Structural Performance of Reinforced Concrete Beams with Steel Fibres as Secondary Reinforcement: Experimental and Pre-peak Numerical Modelling
This research consists of an experimental and a numerical investigation into improving the structural performance of reinforced concrete (RC) beams by incorporating hooked-end steel fibres. Experimentally, steel fibres were added to the concrete matrix of 80 mm × 180 mm × 1500 mm RC beams with fibr...
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University Amar Telidji of Laghouat
2024-12-01
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| Series: | Journal of Building Materials and Structures |
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| Online Access: | http://journals.lagh-univ.dz/index.php/jbms/article/view/4084 |
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| author | Hadjer Belkadi Abdelkrim Bourzam Messaoud Saidani |
| author_facet | Hadjer Belkadi Abdelkrim Bourzam Messaoud Saidani |
| author_sort | Hadjer Belkadi |
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This research consists of an experimental and a numerical investigation into improving the structural performance of reinforced concrete (RC) beams by incorporating hooked-end steel fibres. Experimentally, steel fibres were added to the concrete matrix of 80 mm × 180 mm × 1500 mm RC beams with fibre contents of 0%, 0.5%, and 1%, without replacing traditional reinforcement bars. Each beam underwent a four-point flexural test using a hydraulic press under static loading to evaluate the influence of fibres on flexural behaviour. The numerical analysis aimed to model the macro-scale flexural behaviour of RC beams using a 3D finite element approach in ABAQUS. Challenges in modelling steel fibres include their discrete nature and computational demands due to intricate meshing and convergence issues. The Simplified Concrete Damaged Plasticity Model was used to characterize the compressive and tensile behaviours of plain and steel fibre reinforced concretes. Nonlinear finite element analysis was performed to predict pre-peak load versus mid-span deflection and crack propagation. The model, which does not explicitly simulate steel fibres, was validated against experimental data, showing strong agreement and confirming its effectiveness in capturing the flexural behaviour of steel fibre reinforced concrete beams. Experiments Results showed that steel fibres enhance the flexural performance. Beams with steel fibres exhibited higher first crack loads, ultimate loads, flexural strengths, and toughness. Additionally, the fibres increased crack numbers, reduced crack spacing and length, and improved post-cracking behaviour. The simulation results were subsequently validated against experimental data. The results of the numerical finite element analysis were in good agreement with those of the experiments.
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| format | Article |
| id | doaj-art-1ff5215b10e747fbb2e39efcb6ce4dd9 |
| institution | Kabale University |
| issn | 2353-0057 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | University Amar Telidji of Laghouat |
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| series | Journal of Building Materials and Structures |
| spelling | doaj-art-1ff5215b10e747fbb2e39efcb6ce4dd92025-01-27T21:00:32ZengUniversity Amar Telidji of LaghouatJournal of Building Materials and Structures2353-00572024-12-0111210.34118/jbms.v11i2.4084Structural Performance of Reinforced Concrete Beams with Steel Fibres as Secondary Reinforcement: Experimental and Pre-peak Numerical ModellingHadjer Belkadi0Abdelkrim Bourzam 1Messaoud Saidani2Laboratory of Built Environment Research, University of Sciences and Technology. Houari Boumediene (USTHB). Faculty of Civil Engineering. BP 32. El Alia. Bab Ezzouar. Algiers. 16111. AlgeriaEcole Nationale Polytechnique (ENP), Algiers, LMGCE/ENP & LBE/USTHB Research laboratories 10, Rue des Frères OUDEK, El Harrach 16200, Algiers, Algeria.Faculty of Engineering. Environment and Computing. School of Energy. Construction and Environment. Coventry University. Priory Street. Coventry CV1 5FB. United Kingdom This research consists of an experimental and a numerical investigation into improving the structural performance of reinforced concrete (RC) beams by incorporating hooked-end steel fibres. Experimentally, steel fibres were added to the concrete matrix of 80 mm × 180 mm × 1500 mm RC beams with fibre contents of 0%, 0.5%, and 1%, without replacing traditional reinforcement bars. Each beam underwent a four-point flexural test using a hydraulic press under static loading to evaluate the influence of fibres on flexural behaviour. The numerical analysis aimed to model the macro-scale flexural behaviour of RC beams using a 3D finite element approach in ABAQUS. Challenges in modelling steel fibres include their discrete nature and computational demands due to intricate meshing and convergence issues. The Simplified Concrete Damaged Plasticity Model was used to characterize the compressive and tensile behaviours of plain and steel fibre reinforced concretes. Nonlinear finite element analysis was performed to predict pre-peak load versus mid-span deflection and crack propagation. The model, which does not explicitly simulate steel fibres, was validated against experimental data, showing strong agreement and confirming its effectiveness in capturing the flexural behaviour of steel fibre reinforced concrete beams. Experiments Results showed that steel fibres enhance the flexural performance. Beams with steel fibres exhibited higher first crack loads, ultimate loads, flexural strengths, and toughness. Additionally, the fibres increased crack numbers, reduced crack spacing and length, and improved post-cracking behaviour. The simulation results were subsequently validated against experimental data. The results of the numerical finite element analysis were in good agreement with those of the experiments. http://journals.lagh-univ.dz/index.php/jbms/article/view/4084Reinforced Concrete beamsSecondary ReinforcementFlexural behavioursteel fibresFEM modellingcrack patterns |
| spellingShingle | Hadjer Belkadi Abdelkrim Bourzam Messaoud Saidani Structural Performance of Reinforced Concrete Beams with Steel Fibres as Secondary Reinforcement: Experimental and Pre-peak Numerical Modelling Journal of Building Materials and Structures Reinforced Concrete beams Secondary Reinforcement Flexural behaviour steel fibres FEM modelling crack patterns |
| title | Structural Performance of Reinforced Concrete Beams with Steel Fibres as Secondary Reinforcement: Experimental and Pre-peak Numerical Modelling |
| title_full | Structural Performance of Reinforced Concrete Beams with Steel Fibres as Secondary Reinforcement: Experimental and Pre-peak Numerical Modelling |
| title_fullStr | Structural Performance of Reinforced Concrete Beams with Steel Fibres as Secondary Reinforcement: Experimental and Pre-peak Numerical Modelling |
| title_full_unstemmed | Structural Performance of Reinforced Concrete Beams with Steel Fibres as Secondary Reinforcement: Experimental and Pre-peak Numerical Modelling |
| title_short | Structural Performance of Reinforced Concrete Beams with Steel Fibres as Secondary Reinforcement: Experimental and Pre-peak Numerical Modelling |
| title_sort | structural performance of reinforced concrete beams with steel fibres as secondary reinforcement experimental and pre peak numerical modelling |
| topic | Reinforced Concrete beams Secondary Reinforcement Flexural behaviour steel fibres FEM modelling crack patterns |
| url | http://journals.lagh-univ.dz/index.php/jbms/article/view/4084 |
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