Experimental Study of Large-scale RC Beams Shear-Strengthened with Basalt FRP Sheets
Over the last three decades, many experimental studies have been conducted to investigate the behavior of Reinforced Concrete (RC) beams, shear strengthened with externally bonded Fiber-Reinforced Polymer (FRP) composite. However, the majority of experimental studies have focused on small- to medium-scale beam specimens. As a result, most design equations that have been developed as part of these studies may thus not be accurate at predicting the shear strength of large-scale RC beams shear-strengthened with FRP sheets. This study thus involved performing tests on six specimens to study the effect of the larger scale, along with new variables such as beam width, new varieties of FRP sheets (basalt FRP (BFRP)), and the strengthening configuration (U-jacketing), on the prediction of the ultimate load of RC beams strengthened with externally bonded FRP composite. The experimental results were analyzed and showed that all these variables affected the lateral strain along the bottom and the top of the beams. It was found that variations in the depth to width ratio of the beams caused the failure angle to vary as well. For beams strengthened with BFRP sheets, both the cracking and ultimate load increased to 1.19 and 1.94 times the cracking and ultimate load of the control beams under identical conditions.
ACI Committee 440. “Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures.” (ACI 440.2R-17). American Concrete Institute, Farmington Hills, Michigan, USA. (2017).
Triantafillou, Thanasis C., and Costas P. Antonopoulos. “Design of Concrete Flexural Members Strengthened in Shear with FRP.” Journal of Composites for Construction 4, no. 4 (November 2000): 198–205. doi:10.1061/(asce)1090-0268(2000)4:4(198).
Matthys, Stijn, and Thanasis Triantafillou. “Shear and Torsion Strengthening with Externally Bonded FRP Reinforcement.” Composites in Construction (December 18, 2001): 203-212. doi:10.1061/40596(264)22.
Mofidi, Amir, and Omar Chaallal. "Shear strengthening of RC beams with EB FRP: Influencing factors and conceptual debonding model." Journal of Composites for Construction 15, no. 1 (2011): 62-74. doi:10.1061/(ASCE)CC.1943-5614.0000153.
Ye L.P., Lu X.Z., and Chen J.F. “Design Proposals for Debonding Strengths of FRP Strengthened RC Beams in the Chinese Design Code.” Proc., Int. Symp. on Bond Behaviour of FRP in Structures, International Institute for FRP in Construction (IIFC), Hong Kong, China, December (2005): 55-62.
Cao, S. Y., J. F. Chen, J. G. Teng, Z. Hao, and J. Chen. "Debonding in RC beams shear strengthened with complete FRP wraps." Journal of Composites for Construction 9, no. 5 (2005): 417-428. doi:10.1061/(ASCE)1090-0268(2005)9:5(417).
Carolin, Anders, and Björn Täljsten. "Theoretical study of strengthening for increased shear bearing capacity." Journal of Composites for Construction 9, no. 6 (2005): 497-506. doi:10.1061/(ASCE)1090-0268(2005)9:6(497).
Colotti, Vincenzo, Giuseppe Spadea, and R. Narayan Swamy. "Analytical model to evaluate failure behavior of plated reinforced concrete beams strengthened for shear." Structural Journal 101, no. 6 (2004): 755-764.
Sayed, Ahmed M., Xin Wang, and Zhishen Wu. "Modeling of shear capacity of RC beams strengthened with FRP sheets based on FE simulation." Journal of Composites for Construction 17, no. 5 (2013): 687-701. doi:10.1061/(ASCE)CC.1943-5614.0000382.
Adhikary, Bimal Babu, and Hiroshi Mutsuyoshi. "Behavior of concrete beams strengthened in shear with carbon-fiber sheets." Journal of composites for construction 8, no. 3 (2004): 258-264. doi:10.1061/(ASCE)1090-0268(2004)8:3(258).
Zhang, Zhichao, and Cheng-Tzu Thomas Hsu. "Shear strengthening of reinforced concrete beams using carbon-fiber-reinforced polymer laminates." Journal of composites for construction 9, no. 2 (2005): 158-169. doi:10.1061/(ASCE)1090-0268(2005)9:2(158).
Spinella, Nino. "Modeling of shear behavior of reinforced concrete beams strengthened with FRP." Composite Structures 215 (2019): 351-364. doi:10.1016/j.compstruct.2019.02.073.
Issa, Mohsen A., Thilan Ovitigala, and Mustapha Ibrahim. “Shear Behavior of Basalt Fiber Reinforced Concrete Beams with and Without Basalt FRP Stirrups.” Journal of Composites for Construction 20, no. 4 (August 2016): 04015083. doi:10.1061/(asce)cc.1943-5614.0000638.
