Finite element model calibration of multi-story buildings through interferometric imaging and spectral ratio method

Abstract

Abstract:In order to identify and calibrate the Finite Element (FE) model for multi-story buildings, a simplifıed approach is being introduced in this paper; this methodology is based on Interferometric Imaging and encompasses Spectral Ratio (SR) method. TheInterferometric Imaging provides a new set of seismic data free of coupling between structure to its subsurface and independent of the excitation of the building. The SR method, on the other hand, is the ratio of Fourier Amplitude Spectra of the roofdeconvoulted records on two adjacent stories. The newly introduced methodology enables each story to be identified uniquely for its stiffness since the SR of a particular story is dependent only on the properties of itself and the stories above.