Abstract

This article proposes a new method which can be used in order to evaluate the mechanical responses of the spans. In fact, this method can monitor the stiffness degradation of spans through the time. These monitoring processes will be conducted at different measuring points on spans, different spans within the same measuring period, or within different measuring times. The obtained results show that the application of algorithms of cumulative functions of moments on power spectral density has brought many positive preliminary outcomes in evaluating the quality of projects during their operational period. The study also shows that this cumulative function allows us to identify the dangerous points on spans or on different dangerous spans of a bridge.