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Rehabilitation of Hybrid RC-I Beams with Openings Using CFRP Sheets

Ali I. Salahaldin, Muyasser M. Jomaa’h, Nazar A. Oukaili, Diyaree J. Ghaidan

Abstract


This research presents an experimental investigation of the rehabilitation efficiency of the damaged hybrid reinforced concrete beams with openings in the shear region. The study investigates the difference in retrofitting ability of hybrid beams compared to traditional beams and the effect of two openings compared with one opening equalized to two holes in the area. Five RC beams classified into two groups, A and B, were primarily tested to full-failure under two-point loads. The first group (A) contained beams with normal weight concrete. The second group (hybrid) included beams with lightweight concrete for web and bottom flange, whereas the top flange was made from normal concrete. Two types of openings were considered in this study, rectangular, with dimensions of 100×200 mm, and two square openings with a side dimension of 100 mm. A full wrapping configuration system for the shear region (failure zone) was adopted in this research. Based on the test results, the repaired beams managed to recover their load carrying capacity, stiffness, and structural performance in different degrees. The normal concrete beam regains its total capacity for all types of openings, while the hybrid beams gain 84% of their strength. The strength of hybrid concrete members compared with normal concrete is 81 and 88% for beams of one opening and two openings, respectively.

 

Doi: 10.28991/CEJ-2022-08-01-012

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Keywords


CFRP; Hybrid Concrete Beam; Openings in Shear Zone; Rehabilitation of Beams.

References


Abtan, G. Jaber, T. (2016). Behavior of Hybrid Reinforced Concrete Beams Combining Reactive Powder Concrete and Varying Ytpes of Lightweight Concrete. Journal of Engineering and Sustainable Development, 20(2), 204–223.

Kheder, G. F., Al Kafaji, J. M., & Dhiab, R. M. (2010). Flexural strength and cracking behavior of hybrid strength concrete beams. Materials and Structures/Materiaux et Constructions, 43(8), 1097–1111. doi:10.1617/s11527-009-9569-9.

Sada, M. J., & Resan, S. F. (2021). Structural behavior of hybrid reinforced concrete beams of trapezoidal section. Materials Today: Proceedings, 42, 2733–2741. doi:10.1016/j.matpr.2020.12.713.

Kammash, K. N. A., Mseer, A. H., & Eedan, O. A. A. 2020. Behavior of hybrid Reinforced Concrete Beams made with two types of concrete (Normal Weight and Reactive Powder Concrete). In IOP Conference Series: Materials Science and Engineering (Vol. 737, No. 1, p. 012011). IOP Publishing. doi:10.1088/1757-899X/737/1/012011.

Parhizkar, T., Najimi, M., & Pourkhorshidi, A. R. (2012). Application of pumice aggregate in structural lightweight concrete. Asian Journal of Civil Engineering, 13(1), 43–54.

Minapu, L. K., Ratnam, M. K. M. V., & Rangaraju, U. (2014). Experimental study on light weight aggregate concrete with pumice stone, silica fume and fly ash as a partial replacement of coarse aggregate. International Journal of Innovative Research in Science, Engineering and Technology, 3(12), 18130-18138.

Al-Mamoori, F. H. N., Al-Mamoori, M. H. N., & Najim, W. N. (2018). Production of Structural Light-Weight Aggregate Concrete Using Different Types of Iraqi Local Crushed Materials as Coarse Aggregate. Journal of University of Babylon for Engineering Sciences, 26(1), 362-375.

Suseno, H., Soehardjono, A., Wardana, I. N. G., & Rachmansyah, A. (2019). Relationship between mechanical properties of lightweight concretes made with medium-K basaltic andesitic pumice and Scoria. Journal of Engineering Science and Technology, 14(2), 698–711.

Tan, K. H., Mansur, M. A., & Huang, L. M. (1996). Reinforced concrete T-beams with large web openings in positive and negative moment regions. ACI Structural Journal, 93(3), 277–289. doi:10.14359/9687.

