Dynamic ground compliance in multistorey buildings

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Journal titleJournal of Sound and Vibration
Pages615622; # of pages: 8
AbstractA study is presented of the changes in the characteristics of the natural modes of vibration for multistorey structures which are founded on flexible foundations. First a standard eigevalue proble is formulated for the proportionally damped case. Then general relationships of changes in natural frequencies and mode shapes are derived for the linear vibration theory. By means of an example probelm, it is demonstrated, however, that only the first mode obeys the prdicted changes of frequencies and mode shapes over a wide range of foundation stiffness. The higher modes are shown to deviate substantially from the linear behaviour. This deviation is ascribed to geometric changes in mode shapes.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number11977
NPARC number20374987
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Record identifier82bbb9f6-3af9-4647-8f0a-2847281fd794
Record created2012-07-23
Record modified2016-05-09
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