Distribution of strong input energy in base-isolated structures with complex nonlinearity: a parametric assessment
Multidiscipline Modeling in Materials and Structures
ISSN: 1573-6105
Article publication date: 1 February 2023
Issue publication date: 24 February 2023
Abstract
Purpose
Over the past few decades, several base isolation systems have been developed to enhance the performance of structures under extreme earthquake shaking intensities. Recently, to achieve high energy dissipation capabilities, a new generation of multi-stage friction pendulum (FP) bearings known as the “Quintuple Friction Pendulum (QFP)” was introduced in the literature. With the help of its five effective pendula and nine operational regimes, this bearing's major benefits stem from its ability to accomplish complicated multi-stage adaptive behavior with smoothed loading and unloading when subjected to lateral forces.
Design/methodology/approach
Within the assessment context, five finite element models of reinforced concrete frames supported on QFP isolators with different properties will be developed in OpenSees. Thereafter, a set of 60 earthquakes will be analyzed using the nonlinear time history analysis approach, and the impact of each ground motion record's properties will be evaluated.
Findings
Overall, the study's findings have demonstrated that the characteristics of the isolator, combined with the type of earthquake being applied, have a substantial impact on the isolator's behavior.
Originality/value
Currently, no studies have examined the energy distribution of structural systems equipped with this type of isolation system while considering the influence of earthquake characteristics. Thus, this study is intended to extend the findings available in the literature by discussing and illustrating the distribution of strong ground motions input energy into highly nonlinear base-isolated systems that account for the bearing and superstructural materials' nonlinearity, geometric nonlinearity and leakage-prevented viscous damping nonlinearity. Besides, it investigates the influence of various earthquake characteristics on the energy dissipation of such buildings.
Keywords
Acknowledgements
The authors would like to gratefully acknowledge the financial support provided by Eastern Mediterranean University (BAP-C No: 02-21-02). Any opinions, findings, conclusions, or recommendations expressed in this material are those of the authors and do not necessarily reflect those of Eastern Mediterranean University.
Citation
Habib, A. and Yildirim, U. (2023), "Distribution of strong input energy in base-isolated structures with complex nonlinearity: a parametric assessment", Multidiscipline Modeling in Materials and Structures, Vol. 19 No. 2, pp. 324-340. https://doi.org/10.1108/MMMS-08-2022-0158
Publisher
:Emerald Publishing Limited
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