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Structural identification in the frequency domain from earthquake records
Author(s) -
McVerry Graeme H.
Publication year - 1980
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.4290080206
Subject(s) - acceleration , frequency domain , fourier transform , frequency response , spectral acceleration , peak ground acceleration , response analysis , identification (biology) , earthquake simulation , time domain , geology , seismology , structural engineering , system identification , earthquake engineering , excitation , computer science , mathematical analysis , engineering , mathematics , physics , ground motion , data mining , classical mechanics , electrical engineering , biology , measure (data warehouse) , botany , computer vision
A method has been developed to identify the parameters of the lower modes of a linear, time‐invariant model of a structure from its recorded earthquake response. The identification is performed by selecting the parameters to obtain a least squares fit over a specified frequency band between the unsmoothed, complex‐valued finite Fourier transform of the recorded acceleration response and the corresponding transform calculated from the response of the model. By including the effects of the initial and final conditions in the analysis, only a portion of the recorded excitation and response acceleration histories need be considered. The method is demonstrated first by an application to generated test data, and then to measured earthquake response.