Effect of load redistribution of a steel truss bridge due to fracture of a truss member on vibration-based fault detec

This study investigates how damage in a steel truss member results in load redistribution, and also to examine how the load redistribution affects fault detection utilizing the traffic-induced vibration data of a nine-span continuous steel truss bridge. This study deems the Mahalanobis distances (MD) of frequency, damping constant and damage indicator derived from linear system parameters of a time series model as damage-sensitive features. Potential changes in the damage-sensitive features due to damage are emphasized by the Mahalanobis-Taguchi system (MTS) (Taguchi & Jugulum 2000).