Experimental Study on Seismic Performance of CFRP-Strengthened Recycled Concrete Columns with Different Levels of Seismic Damage
To study the strengthening effect of carbon fiber composite materials (CFRP) on recycled concrete columns subjected to different levels of seismic damage, four column specimens were designed for pseudo-static tests. The four specimens were categorized as non-destructive without strengthening (protot...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/6/1470 |
| _version_ | 1797595693690388480 |
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| author | Shuai Song Zhen Tian Zhenyu Zhao Xi Li Jianfeng Zhao Baishun Xu |
| author_facet | Shuai Song Zhen Tian Zhenyu Zhao Xi Li Jianfeng Zhao Baishun Xu |
| author_sort | Shuai Song |
| collection | DOAJ |
| description | To study the strengthening effect of carbon fiber composite materials (CFRP) on recycled concrete columns subjected to different levels of seismic damage, four column specimens were designed for pseudo-static tests. The four specimens were categorized as non-destructive without strengthening (prototype), non-destructive strengthening, medium seismic damage strengthening, and severe seismic damage strengthening based on the replacement rate of recycled aggregates and the level of seismic damage. The characteristics of the deformation damage and seismic performance indicators of each specimen were compared and analyzed. The results were verified on the OpenSees platform. A decrease was observed in the initial stiffness of the seismically damaged recycled concrete column specimens strengthened with CFRP, while the ductility, peak bearing capacity, and energy dissipation capacity of the specimens were improved. In addition, with the reduction in seismic damage, the ductility and energy dissipation capacity of the strengthened seismically damaged recycled concrete column specimens were enhanced to different degrees. In particular, the cumulative energy dissipation of the strengthened specimens exposed to medium seismic damage increased most significantly, by 32.5%. In general, the hysteretic curves of the strengthened specimens were full, and the average ductility coefficients were 4.1–6.8. CFRP strengthening was more effective for restoring and enhancing the performance of the recycled concrete column specimens with medium and lower seismic damage levels (displacement ratio ≤ 3%). |
| first_indexed | 2024-03-11T02:39:58Z |
| format | Article |
| id | doaj.art-a16adff70af741c5b459ec0d8ff93a49 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T02:39:58Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-a16adff70af741c5b459ec0d8ff93a492023-11-18T09:38:45ZengMDPI AGBuildings2075-53092023-06-01136147010.3390/buildings13061470Experimental Study on Seismic Performance of CFRP-Strengthened Recycled Concrete Columns with Different Levels of Seismic DamageShuai Song0Zhen Tian1Zhenyu Zhao2Xi Li3Jianfeng Zhao4Baishun Xu5School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266520, ChinaDepartment of Architectural Engineering, Suqian University, Suqian 223800, ChinaTo study the strengthening effect of carbon fiber composite materials (CFRP) on recycled concrete columns subjected to different levels of seismic damage, four column specimens were designed for pseudo-static tests. The four specimens were categorized as non-destructive without strengthening (prototype), non-destructive strengthening, medium seismic damage strengthening, and severe seismic damage strengthening based on the replacement rate of recycled aggregates and the level of seismic damage. The characteristics of the deformation damage and seismic performance indicators of each specimen were compared and analyzed. The results were verified on the OpenSees platform. A decrease was observed in the initial stiffness of the seismically damaged recycled concrete column specimens strengthened with CFRP, while the ductility, peak bearing capacity, and energy dissipation capacity of the specimens were improved. In addition, with the reduction in seismic damage, the ductility and energy dissipation capacity of the strengthened seismically damaged recycled concrete column specimens were enhanced to different degrees. In particular, the cumulative energy dissipation of the strengthened specimens exposed to medium seismic damage increased most significantly, by 32.5%. In general, the hysteretic curves of the strengthened specimens were full, and the average ductility coefficients were 4.1–6.8. CFRP strengthening was more effective for restoring and enhancing the performance of the recycled concrete column specimens with medium and lower seismic damage levels (displacement ratio ≤ 3%).https://www.mdpi.com/2075-5309/13/6/1470carbon fiber compositesrecycled concreterecycled aggregate replacement ratelevels of seismic damagepseudo-static test |
| spellingShingle | Shuai Song Zhen Tian Zhenyu Zhao Xi Li Jianfeng Zhao Baishun Xu Experimental Study on Seismic Performance of CFRP-Strengthened Recycled Concrete Columns with Different Levels of Seismic Damage Buildings carbon fiber composites recycled concrete recycled aggregate replacement rate levels of seismic damage pseudo-static test |
| title | Experimental Study on Seismic Performance of CFRP-Strengthened Recycled Concrete Columns with Different Levels of Seismic Damage |
| title_full | Experimental Study on Seismic Performance of CFRP-Strengthened Recycled Concrete Columns with Different Levels of Seismic Damage |
| title_fullStr | Experimental Study on Seismic Performance of CFRP-Strengthened Recycled Concrete Columns with Different Levels of Seismic Damage |
| title_full_unstemmed | Experimental Study on Seismic Performance of CFRP-Strengthened Recycled Concrete Columns with Different Levels of Seismic Damage |
| title_short | Experimental Study on Seismic Performance of CFRP-Strengthened Recycled Concrete Columns with Different Levels of Seismic Damage |
| title_sort | experimental study on seismic performance of cfrp strengthened recycled concrete columns with different levels of seismic damage |
| topic | carbon fiber composites recycled concrete recycled aggregate replacement rate levels of seismic damage pseudo-static test |
| url | https://www.mdpi.com/2075-5309/13/6/1470 |
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