Palmiere_eqe.3313.pdf (5.68 MB)
Dynamic response analysis of nonlinear secondary oscillators to idealised seismic pulses
journal contribution
posted on 2020-06-12, 14:32 authored by Stavros Kasinos, Mariateresa Lombardo, Nicos Makris, Alessandro PalmeriThe paper deals with the seismic response analysis of nonlinear secondary oscillators. Bilinear, sliding and rocking single-degree-of-freedom dynamic systems are analysed as representative of a wide spectrum of secondary structures and non-structural components. In a first stage, the equations governing their full dynamic interaction with linear multi-degree-of-freedom primary structures are formulated, and then conveniently simplified using primary-secondary two-degree-of-freedom systems and dimensionless coefficients. In a second stage, the cascade approximation is applied, whereby the feedback action of the secondary oscillator on the primary structure is neglected. Owing to the piecewise linearity of the secondary systems being considered, efficient semi-analytical and step-by-step numerical solutions are presented. The semi-analytical solutions allow the direct evaluation of the seismic response under pulse-type ground excitations and are also used to validate step-by-step numerical schemes, which in turn can be used for general-type seismic excitations. In a third stage, a set of decoupling criteria are proposed for the pulse-type base excitations, identifying the conditions under which a cascade analysis is admissible from an engineering standpoint. Finally, the influence and relative dependencies between the input parameters of the ground motion and the primary-secondary assembly are quantified on the response of the secondary systems through nonlinear floor response spectra, and general trends are identified and discussed.
History
School
- Architecture, Building and Civil Engineering
Published in
Earthquake Engineering and Structural DynamicsVolume
49Issue
14Pages
1473-1495Publisher
John Wiley & Sons LtdVersion
- VoR (Version of Record)
Rights holder
© The AuthorsPublisher statement
This is an open access article under the terms of the Creative Commons Attribution (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.Acceptance date
2020-06-06Publication date
2020-07-21Copyright date
2020ISSN
0098-8847eISSN
1096-9845Publisher version
Language
- en
Depositor
Dr Alessandro Palmeri. Deposit date: 10 June 2020Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC