Numerical Study of RC Beams Strengthened with Fe-Based Shape Memory Alloy Strips Using the NSM Method
This paper presents a finite element (FE) analysis for predicting the flexural behavior of reinforced concrete (RC) beams strengthened with Fe-based shape memory alloy (Fe-SMA) strips using a near surface mounted (NSM) method. Experimental results reported in the literature were used to verify the p...
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MDPI AG
2021-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/15/6809 |
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| author | Yeong-Mo Yeon Ki-Nam Hong Sugyu Lee Sang-Won Ji |
| author_facet | Yeong-Mo Yeon Ki-Nam Hong Sugyu Lee Sang-Won Ji |
| author_sort | Yeong-Mo Yeon |
| collection | DOAJ |
| description | This paper presents a finite element (FE) analysis for predicting the flexural behavior of reinforced concrete (RC) beams strengthened with Fe-based shape memory alloy (Fe-SMA) strips using a near surface mounted (NSM) method. Experimental results reported in the literature were used to verify the proposed FE model. FE analyses were conducted using OpenSees, a general-purpose structural FE analysis program. The RC beam specimens were modeled using a nonlinear beam-column element and a fiber element. The Concrete 02 model, Steel 01 model, and Pinching 04 model were applied to the concrete, steel reinforcement, and Fe-SMA strip in the fiber element, respectively, and the FE analysis was carried out in a displacement control method based on the Newton-Raphson method. The FE model of this study accurately predicted the initial crack load, yield load, and ultimate load. From parametric analyses, it was concluded that an increase in the compressive strength of the concrete increases the ductility of the specimen, and an increase in the level of recovery stress on the Fe-SMA strip increases the initial stiffness of the specimen. |
| first_indexed | 2024-03-10T09:19:05Z |
| format | Article |
| id | doaj.art-abc074979b2d47f491a13aa07e8ff49d |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T09:19:05Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-abc074979b2d47f491a13aa07e8ff49d2023-11-22T05:19:53ZengMDPI AGApplied Sciences2076-34172021-07-011115680910.3390/app11156809Numerical Study of RC Beams Strengthened with Fe-Based Shape Memory Alloy Strips Using the NSM MethodYeong-Mo Yeon0Ki-Nam Hong1Sugyu Lee2Sang-Won Ji3Department of Civil Engineering, Chungbuk National University, Chungbuk 28644, KoreaDepartment of Civil Engineering, Chungbuk National University, Chungbuk 28644, KoreaLand and Housing Institute, Daejeon 34047, KoreaDepartment of Civil Engineering, Chungbuk National University, Chungbuk 28644, KoreaThis paper presents a finite element (FE) analysis for predicting the flexural behavior of reinforced concrete (RC) beams strengthened with Fe-based shape memory alloy (Fe-SMA) strips using a near surface mounted (NSM) method. Experimental results reported in the literature were used to verify the proposed FE model. FE analyses were conducted using OpenSees, a general-purpose structural FE analysis program. The RC beam specimens were modeled using a nonlinear beam-column element and a fiber element. The Concrete 02 model, Steel 01 model, and Pinching 04 model were applied to the concrete, steel reinforcement, and Fe-SMA strip in the fiber element, respectively, and the FE analysis was carried out in a displacement control method based on the Newton-Raphson method. The FE model of this study accurately predicted the initial crack load, yield load, and ultimate load. From parametric analyses, it was concluded that an increase in the compressive strength of the concrete increases the ductility of the specimen, and an increase in the level of recovery stress on the Fe-SMA strip increases the initial stiffness of the specimen.https://www.mdpi.com/2076-3417/11/15/6809Fe-based shape memory alloy (Fe-SMA)recovery stressnear surface mounted (NSM) |
| spellingShingle | Yeong-Mo Yeon Ki-Nam Hong Sugyu Lee Sang-Won Ji Numerical Study of RC Beams Strengthened with Fe-Based Shape Memory Alloy Strips Using the NSM Method Applied Sciences Fe-based shape memory alloy (Fe-SMA) recovery stress near surface mounted (NSM) |
| title | Numerical Study of RC Beams Strengthened with Fe-Based Shape Memory Alloy Strips Using the NSM Method |
| title_full | Numerical Study of RC Beams Strengthened with Fe-Based Shape Memory Alloy Strips Using the NSM Method |
| title_fullStr | Numerical Study of RC Beams Strengthened with Fe-Based Shape Memory Alloy Strips Using the NSM Method |
| title_full_unstemmed | Numerical Study of RC Beams Strengthened with Fe-Based Shape Memory Alloy Strips Using the NSM Method |
| title_short | Numerical Study of RC Beams Strengthened with Fe-Based Shape Memory Alloy Strips Using the NSM Method |
| title_sort | numerical study of rc beams strengthened with fe based shape memory alloy strips using the nsm method |
| topic | Fe-based shape memory alloy (Fe-SMA) recovery stress near surface mounted (NSM) |
| url | https://www.mdpi.com/2076-3417/11/15/6809 |
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