Damping estimation by frequency domain decomposition

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Output-only modal identification of a reinforced concrete bridge from radar-based measurements (2008, methodology): “advanced Frequency Domain Decomposition [8]-[9] and Stochastic Subspace Identification methods [10]-[11].”
Output-only modal dynamic identification of frames by a refined FDD algorithm at seismic input and high damping (2016, methodology): “With the EFDD algorithm [18], [17], further development of the FDD technique, modal damping ratios and undamped frequencies can be evaluated.”
Full‐scale dynamic response of an RC building under weak seismic motions using earthquake recordings, ambient vibrations and modelling (2007, methodology): “Moreover, this method can be enhanced [31] to select the complete mode “bell”, and consequently its damping ratio, by comparing the mode shape at the peak to the mode shapes of the surrounding frequency values.”