Modal Parameter Extraction of Z24 Bridge Data

摘要

The vibration data obtained from ambient, drop-weight, and shaker excitationtests of the Z24 Bridge in Switzerland are analyzed to extract modal parameters such as natural frequencies, damping ratios, and mode shapes. Two system identification techniques including Frequency Domain Decomposition and Eigensystem Realization Algorithm are employed for the extraction of modal parameters and the stationarity of the bridge is also investigated using time-frequency analysis.