Study on the influence of base shear distribution on the seismic response of base-isolated split-foundation structures
Split-foundation structures with base isolation have multiple isolation layers due to their uneven foundation heights. This complexity adds challenges to the seismic isolation design of split-foundation structures. In this paper, two special parameters, namely the shear non-uniformity factor Φ and t...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2025-05-01
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| Series: | Journal of Asian Architecture and Building Engineering |
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| Online Access: | http://dx.doi.org/10.1080/13467581.2024.2325464 |
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| _version_ | 1850137842012913664 |
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| author | Yangyang Tang Baolong Jiang Yingmin Li Shuyan Ji |
| author_facet | Yangyang Tang Baolong Jiang Yingmin Li Shuyan Ji |
| author_sort | Yangyang Tang |
| collection | DOAJ |
| description | Split-foundation structures with base isolation have multiple isolation layers due to their uneven foundation heights. This complexity adds challenges to the seismic isolation design of split-foundation structures. In this paper, two special parameters, namely the shear non-uniformity factor Φ and the ratio of shear non-uniformity factor Γ, were proposed. Response spectrum analysis and time history analysis on base-isolated split-foundation structures with varying Φ and Γ were conducted to investigate their seismic response and damping effect. The results indicate that Φ primarily affects the seismic response in the lower stories and the upper embedding story. When Φ is too small or too large, it results in an uneven isolation effect. Moreover, when the base shear ratio βz exceeds 0.5, the distribution of plastic hinges is significantly affected by the variations in Φ. Additionally, the story shear and story drift ratio of lower stories in the along-slope direction are generally greater than that of the corresponding story of the non-isolated structure. Therefore, in the seismic isolation design of the split-foundation structure, the base shear at different embedding ends should be reasonably assigned. Special attention should also be given to the adverse effects in the along-slope direction. |
| format | Article |
| id | doaj-art-532b558c7a01401da5dfd4a06e07e9c8 |
| institution | OA Journals |
| issn | 1347-2852 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Asian Architecture and Building Engineering |
| spelling | doaj-art-532b558c7a01401da5dfd4a06e07e9c82025-08-20T02:30:43ZengTaylor & Francis GroupJournal of Asian Architecture and Building Engineering1347-28522025-05-012431221123410.1080/13467581.2024.23254642325464Study on the influence of base shear distribution on the seismic response of base-isolated split-foundation structuresYangyang Tang0Baolong Jiang1Yingmin Li2Shuyan Ji3Chongqing UniversityChongqing UniversityChongqing UniversityChongqing UniversitySplit-foundation structures with base isolation have multiple isolation layers due to their uneven foundation heights. This complexity adds challenges to the seismic isolation design of split-foundation structures. In this paper, two special parameters, namely the shear non-uniformity factor Φ and the ratio of shear non-uniformity factor Γ, were proposed. Response spectrum analysis and time history analysis on base-isolated split-foundation structures with varying Φ and Γ were conducted to investigate their seismic response and damping effect. The results indicate that Φ primarily affects the seismic response in the lower stories and the upper embedding story. When Φ is too small or too large, it results in an uneven isolation effect. Moreover, when the base shear ratio βz exceeds 0.5, the distribution of plastic hinges is significantly affected by the variations in Φ. Additionally, the story shear and story drift ratio of lower stories in the along-slope direction are generally greater than that of the corresponding story of the non-isolated structure. Therefore, in the seismic isolation design of the split-foundation structure, the base shear at different embedding ends should be reasonably assigned. Special attention should also be given to the adverse effects in the along-slope direction.http://dx.doi.org/10.1080/13467581.2024.2325464base-isolationsplit-foundation structurebase shearseismic responsedamping effect |
| spellingShingle | Yangyang Tang Baolong Jiang Yingmin Li Shuyan Ji Study on the influence of base shear distribution on the seismic response of base-isolated split-foundation structures Journal of Asian Architecture and Building Engineering base-isolation split-foundation structure base shear seismic response damping effect |
| title | Study on the influence of base shear distribution on the seismic response of base-isolated split-foundation structures |
| title_full | Study on the influence of base shear distribution on the seismic response of base-isolated split-foundation structures |
| title_fullStr | Study on the influence of base shear distribution on the seismic response of base-isolated split-foundation structures |
| title_full_unstemmed | Study on the influence of base shear distribution on the seismic response of base-isolated split-foundation structures |
| title_short | Study on the influence of base shear distribution on the seismic response of base-isolated split-foundation structures |
| title_sort | study on the influence of base shear distribution on the seismic response of base isolated split foundation structures |
| topic | base-isolation split-foundation structure base shear seismic response damping effect |
| url | http://dx.doi.org/10.1080/13467581.2024.2325464 |
| work_keys_str_mv | AT yangyangtang studyontheinfluenceofbasesheardistributionontheseismicresponseofbaseisolatedsplitfoundationstructures AT baolongjiang studyontheinfluenceofbasesheardistributionontheseismicresponseofbaseisolatedsplitfoundationstructures AT yingminli studyontheinfluenceofbasesheardistributionontheseismicresponseofbaseisolatedsplitfoundationstructures AT shuyanji studyontheinfluenceofbasesheardistributionontheseismicresponseofbaseisolatedsplitfoundationstructures |