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ISSN 2753-3239
ISSN 2753-3239
CCC: 3
PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY
PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY
Edited by: B.H.V. Topping and J. Kruis
Paper 11.1
Analysis of different base isolation systems for irregular structures under dynamic loadings
D. Cancellara and F. De Angelis
Department of Structures for Engineering and Architecture, University of Naples Federico II, Italy
Full Bibliographic Reference for this paper
D. Cancellara, F. De Angelis, "Analysis of different base isolation systems for
irregular structures under dynamic loadings", in B.H.V. Topping, J. Kruis, (Editors), "Proceedings of the Fourteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK,
Online volume: CCC 3, Paper 11.1, 2022, doi:10.4203/ccc.3.11.1
Keywords: base isolation systems, dynamic analysis, nonlinear structural analysis,
structural vulnerability, irregular structures, bi-directional ground motions.
Abstract
In the present work two different base isolation systems are analyzed for the
reduction of the vulnerability of irregular in plan structures under dynamic loadings.
The first considered base isolation system is realized by high damping rubber
bearings placed in combination with friction sliders. The second considered base
isolation system is realized by lead rubber bearings placed in combination with
friction sliders. Different recorded accelerograms with bi-directional ground motions
are employed in the analysis. A nonlinear dynamic analysis is performed by
determining the time history of the base shear of the superstructure, the time history
of the displacement at the base of the superstructure and the time history of the interstorey
drift under the considered bi-directional seismic actions. Accordingly, a
comparative analysis of the different base isolation systems is performed and the
results are compared with the ones of the fixed base structure in order to actually
evaluate the effectiveness of the base isolation strategy.
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