Mansur, M. A. (1998). Effect of openings on the behaviour and strength of R/C beams in shear. Cement and Concrete Composites, 20(6), 477–486. doi:10.1016/S0958-9465(98)00030-4.

Mansur, M. A., Tan, K. H., & Wei, W. (1999). Effects of creating an opening in existing beams. ACI Structural Journal, 96(6), 899–905. doi:10.14359/785.

El-Maaddawy, T., & El-Ariss, B. (2012). Behavior of Concrete Beams with Short Shear Span and Web Opening Strengthened in Shear with CFRP Composites. Journal of Composites for Construction, 16(1), 47–59. doi:10.1061/(asce)cc.1943-5614.0000237.

Mansur, M. A., & Tan, K. H. (1999). Concrete beams with openings: analysis and design. In Choice Reviews Online (Vol. 36, Issue 11). CRC Press. doi:10.5860/choice.36-6307.

Jomaah, M. M., & Diyaree, J. G. (2019). Energy Absorption Capacity Of Layered Lightweight Reinforced Concrete Beams With Openings In Web. Civil Engineering Journal, 5(3), 690-701. doi:10.28991/cej-2019-03091279.

Soudki, K. A. (2001). Concrete problems and repair techniques. Department of Civil Engineering, Univ. of Waterloo, Waterloo ON, Canada.

Alam, M. A., & Al Riyami, K. (2018). Shear strengthening of reinforced concrete beam using natural fibre reinforced polymer laminates. Construction and Building Materials, 162, 683–696. doi:10.1016/j.conbuildmat.2017.12.011.

Mahmoud, A. S., & Muhi, A. H. (2019). Unsymmetrical CFRP strengthening model of Edge Reinforced Concrete Beams. In AUS journal (Vol. 26, Issue 1, pp. 38–50). doi:10.4206/aus.2019.n26-1.4/www.ausrevista.com/editor@ausrevista.com.

Al-Mahaidi, R., Lee, K., & Taplin, G. (2004). Behavior and analysis of RC T-beams partially damaged in shear and repaired with CFRP laminates. In Structures - A Structural Engineering Odyssey, Structures 2001 - Proceedings of the 2001 Structures Congress and Exposition (Vol. 109). doi:10.1061/40558(2001)29.

Abdalla, H. A., Torkey, A. M., Haggag, H. A., & Abu-Amira, A. F. (2003). Design against cracking at openings in reinforced concrete beams strengthened with composite sheets. Composite Structures, 60(2), 197–204. doi:10.1016/S0263-8223(02)00305-7.

Ali, A. Y., Ibrahim, A. A., & Yousif, R. F. (2011). Analysis of Reinforced Concrete Beams with Openings and Strengthened by (CFRP) laminates. Journal of Babylon University, 19(3), 1098–1113.

Chin, S. C., Shafiq, N., & Nuruddin, M. F. (2014). FRP as strengthening material for Reinforced Concrete beams with openings - A review. KSCE Journal of Civil Engineering, 19(1), 213–219. doi:10.1007/s12205-011-0162-8.

Nie, X. F., Zhang, S. S., Teng, J. G., & Chen, G. M. (2018). Experimental study on RC T-section beams with an FRP-strengthened web opening. Composite Structures, 185, 273–285. doi:10.1016/j.compstruct.2017.11.018.

Godat, A., Hammad, F., & Chaallal, O. (2020). State-of-the-art review of anchored FRP shear-strengthened RC beams: A study of influencing factors. Composite Structures, 254, 112767. doi:10.1016/j.compstruct.2020.112767.

Fayyadh, M. M., & Razak, H. A. (2014). Analytical and experimental study on repair effectiveness of CFRP sheets for RC beams. Journal of Civil Engineering and Management, 20(1), 21–31. doi:10.3846/13923730.2013.799095.

