Effects of Internal Force Redistribution on the Limit States of Continuous Beams with GFRP Reinforcement
Fiber-reinforced polymers (FRP) are commonly used as internal reinforcement in RC structures in aggressive environments. The design of concrete elements reinforced with FRP bars is usually ruled by serviceability criteria rather than the ultimate limit state. Six continuous concrete beams over two s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/11/3973 |
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| author | Nikola Baša Nataša Kopitović Vuković Mladen Ulićević Mladen Muhadinović |
| author_facet | Nikola Baša Nataša Kopitović Vuković Mladen Ulićević Mladen Muhadinović |
| author_sort | Nikola Baša |
| collection | DOAJ |
| description | Fiber-reinforced polymers (FRP) are commonly used as internal reinforcement in RC structures in aggressive environments. The design of concrete elements reinforced with FRP bars is usually ruled by serviceability criteria rather than the ultimate limit state. Six continuous concrete beams over two spans with longitudinal and transverse glass FRP (GFRP) reinforcement were investigated until failure to estimate the effects of different reinforcement arrangements on the limit states of continuous beams. The ratio of longitudinal reinforcement between the midspan and middle support sections (i.e., the design moment redistribution) and the type of GFRP reinforcement were the main parameters. The experimental results were compared to prediction models and other code formulations under serviceability and ultimate limit states. The bond-dependent coefficient <i>k<sub>b</sub></i> was investigated to assess adhesion conditions for GFRP reinforcement and concrete. The results showed that moment redistribution in continuous beams with GFRP reinforcement happens with slippage between the reinforcement and concrete in the middle support without the load capacity being reduced. A modified model was suggested for better deflection prediction of continuous beams reinforced with GFRP bars. Based on deformability factors, the tested continuous beams, although containing GFRP reinforcement that has brittle behavior, showed a certain kind of ductile behavior. |
| first_indexed | 2024-03-10T19:18:23Z |
| format | Article |
| id | doaj.art-dc199cd850904f3882fd6082951d1f6c |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T19:18:23Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-dc199cd850904f3882fd6082951d1f6c2023-11-20T03:11:11ZengMDPI AGApplied Sciences2076-34172020-06-011011397310.3390/app10113973Effects of Internal Force Redistribution on the Limit States of Continuous Beams with GFRP ReinforcementNikola Baša0Nataša Kopitović Vuković1Mladen Ulićević2Mladen Muhadinović3Faculty of Civil Engineering, University of Montenegro, Cetinjski put bb, 81000 Podgorica, MontenegroFaculty of Civil Engineering, University of Montenegro, Cetinjski put bb, 81000 Podgorica, MontenegroFaculty of Civil Engineering, University of Montenegro, Cetinjski put bb, 81000 Podgorica, MontenegroFaculty of Civil Engineering, University of Montenegro, Cetinjski put bb, 81000 Podgorica, MontenegroFiber-reinforced polymers (FRP) are commonly used as internal reinforcement in RC structures in aggressive environments. The design of concrete elements reinforced with FRP bars is usually ruled by serviceability criteria rather than the ultimate limit state. Six continuous concrete beams over two spans with longitudinal and transverse glass FRP (GFRP) reinforcement were investigated until failure to estimate the effects of different reinforcement arrangements on the limit states of continuous beams. The ratio of longitudinal reinforcement between the midspan and middle support sections (i.e., the design moment redistribution) and the type of GFRP reinforcement were the main parameters. The experimental results were compared to prediction models and other code formulations under serviceability and ultimate limit states. The bond-dependent coefficient <i>k<sub>b</sub></i> was investigated to assess adhesion conditions for GFRP reinforcement and concrete. The results showed that moment redistribution in continuous beams with GFRP reinforcement happens with slippage between the reinforcement and concrete in the middle support without the load capacity being reduced. A modified model was suggested for better deflection prediction of continuous beams reinforced with GFRP bars. Based on deformability factors, the tested continuous beams, although containing GFRP reinforcement that has brittle behavior, showed a certain kind of ductile behavior.https://www.mdpi.com/2076-3417/10/11/3973GFRP barscontinuous beamsmoment redistributionserviceabilitycracksdeflection |
| spellingShingle | Nikola Baša Nataša Kopitović Vuković Mladen Ulićević Mladen Muhadinović Effects of Internal Force Redistribution on the Limit States of Continuous Beams with GFRP Reinforcement Applied Sciences GFRP bars continuous beams moment redistribution serviceability cracks deflection |
| title | Effects of Internal Force Redistribution on the Limit States of Continuous Beams with GFRP Reinforcement |
| title_full | Effects of Internal Force Redistribution on the Limit States of Continuous Beams with GFRP Reinforcement |
| title_fullStr | Effects of Internal Force Redistribution on the Limit States of Continuous Beams with GFRP Reinforcement |
| title_full_unstemmed | Effects of Internal Force Redistribution on the Limit States of Continuous Beams with GFRP Reinforcement |
| title_short | Effects of Internal Force Redistribution on the Limit States of Continuous Beams with GFRP Reinforcement |
| title_sort | effects of internal force redistribution on the limit states of continuous beams with gfrp reinforcement |
| topic | GFRP bars continuous beams moment redistribution serviceability cracks deflection |
| url | https://www.mdpi.com/2076-3417/10/11/3973 |
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