Fang, S;
Quan, C;
He, Z;
Cashell, KA;
(2025)
The influence of mass ratio on the response of inter-storey seismic isolation systems.
Structures
, 71
, Article 108113. 10.1016/j.istruc.2024.108113.
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Cashell_Fang et al (2024) The influence of mass ratio on the response of inter-storey seismic isolation systems.pdf - Accepted Version Access restricted to UCL open access staff until 27 December 2025. Download (1MB) |
Abstract
For super high-rise buildings, previous seismic analyses have focused on the installation of dampers and braces to improve seismic resistance, while the isolation effect of inter-storey seismic isolation has generally been overlooked. The structural response varies with the location of the isolation layer, making it particularly important to analyse the seismic reduction mechanism. In this study, a dynamic analysis model is established for inter-storey seismic isolation systems, focusing on the spectral dynamic characteristics and using the root mean square (RMS) value as a metric for displacement and acceleration transmission. The model is employed to systematically investigate the mechanism of seismic response reduction in these systems as the location of the isolation layer varies. Through the analysis, the impact of parameters, such as the mass ratio between the upper and lower substructures of the inter-storey seismic isolation system and the displacement of the isolation layer, on the overall system design is investigated. Taking the RMS value as a metric, the displacement and acceleration transmission rates for different isolation layer locations are compared. It is observed that as the mass ratio between the upper and lower structures increases, the mechanism of seismic response reduction in the inter-storey isolation system gradually transitions from Tuned Mass Damper (TMD) tuning to isolation energy dissipation. It also can be found that in the isolation area of the middle layer, the response of the upper substructure of the isolation layer is primarily determined by the first mode of vibration. In contrast, the second mode of vibration dominates the response of the lower substructure. These findings indicate that the position of the isolation layer has a significant impact on reducing the seismic response of the structure.
| Type: | Article |
|---|---|
| Title: | The influence of mass ratio on the response of inter-storey seismic isolation systems |
| DOI: | 10.1016/j.istruc.2024.108113 |
| Publisher version: | https://doi.org/10.1016/j.istruc.2024.108113 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Inter-storey isolation, Mass ratio, Non-linear time history analysis, Seismic response reduction, Super high-rise building |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10205066 |
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