Abstract
Ambient vibration measurement is a convenient tool for health monitoring of structures in service. The authors proposed a new procedure for structural inversion analysis from ambient vibration data, which resolves some problems of the previous methods. The main advantages of the proposed procedure are: for modal analysis, the method can distinguish noise from meaningful mode and deal with multi-input system; for the inversion analysis, the procedure does not require any assumption over damping, prior estimation of structural properties, or iterative approach. The method is applied to ambient response data of Hakucho Bridge. Since authors applied a different procedure for structural inversion analysis to the same bridge before, the results are compared and the effectiveness of the new method is demonstrated.
