Parametric Study of Flexural Strengthening of Concrete Beams with Prestressed Hybrid Reinforced Polymer
The strengthening method of using hybrid fiber reinforced polymer is an effective way to increase the strengthening efficiency and lower the cost. This paper focuses on simulating the flexural behavior of reinforced concrete beam strengthened by prestressed C/GFRP (Carbon-Glass hybrid Fiber Reinforc...
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doaj-40120721ab084253a9e711d7322521d62020-11-25T02:09:20ZengMDPI AGMaterials1996-19442019-11-011222379010.3390/ma12223790ma12223790Parametric Study of Flexural Strengthening of Concrete Beams with Prestressed Hybrid Reinforced PolymerXiaomeng Wang0Michal Petrů1Jun Ai2Shikun Ou3Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech RepublicInstitute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech RepublicCollege of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaCollege of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaThe strengthening method of using hybrid fiber reinforced polymer is an effective way to increase the strengthening efficiency and lower the cost. This paper focuses on simulating the flexural behavior of reinforced concrete beam strengthened by prestressed C/GFRP (Carbon-Glass hybrid Fiber Reinforced Polymer) with different hybrid ratios and prestress levels. An elastoplastic damage constitution is used to simulate the mechanical behavior of concrete. A cohesive zone model under mixed mode is adopted to describe the debonding behavior of the FRP-concrete and concrete-steel interface. The results show good agreement with the experiment in the load-deflection curve, load-stress curve of steel, and HFRP. Furthermore, the failure mode of concrete and FRP debonding obtained from numerical simulation is the same as the test. Considering the improvement of the bending capacity, stiffness, and ductility of the strengthened beam in this paper, the best hybrid ratio of carbon to glass fiber is 1:1, and the suitable prestress level is between 30 and 50% of its ultimate strength.https://www.mdpi.com/1996-1944/12/22/3790hybrid reinforced compositestrengtheningreinforced concrete beamsnumerical investigation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xiaomeng Wang Michal Petrů Jun Ai Shikun Ou |
spellingShingle |
Xiaomeng Wang Michal Petrů Jun Ai Shikun Ou Parametric Study of Flexural Strengthening of Concrete Beams with Prestressed Hybrid Reinforced Polymer Materials hybrid reinforced composite strengthening reinforced concrete beams numerical investigation |
author_facet |
Xiaomeng Wang Michal Petrů Jun Ai Shikun Ou |
author_sort |
Xiaomeng Wang |
title |
Parametric Study of Flexural Strengthening of Concrete Beams with Prestressed Hybrid Reinforced Polymer |
title_short |
Parametric Study of Flexural Strengthening of Concrete Beams with Prestressed Hybrid Reinforced Polymer |
title_full |
Parametric Study of Flexural Strengthening of Concrete Beams with Prestressed Hybrid Reinforced Polymer |
title_fullStr |
Parametric Study of Flexural Strengthening of Concrete Beams with Prestressed Hybrid Reinforced Polymer |
title_full_unstemmed |
Parametric Study of Flexural Strengthening of Concrete Beams with Prestressed Hybrid Reinforced Polymer |
title_sort |
parametric study of flexural strengthening of concrete beams with prestressed hybrid reinforced polymer |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2019-11-01 |
description |
The strengthening method of using hybrid fiber reinforced polymer is an effective way to increase the strengthening efficiency and lower the cost. This paper focuses on simulating the flexural behavior of reinforced concrete beam strengthened by prestressed C/GFRP (Carbon-Glass hybrid Fiber Reinforced Polymer) with different hybrid ratios and prestress levels. An elastoplastic damage constitution is used to simulate the mechanical behavior of concrete. A cohesive zone model under mixed mode is adopted to describe the debonding behavior of the FRP-concrete and concrete-steel interface. The results show good agreement with the experiment in the load-deflection curve, load-stress curve of steel, and HFRP. Furthermore, the failure mode of concrete and FRP debonding obtained from numerical simulation is the same as the test. Considering the improvement of the bending capacity, stiffness, and ductility of the strengthened beam in this paper, the best hybrid ratio of carbon to glass fiber is 1:1, and the suitable prestress level is between 30 and 50% of its ultimate strength. |
topic |
hybrid reinforced composite strengthening reinforced concrete beams numerical investigation |
url |
https://www.mdpi.com/1996-1944/12/22/3790 |
work_keys_str_mv |
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1724924510155571200 |