Gallardo, Jose;
De La Llera, Juan Carlos;
Crempien, Jorge;
Freddi, Fabio;
Rossetto, Tiziana;
Cembrano, Jose;
Chacón, Matías;
... Dede, Sahin; + view all
(2023)
Sensitivity of the earthquake response of a HDRB seismically isolated hospital to earthquakes on crustal faults.
In:
Proceedings of Conference Earthquake risk and engineering towards a resilient world (SECED 2023).
Society for Earthquake and Civil Engineering Dynamics (SECED): Cambridge, UK.
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Abstract
: Seismicity in Chile is strongly dominated by subduction megathrust events. Hence, the characteristics of ground motions other than those produced by these events are less known. Such is the case for the ground motions generated by crustal faults close to urban areas; one example is the San Ramon fault (SRF), which was recently declared as potentially active. This work addresses the sensitivity of the structural response of a High Damping Rubber Bearing (HDRB) seismically isolated hospital in downtown Santiago, Chile, to earthquakes generated on this Fault. The SRF lies at less than 15 kilometers away from the hospital and there is very little data on its seismogenic capacity and source parameters. Hence, physics-based synthetic earthquake simulations using front-end technologies and bounds for the source parameters are used to predict the impact of such event in the performance of this test structure. The earthquake source parameters considered as uncertain in this study are the event magnitude, average rupture velocity, and corner frequency. To minimize the number of parameter combinations, a median, an upper, and a lower bound value were selected for each parameter. A set of 16 synthetic ground motion realizations were generated for each parameter combination (27), leading to a total of 432 synthetic records for the analysis. The variability of these records, and the inelastic cyclic response of the HDRBs, are used to compute the expected variations in the earthquake response of the hospital. Building response parameters, such as maximum deformation and shear forces of the isolated layer, inter-story building drifts, and floor accelerations of the superstructure are used to characterize variability of the hospital response. It is concluded that despite the smaller magnitudes of crustal events relative to the subduction ones, they will control some of the response limit states for buildings closer than 15 km to the fault, such as this seismically isolated hospital.
| Type: | Proceedings paper |
|---|---|
| Title: | Sensitivity of the earthquake response of a HDRB seismically isolated hospital to earthquakes on crustal faults |
| Event: | Conference Earthquake risk and engineering towards a resilient world (SECED 2023) |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://www.seced.org.uk/index.php/seced-2023-proc... |
| 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 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/10177368 |
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