Ahmed A, A., Naganathan, S., Nasharuddin, K., & Fayyadh, M. M. (2015). Repair effectiveness of CFRP and steel plates in RC beams with web opening: effect of plate thickness. International Journal of Civil Engineering, 13(2), 234-244. doi:10.22068/IJCE.13.2.234.

Ahmed, A., Naganathan, S., Nasharuddin, K., Fayyadh, M. M., & Jamali, S. (2016). Repair effectiveness of damaged RC beams with web opening using CFRP and steel plates. Jordan Journal of Civil Engineering, 10(2), 163–183. doi:10.14525/jjce.10.1.3534.

Abed, M. J., Fayyadh, M. M., & Khaleel, O. R. (2020). Effect of web opening diameter on performance and failure mode of CFRP repaired RC beams. Materials Today: Proceedings, 42, 388–398. doi:10.1016/j.matpr.2020.09.591.

Yu, F., Guo, S., Wang, S., & Fang, Y. (2019). Experimental study on high pre-cracked RC beams shear-strengthened with CFRP strips. Composite Structures, 225, 111163. doi:10.1016/j.compstruct.2019.111163.

Yu, F., Fang, Y., Guo, S., Bai, R., Yin, L., & Mansouri, I. (2021). A simple model for maximum diagonal crack width estimation of shear-strengthened pre-damaged beams with CFRP strips. Journal of Building Engineering, 41(September2021), 102716. doi:10.1016/j.jobe.2021.102716.

Oukaili, N. K., & Shammari, A. H. (2013). Response of reinforced concrete beams with multiple web openings to static load. Proceedings of the 4th Asia-Pacific Conference on FRP in Structures, APFIS 2013.

Hafiz, R. B., Ahmed, S., Barua, S., & Chowdhury, S. R. (2014). Effects of Opening on the Behavior of Reinforced Concrete Beam. IOSR Journal of Mechanical and Civil Engineering, 11(2), 52–61. doi:10.9790/1684-11275261.

IQS No. 45/1984. (1984) Natural aggregate using in concrete and building. In Iraqi Standard Specification (IQS), Central Organization for Standardization and Quality Control, Baghdad, Iraq.

ASTM C330. (2009). Standard Specification for Lightweight Aggregates for Structural Concrete. In ASTM International (Vol. 552, Issue 18, p. 4). doi:10.1520/c0330_c0330m-14.

ASTM C127. (2004). Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Coarse Aggregate. In Annual Book of ASTM Standards (pp. 1–5). doi:10.1520/c0127-15.

ASTM C29/C29M-09. (2009). Standard Test Method for Bulk Density (“Unit Weight”) and Voids in Aggregate. In ASTM International: Vol. I (Issue c, pp. 1–5). doi:10.1520/c0029_c0029m-09.

Kang, T. H. K., Howell, J., Kim, S., & Lee, D. J. (2012). A State-of-the-Art Review on Debonding Failures of FRP Laminates Externally Adhered to Concrete. International Journal of Concrete Structures and Materials, 6(2), 123–134. doi:10.1007/s40069-012-0012-1.

Osman, B. H., Wu, E., Ji, B., & Abdulhameed, S. S. (2017). Repair of Pre-cracked Reinforced Concrete (RC) Beams with Openings Strengthened Using FRP Sheets Under Sustained Load. International Journal of Concrete Structures and Materials, 11(1), 171–183. doi:10.1007/s40069-016-0182-3.

Spadea, G., Bencardino, F., & Swamy, R. N. (2000). Optimizing the performance characteristics of beams strengthened with bonded CFRP laminates. Materials and Structures/Materiaux et Constructions, 33(2), 119–126. doi:10.1007/BF02484166.

Haddad, R. H., Al-Rousan, R. Z., & Al-Sedyiri, B. K. (2013). Repair of shear-deficient and sulfate-damaged reinforced concrete beams using FRP composites. Engineering Structures, 56, 228–238. doi:10.1016/j.engstruct.2013.05.007.


Full Text: PDF

DOI: 10.28991/CEJ-2022-08-01-012

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