Structural Behavior of Large-Scale I-Beams with Combined Textile and CFRP Reinforcement
With the innovative composite material carbon-reinforced concrete, thin-walled, high-performance components can be realized. A combination of carbon fiber reinforced polymer (CFRP) bars and non-metallic textile grids is advantageous as it exploits the full potential of the high-performance materials...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/13/4625 |
| _version_ | 1797563363828432896 |
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| author | Jan Bielak Maximilian Schmidt Josef Hegger Frank Jesse |
| author_facet | Jan Bielak Maximilian Schmidt Josef Hegger Frank Jesse |
| author_sort | Jan Bielak |
| collection | DOAJ |
| description | With the innovative composite material carbon-reinforced concrete, thin-walled, high-performance components can be realized. A combination of carbon fiber reinforced polymer (CFRP) bars and non-metallic textile grids is advantageous as it exploits the full potential of the high-performance materials to reduce dead loads, increases durability, and extends lifespan. For new components with such mixed reinforcement, applicable design concepts and engineering rules are necessary to accurately determine the structural and deformation behavior. To validate models and detailing rules previously developed, three large carbon reinforced concrete I-beams were designed and tested to failure with a realistic line load. CFRP bars served as principal bending reinforcement, whereas shear and flange reinforcement consisted of textile grids. Results showed that existing models for bending using variation of strain distribution as well as non-linear finite-element analysis predicted the flexural behavior of structural components with mixed reinforcement in ultimate limit state (ULS) appropriately. Yet, calculation of shear capacity requires further studies to determine textile reinforcement contribution and estimate reduction for concrete strength in reinforced compression struts. For serviceability limit state (SLS), three methods for determination of deflection delivered good results. In future, a rethinking is required with regard to the ductility and robustness of CFRP-reinforced concrete components. In this respect, pronounced cracking as well as the large ultimate strain and deflection compensate for the lacking yield capacity of the reinforcement. |
| first_indexed | 2024-03-10T18:41:35Z |
| format | Article |
| id | doaj.art-7a49c4a24a3d46958ef9360c9d614aac |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T18:41:35Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-7a49c4a24a3d46958ef9360c9d614aac2023-11-20T05:47:50ZengMDPI AGApplied Sciences2076-34172020-07-011013462510.3390/app10134625Structural Behavior of Large-Scale I-Beams with Combined Textile and CFRP ReinforcementJan Bielak0Maximilian Schmidt1Josef Hegger2Frank Jesse3Institute of Structural Concrete, RWTH Aachen University, 52074 Aachen, GermanyInstitute of Structural Concrete, RWTH Aachen University, 52074 Aachen, GermanyInstitute of Structural Concrete, RWTH Aachen University, 52074 Aachen, GermanyHentschke Bau GmbH, 02625 Bautzen, GermanyWith the innovative composite material carbon-reinforced concrete, thin-walled, high-performance components can be realized. A combination of carbon fiber reinforced polymer (CFRP) bars and non-metallic textile grids is advantageous as it exploits the full potential of the high-performance materials to reduce dead loads, increases durability, and extends lifespan. For new components with such mixed reinforcement, applicable design concepts and engineering rules are necessary to accurately determine the structural and deformation behavior. To validate models and detailing rules previously developed, three large carbon reinforced concrete I-beams were designed and tested to failure with a realistic line load. CFRP bars served as principal bending reinforcement, whereas shear and flange reinforcement consisted of textile grids. Results showed that existing models for bending using variation of strain distribution as well as non-linear finite-element analysis predicted the flexural behavior of structural components with mixed reinforcement in ultimate limit state (ULS) appropriately. Yet, calculation of shear capacity requires further studies to determine textile reinforcement contribution and estimate reduction for concrete strength in reinforced compression struts. For serviceability limit state (SLS), three methods for determination of deflection delivered good results. In future, a rethinking is required with regard to the ductility and robustness of CFRP-reinforced concrete components. In this respect, pronounced cracking as well as the large ultimate strain and deflection compensate for the lacking yield capacity of the reinforcement.https://www.mdpi.com/2076-3417/10/13/4625textile-reinforced concretecarbon reinforced concretecontinuous loadfinite-element calculation |
| spellingShingle | Jan Bielak Maximilian Schmidt Josef Hegger Frank Jesse Structural Behavior of Large-Scale I-Beams with Combined Textile and CFRP Reinforcement Applied Sciences textile-reinforced concrete carbon reinforced concrete continuous load finite-element calculation |
| title | Structural Behavior of Large-Scale I-Beams with Combined Textile and CFRP Reinforcement |
| title_full | Structural Behavior of Large-Scale I-Beams with Combined Textile and CFRP Reinforcement |
| title_fullStr | Structural Behavior of Large-Scale I-Beams with Combined Textile and CFRP Reinforcement |
| title_full_unstemmed | Structural Behavior of Large-Scale I-Beams with Combined Textile and CFRP Reinforcement |
| title_short | Structural Behavior of Large-Scale I-Beams with Combined Textile and CFRP Reinforcement |
| title_sort | structural behavior of large scale i beams with combined textile and cfrp reinforcement |
| topic | textile-reinforced concrete carbon reinforced concrete continuous load finite-element calculation |
| url | https://www.mdpi.com/2076-3417/10/13/4625 |
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