Sensitivity-based operational mode shape normalization: application to a bridge

Recently, an innovative sensitivity-based technique was introduced for the normalisation of operational mode shapes purely on a basis of output-only data. The technique is based on the use of a controlled mass modification experiment and does not involve any analytical models. Moreover, it allows to extend the applicability of many modal analysis based applications towards the domain of in-operation modal testing. Previously, this method was successfully tested by means of experiments on various mechanical engineering structures. The focus of this contribution is the validation of the sensitivity-based normalisation technique on a civil structure. For this purpose, measurements were performed on a bridge.