Shen, Dejian, Xuan Zeng, Jinyang Zhang, Baizhong Zhou, and and Wei Wang. "Behavior of RC box beam strengthened with basalt FRP using end anchorage with grooving." Journal of Composite Materials 53, no. 23 (2019): 3307-3324. doi:10.1177/0021998319826376.
Guo, Rui, Lianheng Cai, Shinichi Hino, and Bo Wang. "Experimental Study on Shear Strengthening of RC Beams with an FRP Grid-PCM Reinforcement Layer." Applied Sciences 9, no. 15 (2019): 2984. doi:10.3390/app9152984.
Atutis, Mantas, Juozas Valivonis, and Edgaras Atutis. “Experimental Study of Concrete Beams Prestressed with Basalt Fiber Reinforced Polymers. Part I: Flexural Behavior and Serviceability.” Composite Structures 183 (January 2018): 114–123. doi:10.1016/j.compstruct.2017.01.081.
Kadhim, Asaad M. H., Hesham A. Numan, and Mustafa Özakça. “Flexural Strengthening and Rehabilitation of Reinforced Concrete Beam Using BFRP Composites: Finite Element Approach.” Advances in Civil Engineering 2019 (March 4, 2019): 1–17. doi:10.1155/2019/4981750.
Joyklad, Panuwat, Suniti Suparp, and Qudeer Hussain. “Flexural Response of JFRP and BFRP Strengthened RC Beams.” International Journal of Engineering and Technology (November 3, 2019): 203–207. doi:10.7763/ijet.2019.v11.1147.
Colajanni, Piero, Lidia La Mendola, Antonino Recupero, and Nino Spinella. “Stress Field Model for Strengthening of Shear-Flexure Critical RC Beams.” Journal of Composites for Construction 21, no. 5 (October 2017): 04017039. doi:10.1061/(asce)cc.1943-5614.0000821.
Wu, Qiaoyun, Shiye Xiao, and Kentaro Iwashita. “Experimental Study on the Interfacial Shear Stress of RC Beams Strengthened with Prestressed BFRP Rod.” Results in Physics 10 (September 2018): 427–433. doi:10.1016/j.rinp.2018.06.007.
Pellegrino, Carlo, and Claudio Modena. "Fiber reinforced polymer shear strengthening of reinforced concrete beams with transverse steel reinforcement." Journal of Composites for Construction 6, no. 2 (2002): 104-111. doi:10.1061/(ASCE)1090-0268(2002)6:2(104).
Sayed, Ahmed M., Xin Wang, and Zhishen Wu. “Finite Element Modeling of the Shear Capacity of RC Beams Strengthened with FRP Sheets by Considering Different Failure Modes.” Construction and Building Materials 59 (May 2014): 169–179. doi:10.1016/j.conbuildmat.2014.02.044.
Deniaud, Christophe, and JJ Roger Cheng. “Review of Shear Design Methods for Reinforced Concrete Beams Strengthened with Fibre Reinforced Polymer Sheets.” Canadian Journal of Civil Engineering 28, no. 2 (April 1, 2001): 271–281. doi:10.1139/l00-113.
Ahmed, Ehab A., Ehab F. El-Salakawy, and Brahim Benmokrane. “Shear Performance of RC Bridge Girders Reinforced with Carbon FRP Stirrups.” Journal of Bridge Engineering 15, no. 1 (January 2010): 44–54. doi:10.1061/(asce)be.1943-5592.0000035.
Belarbi A., Murphy M., and Bae S.W. “Shear Strengthening of Full-Scale RC T-Beams with CFRP Sheets.” APFIS 2012, Hokkaido University, Japan, (2-4 February 2012), S1A02.
Godat, Ahmed, and Omar Chaallal. “Strut-and-Tie Method for Externally Bonded FRP Shear-Strengthened Large-Scale RC Beams.” Composite Structures 99 (May 2013): 327–338. doi:10.1016/j.compstruct.2012.11.034.
Matta F., Nanni A., Galati N., and Mosele F. “Size Effect on Shear Strength of Concrete Beams Reinforced with FRP Bars.” Proc. 6th Int. Conf. on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-6), Catania, Italy, (June 17-22, 2007): 8 pp.
- There are currently no refbacks.
Copyright (c) 2020 Ahmed M. Sayed
This work is licensed under a Creative Commons Attribution 4.0 International License.