bars,”American Concrete Institute, ACI440.1R-15, March 2015.

J. C. McCormac and R. H. Brown, Design of Reinforced Concrete, 10th ed. United States: Wiley, 2015.

W. J. Ge, A. F. Ashour, J. Yu, P. Gao, D. F. Cao, C. Cai, et al., “Flexural Behavior of ECC-Concrete Hybrid Composite Beams Reinforced with FRP and Steel Bars,” Journal of Composites for Construction, vol. 23, no. 1, 04018069, February 2019.

S. F. Liu, M. Y. Hou, X. Liu, and R. H. Wang, “Analysis of Cracking Moment and Immediate Deflection in FRP Rebars Reinforced Concrete Beams,” Advanced Materials Research, vols. 671-674, pp. 618-621, March 2013.

Concrete and Reinforced Concrete Structures, Russian Technical Standard SP 63.13330, 2019.