Seismic Behavior of Resilient Reinforced Concrete Columns with Ultra-High-Strength Rebars Under Strong Earthquake-Induced Multiple Reversed Cyclic Loading
The frequent occurrence of major earthquakes highlights the structural challenges posed by long-period ground motions (LPGMs). This study investigates the seismic performance and resilience of five reinforced concrete (RC) columns with different high-strength steel bars under LPGM-induced cyclic loa...
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MDPI AG
2024-11-01
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| Online Access: | https://www.mdpi.com/2075-5309/14/12/3747 |
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| author | Yue Wen Gaochuang Cai Prafulla Bahadur Malla Hayato Kikuchi Cheng Xie |
| author_facet | Yue Wen Gaochuang Cai Prafulla Bahadur Malla Hayato Kikuchi Cheng Xie |
| author_sort | Yue Wen |
| collection | DOAJ |
| description | The frequent occurrence of major earthquakes highlights the structural challenges posed by long-period ground motions (LPGMs). This study investigates the seismic performance and resilience of five reinforced concrete (RC) columns with different high-strength steel bars under LPGM-induced cyclic loading, both experimentally and numerically. The results show that low-bond and debonded high-strength steel bars significantly enhance self-centering capabilities and reduce residual drift, with lateral force reductions of 7.6% for normal cyclic loading and 19.2% for multiple reversed cyclic loading. The concrete damage in the hinge zone of the columns was increased; however, the significant inside damage of the concrete near the steel bars made it easier to restore the columns for the damage accumulation caused by multiple loading. Based on the experiment, a numerical model was developed for the columns, and a simplified model was proposed to predict energy dissipation capacity, providing practical design methods for resilient RC structures that may be attacked by LPGMs. |
| format | Article |
| id | doaj-art-099e8751cd3a4455afa27e7fb8d48ebc |
| institution | DOAJ |
| issn | 2075-5309 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj-art-099e8751cd3a4455afa27e7fb8d48ebc2025-08-20T02:50:56ZengMDPI AGBuildings2075-53092024-11-011412374710.3390/buildings14123747Seismic Behavior of Resilient Reinforced Concrete Columns with Ultra-High-Strength Rebars Under Strong Earthquake-Induced Multiple Reversed Cyclic LoadingYue Wen0Gaochuang Cai1Prafulla Bahadur Malla2Hayato Kikuchi3Cheng Xie4Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, JapanInternational Research Organization for Advanced Science & Technology, Kumamoto University, Kumamoto 860-8555, JapanInternational Research Organization for Advanced Science & Technology, Kumamoto University, Kumamoto 860-8555, JapanGraduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, JapanGraduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, JapanThe frequent occurrence of major earthquakes highlights the structural challenges posed by long-period ground motions (LPGMs). This study investigates the seismic performance and resilience of five reinforced concrete (RC) columns with different high-strength steel bars under LPGM-induced cyclic loading, both experimentally and numerically. The results show that low-bond and debonded high-strength steel bars significantly enhance self-centering capabilities and reduce residual drift, with lateral force reductions of 7.6% for normal cyclic loading and 19.2% for multiple reversed cyclic loading. The concrete damage in the hinge zone of the columns was increased; however, the significant inside damage of the concrete near the steel bars made it easier to restore the columns for the damage accumulation caused by multiple loading. Based on the experiment, a numerical model was developed for the columns, and a simplified model was proposed to predict energy dissipation capacity, providing practical design methods for resilient RC structures that may be attacked by LPGMs.https://www.mdpi.com/2075-5309/14/12/3747strong earthquakeslong-period ground motionperformance degradationhigh strength rebarsresilient reinforced concretepost-earthquake reparability |
| spellingShingle | Yue Wen Gaochuang Cai Prafulla Bahadur Malla Hayato Kikuchi Cheng Xie Seismic Behavior of Resilient Reinforced Concrete Columns with Ultra-High-Strength Rebars Under Strong Earthquake-Induced Multiple Reversed Cyclic Loading Buildings strong earthquakes long-period ground motion performance degradation high strength rebars resilient reinforced concrete post-earthquake reparability |
| title | Seismic Behavior of Resilient Reinforced Concrete Columns with Ultra-High-Strength Rebars Under Strong Earthquake-Induced Multiple Reversed Cyclic Loading |
| title_full | Seismic Behavior of Resilient Reinforced Concrete Columns with Ultra-High-Strength Rebars Under Strong Earthquake-Induced Multiple Reversed Cyclic Loading |
| title_fullStr | Seismic Behavior of Resilient Reinforced Concrete Columns with Ultra-High-Strength Rebars Under Strong Earthquake-Induced Multiple Reversed Cyclic Loading |
| title_full_unstemmed | Seismic Behavior of Resilient Reinforced Concrete Columns with Ultra-High-Strength Rebars Under Strong Earthquake-Induced Multiple Reversed Cyclic Loading |
| title_short | Seismic Behavior of Resilient Reinforced Concrete Columns with Ultra-High-Strength Rebars Under Strong Earthquake-Induced Multiple Reversed Cyclic Loading |
| title_sort | seismic behavior of resilient reinforced concrete columns with ultra high strength rebars under strong earthquake induced multiple reversed cyclic loading |
| topic | strong earthquakes long-period ground motion performance degradation high strength rebars resilient reinforced concrete post-earthquake reparability |
| url | https://www.mdpi.com/2075-5309/14/12/3747 |
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