Development of smart sensor node for hybrid health monitoring on PSC girders

In this study, a smart sensor node is developed for hybrid health monitoring of PSC girder bridges. Hybrid health monitoring of those structures is to alarm damage occurrence, to classify damage-types, and to identify damage locations and severities by measuring accelerations and impedance signals. In order to achieve the objective, the following approaches are implemented. Firstly, a smart sensor node with wireless sensing capacity and embedded monitoring algorithms is developed for measuring acceleration. Secondly, we design a hybrid damage monitoring scheme that combines acceleration-based and impedance-based methods for PSC girder bridges. Finally, the performance of the smart sensor node is evaluated using a laboratory-scale PSC girder bridge model for which acceleration and impedance signals were measured for prestress-loss and stiffness-loss cases.