Method to estimate center of rigidity using vibration recordings

Journal of Structural Engineering
By:  and 



A method to estimate the center of rigidity of buildings by using vibration recordings is presented. The method is based on the criterion that the coherence of translational motions with the rotational motion is minimum at the center of rigidity. Since the coherence is a function of frequency, a gross but frequency-independent measure of the coherency is defined as the integral of the coherence function over the frequency. The center of rigidity is determined by minimizing this integral. The formulation is given for two-dimensional motions. Two examples are presented for the method; a rectangular building with ambient-vibration recordings, and a triangular building with earthquake-vibration recordings. Although the examples given are for buildings, the method can be applied to any structure with two-dimensional motions.
Publication type Article
Publication Subtype Journal Article
Title Method to estimate center of rigidity using vibration recordings
Series title Journal of Structural Engineering
DOI 10.1061/(ASCE)0733-9445(1990)116:1(85)
Volume 116
Issue 1
Year Published 1990
Language English
Publisher ASCE
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Structural Engineering
First page 85
Last page 97
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