Shear Performance of RC Beams Reinforced with Fe-Based Shape Memory Alloy Stirrups
In this study, the shear performance of a reinforced concrete (RC) beam with Fe-based shape memory alloy (Fe-SMA) stirrups was evaluated experimentally and analytically. Five specimens that had a possibility of shear failure under four-point loading were prepared. The major experimental variables we...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-02-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/5/1703 |
| _version_ | 1797474681186418688 |
|---|---|
| author | Sang-Won Ji Yeong-Mo Yeon Ki-Nam Hong |
| author_facet | Sang-Won Ji Yeong-Mo Yeon Ki-Nam Hong |
| author_sort | Sang-Won Ji |
| collection | DOAJ |
| description | In this study, the shear performance of a reinforced concrete (RC) beam with Fe-based shape memory alloy (Fe-SMA) stirrups was evaluated experimentally and analytically. Five specimens that had a possibility of shear failure under four-point loading were prepared. The major experimental variables were the spacings (300 and 200 mm) between the Fe-SMA stirrups and whether the stirrups were activated or non-activated. The shear strength of the specimen reinforced with the Fe-SMA stirrups at a spacing of 200 mm was 27.1% higher than that of the specimen reinforced at a spacing of 300 mm. The activation of the Fe-SMA stirrups, which produced active confining pressure, increased the shear strength by up to 7.6% and decreased the number of shear cracks compared to the case of the non-activated specimen. Therefore, the use of Fe-SMA stirrups could significantly improve the usability of concrete members by increasing their shear strength and initial stiffness and by controlling crack formation. Furthermore, finite element method (FEM) analysis was conducted using LS-DYNA, a commercial software program, to predict the shear performance of the RC beam reinforced with the Fe-SMA stirrups. The ultimate load and displacement of each specimen were predicted with errors less than 1.4 and 9.4%, respectively. Furthermore, the FEM predicted the change in failure mode and the stiffness improvement due to the activation of the Fe-SMA stirrups. Therefore, the proposed finite element analysis model can effectively predict the behavior of an RC beam reinforced with Fe-SMA stirrups. |
| first_indexed | 2024-03-09T20:33:36Z |
| format | Article |
| id | doaj.art-ff63682bebc449debe7689652cd39f95 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T20:33:36Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-ff63682bebc449debe7689652cd39f952023-11-23T23:17:33ZengMDPI AGMaterials1996-19442022-02-01155170310.3390/ma15051703Shear Performance of RC Beams Reinforced with Fe-Based Shape Memory Alloy StirrupsSang-Won Ji0Yeong-Mo Yeon1Ki-Nam Hong2Department of Civil Engineering, Chungbuk National University, Cheongju 28644, KoreaDepartment of Civil Engineering, Chungbuk National University, Cheongju 28644, KoreaDepartment of Civil Engineering, Chungbuk National University, Cheongju 28644, KoreaIn this study, the shear performance of a reinforced concrete (RC) beam with Fe-based shape memory alloy (Fe-SMA) stirrups was evaluated experimentally and analytically. Five specimens that had a possibility of shear failure under four-point loading were prepared. The major experimental variables were the spacings (300 and 200 mm) between the Fe-SMA stirrups and whether the stirrups were activated or non-activated. The shear strength of the specimen reinforced with the Fe-SMA stirrups at a spacing of 200 mm was 27.1% higher than that of the specimen reinforced at a spacing of 300 mm. The activation of the Fe-SMA stirrups, which produced active confining pressure, increased the shear strength by up to 7.6% and decreased the number of shear cracks compared to the case of the non-activated specimen. Therefore, the use of Fe-SMA stirrups could significantly improve the usability of concrete members by increasing their shear strength and initial stiffness and by controlling crack formation. Furthermore, finite element method (FEM) analysis was conducted using LS-DYNA, a commercial software program, to predict the shear performance of the RC beam reinforced with the Fe-SMA stirrups. The ultimate load and displacement of each specimen were predicted with errors less than 1.4 and 9.4%, respectively. Furthermore, the FEM predicted the change in failure mode and the stiffness improvement due to the activation of the Fe-SMA stirrups. Therefore, the proposed finite element analysis model can effectively predict the behavior of an RC beam reinforced with Fe-SMA stirrups.https://www.mdpi.com/1996-1944/15/5/1703Fe-SMAactive confiningshear performance |
| spellingShingle | Sang-Won Ji Yeong-Mo Yeon Ki-Nam Hong Shear Performance of RC Beams Reinforced with Fe-Based Shape Memory Alloy Stirrups Materials Fe-SMA active confining shear performance |
| title | Shear Performance of RC Beams Reinforced with Fe-Based Shape Memory Alloy Stirrups |
| title_full | Shear Performance of RC Beams Reinforced with Fe-Based Shape Memory Alloy Stirrups |
| title_fullStr | Shear Performance of RC Beams Reinforced with Fe-Based Shape Memory Alloy Stirrups |
| title_full_unstemmed | Shear Performance of RC Beams Reinforced with Fe-Based Shape Memory Alloy Stirrups |
| title_short | Shear Performance of RC Beams Reinforced with Fe-Based Shape Memory Alloy Stirrups |
| title_sort | shear performance of rc beams reinforced with fe based shape memory alloy stirrups |
| topic | Fe-SMA active confining shear performance |
| url | https://www.mdpi.com/1996-1944/15/5/1703 |
| work_keys_str_mv | AT sangwonji shearperformanceofrcbeamsreinforcedwithfebasedshapememoryalloystirrups AT yeongmoyeon shearperformanceofrcbeamsreinforcedwithfebasedshapememoryalloystirrups AT kinamhong shearperformanceofrcbeamsreinforcedwithfebasedshapememoryalloystirrups |