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Earthquake response analysis of multistorey buildings including foundation interaction
Author(s) -
Chopra Anil K.,
Gutierrez Jorge A.
Publication year - 1974
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.4290030106
Subject(s) - structural engineering , foundation (evidence) , vibration , ground motion , engineering , response analysis , earthquake resistance , ritz method , physics , acoustics , archaeology , history
An efficient method, based on the Ritz concept, for dynamic analysis of response of multistorey buildings including foundation interaction to earthquake ground motion is presented. The system considered is a shear building on a rigid circular disc footing attached to the surface of a linearly elastic halfspace. In this method, the structural displacements are transformed to normal modes of vibration of the building on a rigid foundation. The analysis procedure is developed and numerical results are presented to demonstrate that excellent results can be obtained by considering only the first few modes of vibration. As the number of unknowns are reduced by transforming to generalized co‐ordinates, the method presented is much more efficient than direct methods.