Prediction of Axial Compressive Strength of Hybrid Reinforced Concrete Columns under Static Loading | ||
| JES. Journal of Engineering Sciences | ||
| Article 1, Volume 51, Issue 1, January and February 2023, Pages 1-16 PDF (1.58 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.21608/jesaun.2022.149280.1153 | ||
| Authors | ||
| Mostafa Mohamed* 1; Abdel-Rahman Ahmed2; Mohamed Ahmed2; Omar A Farghal2 | ||
| 1PhD Graduate student, Civil Engineering Department, Faculty of Engineering, Assiut University, Assiut, Egypt | ||
| 2Professor, Civil Engineering Department, Faculty of Engineering, Assiut University, Assiut, Egypt | ||
| Abstract | ||
| Steel corrosion is thought to be one of the primary causes of the inadequate durability of concrete buildings in the maritime environment. Because of this, adopting Fiber-Reinforced Polymer (FRP) bars in harsh settings has attracted a lot of attention for its appealing mechanical properties as well as to prevent corrosion issues. But because there hasn't been much research in this area, we don't fully understand how fiber-reinforced polymer (FRP) bars behave when they are compressed. This work's goal is to assess the expected axial compressive strength of columns when hybrid reinforcement is used in place of steel reinforcement. Hybrid bars are steel bars surrounded by a cover shell of Glass or Carbon FRP (hybrid-steel) for longitudinal reinforcement and/or transverse reinforcement. 17 column specimens were included in an experimental study program that was created. The specimens were tested to failure with an axial loading condition. The parameters studied were the type of fibers, the percentage of steel in the hybrid reinforcement for longitudinal main reinforcement ρL(0.96, 0.44, and 0.25), the ratio of the web reinforcement (internal ties), the proportion of fiber in the hybrid bars, as well as the columns' cross sections' rectangularity. Based on the data, mathematical models were devised and assessed to forecast the load bearing capability of the column. The findings indicate that hybrid reinforced concrete columns have acceptable levels of dependability index in general. | ||
| Keywords | ||
| hybrid CFRP-steel; hybrid GFRP-steel; Columns; Compression | ||
| References | ||
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[1] A. C. 440:, “ACI Committee 440: Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures (ACI 440.2R-02); American Concrete Institute: Farmington Hills, MI, USA, 2008; p. 76.,” 2008.
[2] ACI Committee 440, Guide for the Design and Construction of Structural Concrete Reinforced with Fiber-Reinforced Polymer Bars (ACI 440.1R-15). American Concrete Institute. 2015.
[3] Canadian Standards Association, Canadian Standards Association Canadian Highway Bridge Design Code. CSA Code CAN/CSA-S6-06. 2006.
[4] G. Ma, Y. Huang, F. Aslani, and T. Kim, “Tensile and bonding behaviours of hybridized BFRP–steel bars as concrete reinforcement,” Constr. Build. Mater., vol. 201, pp. 62–71, 2019, doi: 10.1016/j.conbuildmat.2018.12.196.
[5] L. Alnajmi and F. Abed, “Evaluation of FRP bars under compression and their performance in RC columns,” Materials (Basel)., vol. 13, no. 20, pp. 1–19, 2020, doi: 10.3390/ma13204541.
[6] M. M. . Z. M. . Afifi, “BEHAVIOR OF CIRCULAR CONCRETE COLUMNS REINFORCED WITH FRP BARS AND STIRRUPS,” 2013.
[7] and A. Alsayed SH, Al-Salloum YA, Almusallam T H and MA, “Concrete columns reinforced by GFRP rod,” 4th Int. Symp. Fiber-Reinforced Polym. Reinf. Reinf. Concr. Struct. SP-188. C. W. Dolan SH Rizkalla A Nanni (eds), 8 January, pp. 103–112. Farmingt. Hills, MI Am. Concr. Inst., 1999.
[8] B. Afifi, Mohammad Z.Mohamed, Hamdy M.Benmokrane, “Axial Capacity of Circular Concrete Columns Reinforced with GFRP Bars and Spirals,” J. Compos. Constr., vol. 18, no. 1, p. 04013017, 2014, doi: 10.1061/(asce)cc.1943-5614.0000438.
[9] R. L. Pantelides CP, Gibbons ME, “Axial load behavior of concrete columns confined with GFRP spirals,” Constr, Compos, vol. 17, no. 3, 2013.
[10] and B. B. Tobbi, H., Farghaly A. S., “‘Concrete Columns Reinforced Longitudinally and Transversally with Glass Fiber-Reinforced Polymers Bars.’ AC I Structural Journal, 109 (4), 1-8.,” 2012.
[11] B. Tobbi, H.; Farghaly, A.S.; Benmokrane, “Behavior of concentri_cally loaded fiber-reinforced polymer reinforced concrete columns with varying reinforcement types and ratios,” ACI Struct. J. 111(2), 04016109, vol. 111, no. 2, 2014.
[12] Brown J, “The study of FRP strengthening of concrete structures to increase the serviceable design life in 1564 Advances in Structural Engineering 22(7) corrosive environments,” Res. Report, Univ. West. Aust. Perth, WA, Aust., 2012.
[13] A. De Luca, F. Matta, and A. Nanni, “Behavior of full-scale glass fiber-reinforced polymer reinforced concrete columns under axial load,” ACI Struct. J., vol. 107, no. 5, pp. 589–596, 2010, doi: 10.14359/51663912.
[14] J. Hadi, M.N.S., Youssef, “Experimental Investigation of GFRP-Reinforced and GFRP-Encased Square Concrete Specimens under Axial and Eccentric Load, and Four-Point Bending Test,” J. Compos. Constr., vol. Volume 20, no. Issue 5, 2016.
[15] B. B. Hadhood A, Mohamed HM, “Axial Load-Moment Interaction Diagram of Circular Concrete Columns Reinforced with CFRP Bars and Spirals: Experimental and Theoretical Investigations. J Compos Construct, ASCE 2017;21 (2):04016092. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000748.,” 2017.
[16] O. A. Farghal and H. M. A. Diab, “Prediction of axial compressive strength of reinforced concrete circular short columns confined with carbon fiber reinforced polymer wrapping sheets,” J. Reinf. Plast. Compos., vol. 32, no. 19, pp. 1406–1418, 2013, doi: 10.1177/0731684413499830.
[17] E. code for design principals and construc tion specifications of using F. system for Construction., F. and Egypt: Ministry of Housing, N. C. for Constructional Development, and 2005. Housing and Construction Research, EC 208. 2005.
[18] ECP203, ECP203-2020. .
[19] Haytham F. Isleem Daiyu Wang Zhenyu Wang, “Axial stress–strain model for square concrete columns internally confined with GFRP hoops,” Mag. Concr. Res., vol. 70, no. 20, pp. 1064–1079, 2018.
[20] CSA, CSA A23.3:19 Design of concrete structures. 2019.
[21] CSA, CSA S6 - Canadian highway bridge design code. 2017.
[22] M. M. A. and O. A. F. Mostafa Ahmed Mohamed, Abd El-Rahman Megahid Ahmed, “STRUCTURAL BEHAVIOROF HYBRID. REINFORCED COLUMNSUNDER STATIC LOADING.” Recent Applications and Future Challenges International Conferences(ICCE2021. Hurghada, Egypt. | ||
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