%0 Generic
%A Gutiérrez-Urzúa, Fernando
%A Freddi, Fabio
%A De La Llera, JC
%A Crempien, JGF
%A Gallardo, JA
%A Muñoz, JP
%A Rossetto, Tiziana
%A Dede, Sahin
%A Cembrano, J
%A Rivera, Felipe
%A Chacón, MF
%D 2024
%F discovery:10195542
%I International Association for Earthquake Engineering (IAEE)
%T Seismic Behavior of Isolated Structures under Subduction and Crustal Ground Motions: A Comparative Study
%U https://discovery.ucl.ac.uk/id/eprint/10195542/
%X 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.
%Z This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.