Analysis of the behavior of a flexible building with seismic isolation in various interfaces
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2021
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Conference Paper
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Abstract
In previous research presented in the 16WCEE, the seismic response of a typical 19-story building for residential use in Mexico was analyzed. The structural system of the structure is based on reinforced concrete frames and walls with a fixed base. Design alternatives were proposed adding seismic isolation at one and two interfaces, presenting uplift issues in the case of one-interface isolation system due to its high slenderness. This issue was solved with the two-interface isolation system setting, installing sliding isolators at the base and the seventh level, reducing the observed uplifting. The proposed solution was considered an effective way to reducing uplifting when applying base seismic isolation to slender medium rise buildings, however, this solution has not been studied for taller high-rise buildings with larger slenderness. In this paper, the response of the same building with the same structural settings is analyzed, but increasing to a 60-story building with a total height of 220 meters. Three configurations were studied: two 30-story block interface; three 20-story block interface; and four 15-story block interface. In each configuration the isolation interface consisted on sliding isolators. The responses of each model are analyzed to determine the optimal number (technically and economically) of stories of each rigid block that the building should be divided in order to obtain the desired performance. The response of the structure is obtained by nonlinear time-history analysis. The results obtained show a considerable energy-dissipation at each interface level, reducing seismic response, passing them from the first mode (fixed base building) to their nth mode according to the number of interfaces added.
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published
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Proceedings of the Seventeenth World Conference on Earthquake Engineering Japan 2021
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National Information Center of Earthquake Engineering
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17th World Conference on Earthquake Engineering (17WCEE 2020-21)
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Subject
Flexible building; seismic isolation; multiple interfaces
Organisational unit
09663 - Vassiliou, Michalis (ehemalig) / Vassiliou, Michalis (former)
Notes
Conference postponed due to Corona virus (COVID-19), and rescheduled from September 13–18, 2020 to September 27 – October 2, 2021