000013187 001__ 13187
000013187 005__ 20161114160331.0
000013187 04107 $$aeng
000013187 046__ $$k2009-06-22
000013187 100__ $$aMavronicola E., A.
000013187 24500 $$aOn the suitability of proposed equivalent linear elastic models for multi-story seismically isolated buildings

000013187 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013187 260__ $$bNational Technical University of Athens, 2009
000013187 506__ $$arestricted
000013187 520__ $$2eng$$aSeismic isolation is used in relatively stiff buildings to reduce the induced seismic loads, by shifting their fundamental periods outside the dangerous for resonance range. Seismic isolation systems exhibit non-linear inelastic behavior, which can be sufficiently well represented by bilinear inelastic models. However, simplified linear elastic analysis is often used, at least at the preliminary design and analysis phases of seismically isolated buildings. Therefore, it is very important to investigate the appropriateness of using such linearized models, by comparing their computed responses with those of the more accurate bilinear inelastic models. The proposed in the literature effective characteristics of equivalent linear elastic models that are used to simulate the bilinear hysteretic behavior of seismic isolation are assessed. The proposed methods and formulas are evaluated by comparing the computed peak responses with those that are computed using the corresponding bilinear inelastic models. In particular, this research work investigates whether linearized models are suitable for the analysis of seismically isolated buildings, considering the maximum relative displacements at the isolation level, the peak interstory deflections and the peak absolute floor accelerations. A number of numerical simulations and parametric studies have been performed, using a specially-developed software, to obtain an insight on the accuracy of the proposed equivalent linear elastic models. The analysis results indicate that there are several limitations to the usage of equivalent linear elastic models in the simulations of seismically isolated buildings and suggest that nonlinear inelastic analysis should be performed.

000013187 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013187 653__ $$aSeismic isolation, Bilinear behavior, Linearization, Effective characteristics. Abstract. Seismic isolation is used in relatively stiff buildings to reduce the induced seismic loads, by shifting their fundamental periods outside the dangerous for resonance range. Seismic isolation systems exhibit non-linear inelastic behavior, which can be sufficiently well represented by bilinear inelastic models. However, simplified linear elastic analysis is often used, at least at the preliminary design and analysis phases of seismically isolated buildings. Therefore, it is very important to investigate the appropriateness of using such linearized models, by comparing their computed responses with those of the more accurate bilinear inelastic models. The proposed in the literature effective characteristics of equivalent linear elastic models that are used to simulate the bilinear hysteretic behavior of seismic isolation are assessed. The proposed methods and formulas are evaluated by comparing the computed peak responses with those that are computed using the corresponding bilinear inelastic models. In particular, this research work investigates whether linearized models are suitable for the analysis of seismically isolated buildings, considering the maximum relative displacements at the isolation level, the peak interstory deflections and the peak absolute floor accelerations. A number of numerical simulations and parametric studies have been performed, using a specially-developed software, to obtain an insight on the accuracy of the proposed equivalent linear elastic models. The analysis results indicate that there are several limitations to the usage of equivalent linear elastic models in the simulations of seismically isolated buildings and suggest that nonlinear inelastic analysis should be performed.

000013187 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013187 720__ $$aMavronicola E., A.$$iKomodromos, P.
000013187 8560_ $$ffischerc@itam.cas.cz
000013187 8564_ $$s348040$$uhttps://invenio.itam.cas.cz/record/13187/files/CD251.pdf$$yOriginal version of the author's contribution as presented on CD, section: Seismic isolation - ii.
000013187 962__ $$r13074
000013187 980__ $$aPAPER