Applications of seismic interferometry for system identification in earthquake engineering

Abstract eng:
Seismic Interferometry provides a new approach to analyze seismic signals based on the correlation of synchronized records collected from different locations. In structures, this correlation can be shown to lead to the Green’s functions that account for the wave propagation between different receivers in the structure. The properties of the waves can be investigated without knowing the seismic input that generated the waves. Seismic Inteferometry also leads to the development of simple techniques for generating analytical models from recorded responses of structures. For multi-story buildings, it can be shown that, when deconvolved with the roof record, the floor responses are equivalent to a simple downgoing wave. This allows us to develop the analytical model for each floor individually, starting from the top floor and continuing downward one floor at a time.

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