Investigation of seismic isolation efficiency for building structures

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Date

2016

Author

Özdemir, Seda

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The main goal of this study is to assess the efﬁcacy of seismic isolation for building type of structures with different structural systems, namely, dual systems and moment frame systems having also different number of ﬂoors. Speciﬁc to this study, the main parameters employed for efﬁcacy assessment will be the interstorey drift ratio and ﬂoor acceleration since both structural and non-structural damage to be occured in a system are directly related to these two parameters. To assess the variations in interstorey drift ratio and ﬂoor accelerations between different structural systems, linear elastic response spectrum analysis procedures are followed for two different site-speciﬁc seismicity levels representing two site regions from Izmir and Isparta, respectively. To enhance the accuracy of the response, seismically isolated dual systems having different number of ﬂoors are analyzed non-linearly in modal space under the seismicity level of Izmir, since for non-structural content, ﬂoor acceleration value that the structure undergoes has a special importance when the content of a building constitutes of valuable acceleration-sensitive equipments. The analyses performed in this thesis work indicated that for both type of structural systems, by the application of seismic isolation design method,the efﬁciency of reduction in interstorey drift and ﬂoor acceleration decreases as the number of ﬂoor increases. In addition, the amount of efﬁciency differ from each other between dual systems and moment frame systems. Another major conclusion is that linear elastic analysis procedures may underestimate both ﬂoor acceleration and interstorey drift responses.

Subject Keywords

Earthquake engineering., Earthquake hazard analysis., Buildings, Earth movements and building.

URI

http://etd.lib.metu.edu.tr/upload/12620678/index.pdf
https://hdl.handle.net/11511/26214

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

S. Özdemir, “Investigation of seismic isolation efficiency for building structures,” M.S. - Master of Science, Middle East Technical University, 2016.