Capacity Spectrum-Based Retrofitting Method and Quick Design for Viscously Damped Structures by Utilizing the Concept of Uniform Damping Ratio
Viscous dampers have proven to be effective in enhancing the seismic performance of existing structures. Despite this, there is still a need for rapid and simplified design methods and formulae for viscous dampers that can take into account the elastic–plastic performance of structures. This study i...
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| Format: | Article |
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MDPI AG
2023-07-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/7/1812 |
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| author | Xiuyan Hu Zhipeng Zhao Ruifu Zhang Zhaohui Lu Ming Guo Liang Guo |
| author_facet | Xiuyan Hu Zhipeng Zhao Ruifu Zhang Zhaohui Lu Ming Guo Liang Guo |
| author_sort | Xiuyan Hu |
| collection | DOAJ |
| description | Viscous dampers have proven to be effective in enhancing the seismic performance of existing structures. Despite this, there is still a need for rapid and simplified design methods and formulae for viscous dampers that can take into account the elastic–plastic performance of structures. This study introduces a retrofit design method for existing structures using viscous dampers, based on the concept of uniform damping ratio (UDR), with the aim of fully utilizing each damper. The UDR concept assumes that each damper in the structure provides the same UDR when subjected to seismic excitations of identical intensity. In this method, the first step involves defining the equivalent damping ratio (EDR) of the damper. Then, based on the capacity spectrum of the structure, the response mitigation ratio can be determined, which helps to determine the additional EDR required from the dampers. Once the UDR and additional EDR from the viscous damper have been determined, the parameters of the dampers at each story can be rapidly obtained. To demonstrate the effectiveness of this method, a six-story reinforced concrete frame was utilized as a benchmark structure. A comparison between this UDR-based approach and a traditional design approach was also conducted. The study findings reveal that the UDR concept enables the maximum utilization of energy dissipation capacity of viscous dampers installed in the structure, leading to a more effective and economical design approach. |
| first_indexed | 2024-03-11T01:13:29Z |
| format | Article |
| id | doaj.art-48dd417d7dc64bdf9dc52cceb3e65255 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T01:13:29Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-48dd417d7dc64bdf9dc52cceb3e652552023-11-18T18:39:18ZengMDPI AGBuildings2075-53092023-07-01137181210.3390/buildings13071812Capacity Spectrum-Based Retrofitting Method and Quick Design for Viscously Damped Structures by Utilizing the Concept of Uniform Damping RatioXiuyan Hu0Zhipeng Zhao1Ruifu Zhang2Zhaohui Lu3Ming Guo4Liang Guo5Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, ChinaKey Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, ChinaKey Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, ChinaDivision of Building Engineering, Changqing Engineering Design Com, Co., Ltd., Xi’an 721000, ChinaDivision of Building Engineering, Changqing Engineering Design Com, Co., Ltd., Xi’an 721000, ChinaDivision of Building Engineering, Changqing Engineering Design Com, Co., Ltd., Xi’an 721000, ChinaViscous dampers have proven to be effective in enhancing the seismic performance of existing structures. Despite this, there is still a need for rapid and simplified design methods and formulae for viscous dampers that can take into account the elastic–plastic performance of structures. This study introduces a retrofit design method for existing structures using viscous dampers, based on the concept of uniform damping ratio (UDR), with the aim of fully utilizing each damper. The UDR concept assumes that each damper in the structure provides the same UDR when subjected to seismic excitations of identical intensity. In this method, the first step involves defining the equivalent damping ratio (EDR) of the damper. Then, based on the capacity spectrum of the structure, the response mitigation ratio can be determined, which helps to determine the additional EDR required from the dampers. Once the UDR and additional EDR from the viscous damper have been determined, the parameters of the dampers at each story can be rapidly obtained. To demonstrate the effectiveness of this method, a six-story reinforced concrete frame was utilized as a benchmark structure. A comparison between this UDR-based approach and a traditional design approach was also conducted. The study findings reveal that the UDR concept enables the maximum utilization of energy dissipation capacity of viscous dampers installed in the structure, leading to a more effective and economical design approach.https://www.mdpi.com/2075-5309/13/7/1812uniform damping ratiocapacity spectrumenergy dissipationviscous damperretrofit design method |
| spellingShingle | Xiuyan Hu Zhipeng Zhao Ruifu Zhang Zhaohui Lu Ming Guo Liang Guo Capacity Spectrum-Based Retrofitting Method and Quick Design for Viscously Damped Structures by Utilizing the Concept of Uniform Damping Ratio Buildings uniform damping ratio capacity spectrum energy dissipation viscous damper retrofit design method |
| title | Capacity Spectrum-Based Retrofitting Method and Quick Design for Viscously Damped Structures by Utilizing the Concept of Uniform Damping Ratio |
| title_full | Capacity Spectrum-Based Retrofitting Method and Quick Design for Viscously Damped Structures by Utilizing the Concept of Uniform Damping Ratio |
| title_fullStr | Capacity Spectrum-Based Retrofitting Method and Quick Design for Viscously Damped Structures by Utilizing the Concept of Uniform Damping Ratio |
| title_full_unstemmed | Capacity Spectrum-Based Retrofitting Method and Quick Design for Viscously Damped Structures by Utilizing the Concept of Uniform Damping Ratio |
| title_short | Capacity Spectrum-Based Retrofitting Method and Quick Design for Viscously Damped Structures by Utilizing the Concept of Uniform Damping Ratio |
| title_sort | capacity spectrum based retrofitting method and quick design for viscously damped structures by utilizing the concept of uniform damping ratio |
| topic | uniform damping ratio capacity spectrum energy dissipation viscous damper retrofit design method |
| url | https://www.mdpi.com/2075-5309/13/7/1812 |
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