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Title: On the characterisation of the phase spectrum for strong motion synthesis
Authors: Shrikhande, Manish
Gupta V.K.
Published in: Journal of Earthquake Engineering
Abstract: A new approach has been presented to characterise phase spectra for simulating realistic nonstationary characteristics in synthetic accelerograms. The phase characteristics of the recorded earthquake accelerograms have been studied for this purpose and it has been found that the phase curve/unwrapped phases exhibit a monotonic downward trend which allows the problem of phase characterisation to be cast as a constrained nonlinear programming problem. The phase spectrum is first characterised by matching mean and variance of the generated distribution of relative phases with those obtained from recorded motions. As a practical application, it is shown how phase spectra can be characterised for an ensemble of synthetic accelerograms so as to maximise the severity of sample realisations.
Citation: Journal of Earthquake Engineering (2001), 5(4): 465-482
Issue Date: 2001
Keywords: Fourier synthesis
Nonlinear programming
Phase spectrum
Phase unwrapping
Strong motion
Synthetic accelerogram
ISSN: 13632469
Author Scopus IDs: 6603685630
Author Affiliations: Shrikhande, M., Department of Earthquake Engineering, University of Roorkee, Roorkee-247667, India
Gupta, V.K., Department of Civil Engineering, Indian Inst. of Technology Kanpur, Kanpur-208016, India
Corresponding Author: Shrikhande, M.; Department of Earthquake Engineering, University of Roorkee, Roorkee-247667, India; email:
Appears in Collections:Journal Publications [EQ]

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