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Horizontal floor response spectra of base‐isolated buildings due to vertical excitation
Author(s) -
Politopoulos Ioannis,
Moussallam Nadim
Publication year - 2012
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.1139
Subject(s) - excitation , spectral line , horizontal and vertical , superstructure , coupling (piping) , structural engineering , geology , base (topology) , simple (philosophy) , physics , geometry , engineering , geodesy , mathematics , mathematical analysis , mechanical engineering , quantum mechanics , philosophy , epistemology
SUMMARY A mechanism of horizontal floor response spectra amplification in the vicinity of higher modes' frequencies is investigated. It is demonstrated, by means of a simple two‐degrees‐of‐freedom model, that in the case of unsymmetrical superstructure, such amplification may occur because of the coupling between vertical excitation and horizontal response of the non‐isolated modes. This phenomenon is further illustrated by the results of analyses of a model of a nuclear plant. Copyright © 2011 John Wiley & Sons, Ltd.