Shear Strength of Conventional and Lightweight Concrete I-Beams with Fibrous Webs
Received: 15 June 2024 | Revised: 26 June 2024 | Accepted: 5 July 2024 | Online: 9 October 2024
Corresponding author: Abdullah Basil Raheem
Abstract
This study investigates the behavior of the shear strength of fibrous concrete I-beams made from normal and lightweight concrete that have the same compression strength, of about 30 MPa. Lightweight aggregate concrete was made by replacing 75% of the coarse aggregate with lightweight aggregate (Bonza stone). Fourteen concrete I-beams with dimensions of 1000×210×175 mm were divided into two groups. In the first group, the web area was reinforced with steel fiber added in 0.5%, 1%, and 1.5% of the mix volume. The second group was reinforced with glass fiber added in the same percentage as the steel fiber. The results showed that the shear strength of a Normal Concrete Beam with Steel Fibers (NCSF) is increased by 3.5%, 13.5%, and 13.3% for the addition ratios of 0.5%, 1%, and 1.5%, respectively, compared to the Normal Concrete Beam without Fibers (NC). Webs with glass fibers gain an increase of about 3.7% and 14.05% for the addition ratios of 0.5% and 1%, respectively, while the shear strength decreased by 6.21% for the addition ratio of 1.5%. On the other hand, the Lightweight Concrete Beam with Steel Fibers (LWCBSF) achieved greater shear strength than the Lightweight Concrete Beams without Fibers (LWCB) by 4.8%, 13.5%, and 10.9%; for the three additional percentages, respectively. The shear strength increased by 8.4% and 11.04% for the Lightweight Concrete Beam with Glass Fibers (LWCBGF) at 0.5% and 1% ratios, while the shear strength decreased by 11.9% for the 1.5% glass fibers ratio compared to the Lightweight concrete Beam without Glass Fibers (LWCB). The best performance, according to the ultimate load, was achieved when fibers were added at a ratio of 1% in normal and lightweight concrete compared to other ratios.
Keywords:
shear of I-beam, glass fibers, steel fibers, lightweight concreteDownloads
References
D. Shather, A. Ali, and H. Abed, "The Shear Behavior of Reinforced Concrete I-Beams With Polypropylene Fibers," Al-Nahrain Journal for Engineering Sciences (NJES), vol. 205, pp. 1040–1046, Nov. 2017.
M. Hillebrand, F. Teworte, and J. Hegger, "Shear fatigue of prestressed I-beams with shear reinforcement," Structural Concrete, vol. 22, no. 2, pp. 1085–1099, 2021.
Ahmed J. Qasim and N. M. Fawzi, "Enhancement of Perlite Concrete Properties containing Sustainable Materials by Incorporation of Hybrid Fibers," Engineering, Technology & Applied Science Research, vol. 14, no. 3, pp. 13870–13877, Jun. 2024.
R. M. Abbas and R. K. Rakaa, "Structural Performance of Lightweight Fiber Reinforced Polystyrene Aggregate Self-Compacted Concrete Beams," Engineering, Technology & Applied Science Research, vol. 13, no. 5, pp. 11865–11870, Oct. 2023.
M. Zahid and S. Al-Zaidee, "Validated Finite Element Modeling of Lightweight Concrete Floors Stiffened and Strengthened with FRP," Engineering, Technology & Applied Science Research, vol. 13, no. 4, pp. 11387–11392, Aug. 2023.
S. Rico, R. Farshidpour, and F. M. Tehrani, "State-of-the-Art Report on Fiber-Reinforced Lightweight Aggregate Concrete Masonry," Advances in Civil Engineering, vol. 2017, no. 1, pp. 8078346, 2017.
F. S. Klak and M. M. Jomaa’h, "Conventional and lightweight aggregate one-way reinforced concrete slabs subjected to fire and repeated loads: comparative experimental study," Australian Journal of Structural Engineering, vol. 25, no. 1, pp. 106–123, Jan. 2024.
P. Parmo, T. Tavio, H. Riadi, E. Suriani, K. Prianto, and F. Haqi, "The Mechanical Properties of Lightweight Concrete Made with Lightweight Aggregate Volcanic Pumice," Nov. 2018.
M. Al-Daraji and N. Aljalawi, "The Effect of Kevlar Fibers on the Mechanical Properties of Lightweight Perlite Concrete," Engineering, Technology & Applied Science Research, vol. 14, no. 1, pp. 12906–12910, Feb. 2024.
A. Mukkannan, B. Vijay, S. S. Mohamed, and R. V. Raj, "Experimental Investigation On Light Weight Concrete By Using Perlite And Glassfibre," International Journal of Scientific & Engineering Research, vol. 11, no. 3, pp. 93–100, 2020.
"Standard Specification for Lightweight Aggregates for Structural Concrete."
Iraqi Specification No. 45. Aggregate from Natural Sources for Concrete and Construction. Baghdad, Iraq: Central Organization for Standardization and Quality Control, 2019.
ASTM A615/A615M-20 : Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement. ASTM.
M. Anas, M. Khan, H. Bilal, S. Jadoon, and M. N. Khan, "Fiber Reinforced Concrete: A Review," Engineering Proceedings, vol. 22, no. 1, pp. 3, 2022.
S. S. H. AlAli, M. B. Abdulrahman, and B. A. Tayeh, "Response of Reinforced Concrete Tapered Beams Strengthened Using NSM-CFRP Laminates," Tikrit Journal of Engineering Sciences, vol. 29, no. 1, pp. 99–110, Jun. 2022.
Downloads
How to Cite
License
Copyright (c) 2024 Abdullah Basil Raheem, Fadya S. Klak
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain the copyright and grant the journal the right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) after its publication in ETASR with an acknowledgement of its initial publication in this journal.
