A Fast Fragility Analysis Method for Seismically Isolated RC Structures
This paper presents an advanced seismic performance evaluation of reinforced concrete (RC) seismically isolated frame structures under the conditions of rare earthquakes. By employing an elastic–plastic analysis in conjunction with a nonlinear multi-degree-of-freedom model, this study innovatively a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-07-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/15/14/2449 |
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| author | Cholap Chong Mufeng Chen Mingming Wang Lushun Wei |
| author_facet | Cholap Chong Mufeng Chen Mingming Wang Lushun Wei |
| author_sort | Cholap Chong |
| collection | DOAJ |
| description | This paper presents an advanced seismic performance evaluation of reinforced concrete (RC) seismically isolated frame structures under the conditions of rare earthquakes. By employing an elastic–plastic analysis in conjunction with a nonlinear multi-degree-of-freedom model, this study innovatively assesses the incremental dynamic vulnerability of isolated structures. A novel equivalent linearization method is introduced for both single- and two-degree-of-freedom isolation structures, providing a simplified yet accurate means of predicting seismic responses. The reliability of the modified Takeda hysteretic model is verified through comparative analysis with experimental data, providing a solid foundation for the research. Furthermore, a multi-degree-of-freedom shear model is employed for rapid elastic–plastic analysis, validated against finite element software, resulting in an impressive 85% reduction in computation time while maintaining high accuracy. The fragility analysis reveals the staggered upward trend in the vulnerability of the upper structure and isolation layer, highlighting the importance of comprehensive damage control to enhance overall seismic performance. |
| format | Article |
| id | doaj-art-3ac0d41ce21b434a8a19fe8c6ade689c |
| institution | DOAJ |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj-art-3ac0d41ce21b434a8a19fe8c6ade689c2025-08-20T03:07:54ZengMDPI AGBuildings2075-53092025-07-011514244910.3390/buildings15142449A Fast Fragility Analysis Method for Seismically Isolated RC StructuresCholap Chong0Mufeng Chen1Mingming Wang2Lushun Wei3School of Civil Engineering and Transportation, Foshan University, Foshan 528225, ChinaCollege of Construction and Ecology, Shantou Polytechnic, Shantou 515078, ChinaGuangdong Provincial Academy of Building Research Group Co., Ltd., Guangzhou 510599, ChinaSchool of Civil Engineering and Transportation, Foshan University, Foshan 528225, ChinaThis paper presents an advanced seismic performance evaluation of reinforced concrete (RC) seismically isolated frame structures under the conditions of rare earthquakes. By employing an elastic–plastic analysis in conjunction with a nonlinear multi-degree-of-freedom model, this study innovatively assesses the incremental dynamic vulnerability of isolated structures. A novel equivalent linearization method is introduced for both single- and two-degree-of-freedom isolation structures, providing a simplified yet accurate means of predicting seismic responses. The reliability of the modified Takeda hysteretic model is verified through comparative analysis with experimental data, providing a solid foundation for the research. Furthermore, a multi-degree-of-freedom shear model is employed for rapid elastic–plastic analysis, validated against finite element software, resulting in an impressive 85% reduction in computation time while maintaining high accuracy. The fragility analysis reveals the staggered upward trend in the vulnerability of the upper structure and isolation layer, highlighting the importance of comprehensive damage control to enhance overall seismic performance.https://www.mdpi.com/2075-5309/15/14/2449fragility analysisRC structuresbase isolationequivalent linearizationmulti-degree-of-freedom model |
| spellingShingle | Cholap Chong Mufeng Chen Mingming Wang Lushun Wei A Fast Fragility Analysis Method for Seismically Isolated RC Structures Buildings fragility analysis RC structures base isolation equivalent linearization multi-degree-of-freedom model |
| title | A Fast Fragility Analysis Method for Seismically Isolated RC Structures |
| title_full | A Fast Fragility Analysis Method for Seismically Isolated RC Structures |
| title_fullStr | A Fast Fragility Analysis Method for Seismically Isolated RC Structures |
| title_full_unstemmed | A Fast Fragility Analysis Method for Seismically Isolated RC Structures |
| title_short | A Fast Fragility Analysis Method for Seismically Isolated RC Structures |
| title_sort | fast fragility analysis method for seismically isolated rc structures |
| topic | fragility analysis RC structures base isolation equivalent linearization multi-degree-of-freedom model |
| url | https://www.mdpi.com/2075-5309/15/14/2449 |
| work_keys_str_mv | AT cholapchong afastfragilityanalysismethodforseismicallyisolatedrcstructures AT mufengchen afastfragilityanalysismethodforseismicallyisolatedrcstructures AT mingmingwang afastfragilityanalysismethodforseismicallyisolatedrcstructures AT lushunwei afastfragilityanalysismethodforseismicallyisolatedrcstructures AT cholapchong fastfragilityanalysismethodforseismicallyisolatedrcstructures AT mufengchen fastfragilityanalysismethodforseismicallyisolatedrcstructures AT mingmingwang fastfragilityanalysismethodforseismicallyisolatedrcstructures AT lushunwei fastfragilityanalysismethodforseismicallyisolatedrcstructures |