Structural efficiency of fly-ash based concrete beam-column joint reinforced by hybrid GFRP and steel bars
In this paper, the structural performance of exterior fly-ash based concrete beam-column joints reinforced with hybrid glass fiber reinforced polymer (GFRP) and steel bars was studied, to inspect the hybrid concept efficiency under lateral loads. This paper studied two mixes of concrete, normal stre...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524000780 |
| _version_ | 1797320995281829888 |
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| author | Mohamed Selim, Dr Riham Khalifa Eman Elshamy Mahmoud Zaghlal |
| author_facet | Mohamed Selim, Dr Riham Khalifa Eman Elshamy Mahmoud Zaghlal |
| author_sort | Mohamed Selim, Dr |
| collection | DOAJ |
| description | In this paper, the structural performance of exterior fly-ash based concrete beam-column joints reinforced with hybrid glass fiber reinforced polymer (GFRP) and steel bars was studied, to inspect the hybrid concept efficiency under lateral loads. This paper studied two mixes of concrete, normal strength concrete (NC) and fly-ash based concrete (FC), a 20% replacement ratio of the cement weight with superplasticizer is considered in FC mix, which is considered as an environmental-friendly and cost-effective alternative to ordinary Portland cement. Ten joints were tested under the effect of monotonic lateral load experimentally. The studied joints were divided into two groups based on their concrete type, in each group, five joints with different GFRP to steel ratios “from 0% to 100% with an increment of 25%” were tested. The obtained results showed that the fly ash presence in concrete resulted in an average increase in both ductility and load capacity of 18% and 28.3%, respectively. Also, the average total energy absorption increased by 35%, and the average initial and post-yield stiffness increased by 34% and 41%, respectively. Moreover, the ductility index for each model was obtained, the FC model with 75% GFRP to steel ratio achieved the maximum ductility index, so it was considered as the optimum one. After that, the finite element analysis FEA was utilized to study the performance of the tested beam-column joints. The FEA showed identical results compared to the experimental ones concerning energy absorption, load capacity, and model stiffness. Finally, using FEA, a deep parametric study on FC models reinforced with GFRP to steel bars ranging from 60% to 90% was performed to obtain the optimum GFRP to steel reinforcement ratio. Through the performed parametric study, it was found that the optimum range of the reinforcement ratio was 68% to 82%. According to this research, the usage of fly ash in concrete increased RC beam-column joints' efficiency especially when provided with hybrid GFRP and steel reinforcement, in addition to the important environmental impact achieved through the recycling process. It was recommended to utilize the composite reinforcement ranging between 60% to 75% GFRP to steel bars in the presence of fly ash-based concrete for the beam-column joints. |
| first_indexed | 2024-03-08T04:51:07Z |
| format | Article |
| id | doaj.art-ec6020e57a954187b515e760d888d92b |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-08T04:51:07Z |
| publishDate | 2024-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-ec6020e57a954187b515e760d888d92b2024-02-08T05:08:57ZengElsevierCase Studies in Construction Materials2214-50952024-07-0120e02927Structural efficiency of fly-ash based concrete beam-column joint reinforced by hybrid GFRP and steel barsMohamed Selim, Dr0Riham Khalifa1Eman Elshamy2Mahmoud Zaghlal3Structural Engineering Dept., Faculty of Engineering, Zagazig University, P.O. 44519, Zagazig, Egypt; Correspondence to: Faculty of engineering, Zagazig University, Structural engineering department, Zagazig, Sharkia.Civil Engineering Dept., Delta Higher Institute for Engineering and Technology, Mansoura, EgyptStructural Engineering Dept., Faculty of Engineering, Zagazig University, P.O. 44519, Zagazig, EgyptStructural Engineering Dept., Faculty of Engineering, Zagazig University, P.O. 44519, Zagazig, EgyptIn this paper, the structural performance of exterior fly-ash based concrete beam-column joints reinforced with hybrid glass fiber reinforced polymer (GFRP) and steel bars was studied, to inspect the hybrid concept efficiency under lateral loads. This paper studied two mixes of concrete, normal strength concrete (NC) and fly-ash based concrete (FC), a 20% replacement ratio of the cement weight with superplasticizer is considered in FC mix, which is considered as an environmental-friendly and cost-effective alternative to ordinary Portland cement. Ten joints were tested under the effect of monotonic lateral load experimentally. The studied joints were divided into two groups based on their concrete type, in each group, five joints with different GFRP to steel ratios “from 0% to 100% with an increment of 25%” were tested. The obtained results showed that the fly ash presence in concrete resulted in an average increase in both ductility and load capacity of 18% and 28.3%, respectively. Also, the average total energy absorption increased by 35%, and the average initial and post-yield stiffness increased by 34% and 41%, respectively. Moreover, the ductility index for each model was obtained, the FC model with 75% GFRP to steel ratio achieved the maximum ductility index, so it was considered as the optimum one. After that, the finite element analysis FEA was utilized to study the performance of the tested beam-column joints. The FEA showed identical results compared to the experimental ones concerning energy absorption, load capacity, and model stiffness. Finally, using FEA, a deep parametric study on FC models reinforced with GFRP to steel bars ranging from 60% to 90% was performed to obtain the optimum GFRP to steel reinforcement ratio. Through the performed parametric study, it was found that the optimum range of the reinforcement ratio was 68% to 82%. According to this research, the usage of fly ash in concrete increased RC beam-column joints' efficiency especially when provided with hybrid GFRP and steel reinforcement, in addition to the important environmental impact achieved through the recycling process. It was recommended to utilize the composite reinforcement ranging between 60% to 75% GFRP to steel bars in the presence of fly ash-based concrete for the beam-column joints.http://www.sciencedirect.com/science/article/pii/S2214509524000780Fly ashRecycled concreteBeam-Column JointHybrid reinforcementGFRPLateral loading |
| spellingShingle | Mohamed Selim, Dr Riham Khalifa Eman Elshamy Mahmoud Zaghlal Structural efficiency of fly-ash based concrete beam-column joint reinforced by hybrid GFRP and steel bars Case Studies in Construction Materials Fly ash Recycled concrete Beam-Column Joint Hybrid reinforcement GFRP Lateral loading |
| title | Structural efficiency of fly-ash based concrete beam-column joint reinforced by hybrid GFRP and steel bars |
| title_full | Structural efficiency of fly-ash based concrete beam-column joint reinforced by hybrid GFRP and steel bars |
| title_fullStr | Structural efficiency of fly-ash based concrete beam-column joint reinforced by hybrid GFRP and steel bars |
| title_full_unstemmed | Structural efficiency of fly-ash based concrete beam-column joint reinforced by hybrid GFRP and steel bars |
| title_short | Structural efficiency of fly-ash based concrete beam-column joint reinforced by hybrid GFRP and steel bars |
| title_sort | structural efficiency of fly ash based concrete beam column joint reinforced by hybrid gfrp and steel bars |
| topic | Fly ash Recycled concrete Beam-Column Joint Hybrid reinforcement GFRP Lateral loading |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524000780 |
| work_keys_str_mv | AT mohamedselimdr structuralefficiencyofflyashbasedconcretebeamcolumnjointreinforcedbyhybridgfrpandsteelbars AT rihamkhalifa structuralefficiencyofflyashbasedconcretebeamcolumnjointreinforcedbyhybridgfrpandsteelbars AT emanelshamy structuralefficiencyofflyashbasedconcretebeamcolumnjointreinforcedbyhybridgfrpandsteelbars AT mahmoudzaghlal structuralefficiencyofflyashbasedconcretebeamcolumnjointreinforcedbyhybridgfrpandsteelbars |