Gutiérrez-Urzúa, Fernando;
Freddi, Fabio;
De La Llera, JC;
Crempien, JGF;
Gallardo, JA;
Muñoz, JP;
Rossetto, Tiziana;
... Chacón, MF; + view all
(2024)
Seismic Behavior of Isolated Structures under Subduction and Crustal Ground Motions: A Comparative Study.
In:
Proceedings of the 18th World Conference on Earthquake Engineering (18WCEE).
International Association for Earthquake Engineering (IAEE)
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Abstract
Seismic isolation decouples the modal characteristics of the structure from those of the ground motion, thus reducing structural demands, particularly under intense earthquakes. Seismic isolation is particularly beneficial when used for strategic facilities such as hospitals, as it often allows the building to remain operational in the aftermath of an earthquake-related disaster. Although the use of these devices is widespread in earthquake-prone regions, there are still open issues that require to be studied. These open issues include the performance and reliability of the seismic isolation systems when subjected to earthquakes with characteristics that are different than those considered during the design. The present study investigates the seismic performance of a case study isolated hospital with a high-damping rubber compound in Santiago, Chile, considering sets of ground motions generated by either megathrust subduction or crustal fault mechanisms. A 3D finite element model of a case study hospital is developed in OpenSees. Sets crustal ground motions resulting from earthquake rupture scenarios on the San Ramon Fault are generated by the UCSB method, which involves simulating a synthetic earthquake source with specified temporal and spatial slip on the fault. Successively, sets of ‘equivalent’ recorded subduction ground motions are selected. Incremental Dynamic Analyses (IDAs) are used to compute different local and global Engineering Demand Parameters (EDPs) considering records from the two types of events (subduction vs. crustal), both considering and not considering the vertical component of the ground motion. The results show the paramount importance of considering different seismic sources to better understand/predict the seismic response of isolated structures.
| Type: | Proceedings paper |
|---|---|
| Title: | Seismic Behavior of Isolated Structures under Subduction and Crustal Ground Motions: A Comparative Study |
| Event: | 18th World Conference on Earthquake Engineering (WCEE2024) |
| Location: | Milan |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://proceedings-wcee.org/index.html |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| 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/10195542 |
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