Abstract

A health monitoring technique for estimating the performance degradation of antiseismic devices is presented. The approach was validated through data obtained from a 3D finite element model of a bridge structure as well as through records obtained from a real bridge equipped with viscous dampers. The records from the real structure were collected during ambient vibrations as well as a seismic event. The procedure appears capable of detecting early stages of performance variation in the devices, both in terms of location and severity level. It also requires a rather limited number of sensors, typical of a basic monitoring installation. The procedure appears feasible for application to many devices commonly installed in bridges.

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