Shake-table testing of unreinforced fly ash brick masonry model with unreinforced elastomeric isolator
Abstract Seismic isolation techniques are widely used to mitigate earthquake-induced damage in structures; however, their application in low-cost unreinforced masonry (URM) buildings remains limited. This study investigates the effectiveness of Unreinforced Elastomeric Isolators (UEIs) for improving...
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Nature Portfolio
2025-06-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-04549-5 |
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| author | Zoheb Nawaz Md Mohan S. C. Sri Kalyana Rama Jyosyula |
| author_facet | Zoheb Nawaz Md Mohan S. C. Sri Kalyana Rama Jyosyula |
| author_sort | Zoheb Nawaz Md |
| collection | DOAJ |
| description | Abstract Seismic isolation techniques are widely used to mitigate earthquake-induced damage in structures; however, their application in low-cost unreinforced masonry (URM) buildings remains limited. This study investigates the effectiveness of Unreinforced Elastomeric Isolators (UEIs) for improving the seismic resilience of URM structures through comprehensive shake-table testing. A half-scale, single-story masonry model was constructed based on similitude laws and tested under both isolated and non-isolated conditions. The UEI was designed and experimentally characterized before implementation. Free and forced vibration tests were conducted to determine the natural frequencies of the model, followed by shake table tests simulating seven earthquake ground motions. Results indicate that the non-isolated model experienced significant acceleration amplification, whereas the isolated model demonstrated reduced roof acceleration and overall seismic force transmission. Despite observable rocking motion in the isolated case, the total roof displacement was lower than in the non-isolated scenario. Comparisons of base shear and overturning moments further confirmed the improved seismic performance of the UEI-supported model. These findings highlight UEIs as a promising, cost-effective solution for seismic protection of masonry structures, paving the way for further optimization and real-world implementation. |
| format | Article |
| id | doaj-art-14443d5bce6549c8a9dd33207c804912 |
| institution | OA Journals |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-14443d5bce6549c8a9dd33207c8049122025-08-20T02:05:49ZengNature PortfolioScientific Reports2045-23222025-06-0115112010.1038/s41598-025-04549-5Shake-table testing of unreinforced fly ash brick masonry model with unreinforced elastomeric isolatorZoheb Nawaz Md0Mohan S. C.1Sri Kalyana Rama Jyosyula2Department of Civil Engineering, BITS Pilani Hyderabad CampusDepartment of Civil Engineering, BITS Pilani Hyderabad CampusDepartment of Civil Engineering, Ecole Centrale School of Engineering, Mahindra UniversityAbstract Seismic isolation techniques are widely used to mitigate earthquake-induced damage in structures; however, their application in low-cost unreinforced masonry (URM) buildings remains limited. This study investigates the effectiveness of Unreinforced Elastomeric Isolators (UEIs) for improving the seismic resilience of URM structures through comprehensive shake-table testing. A half-scale, single-story masonry model was constructed based on similitude laws and tested under both isolated and non-isolated conditions. The UEI was designed and experimentally characterized before implementation. Free and forced vibration tests were conducted to determine the natural frequencies of the model, followed by shake table tests simulating seven earthquake ground motions. Results indicate that the non-isolated model experienced significant acceleration amplification, whereas the isolated model demonstrated reduced roof acceleration and overall seismic force transmission. Despite observable rocking motion in the isolated case, the total roof displacement was lower than in the non-isolated scenario. Comparisons of base shear and overturning moments further confirmed the improved seismic performance of the UEI-supported model. These findings highlight UEIs as a promising, cost-effective solution for seismic protection of masonry structures, paving the way for further optimization and real-world implementation.https://doi.org/10.1038/s41598-025-04549-5Unreinforced elastomeric isolatorShake table-testingUnreinforced fly ash brick masonryBase isolationLow-cost isolation system |
| spellingShingle | Zoheb Nawaz Md Mohan S. C. Sri Kalyana Rama Jyosyula Shake-table testing of unreinforced fly ash brick masonry model with unreinforced elastomeric isolator Scientific Reports Unreinforced elastomeric isolator Shake table-testing Unreinforced fly ash brick masonry Base isolation Low-cost isolation system |
| title | Shake-table testing of unreinforced fly ash brick masonry model with unreinforced elastomeric isolator |
| title_full | Shake-table testing of unreinforced fly ash brick masonry model with unreinforced elastomeric isolator |
| title_fullStr | Shake-table testing of unreinforced fly ash brick masonry model with unreinforced elastomeric isolator |
| title_full_unstemmed | Shake-table testing of unreinforced fly ash brick masonry model with unreinforced elastomeric isolator |
| title_short | Shake-table testing of unreinforced fly ash brick masonry model with unreinforced elastomeric isolator |
| title_sort | shake table testing of unreinforced fly ash brick masonry model with unreinforced elastomeric isolator |
| topic | Unreinforced elastomeric isolator Shake table-testing Unreinforced fly ash brick masonry Base isolation Low-cost isolation system |
| url | https://doi.org/10.1038/s41598-025-04549-5 |
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