Structural health monitoring on spans using the resonance regions of the power spectrum density (rr-psd)

This article proposes a new method which can be used to evaluate the mechanical responses of damage detection in spans. This method can monitor the stiffness degradation of spans over time. This monitoring processes will be conducted at different measuring points on spans, on different spans at the same or different measuring periods. The obtained results show that the change of acreage in the resonance regions of the power spectrum density has brought many positive preliminary outcomes in evaluating the quality of projects during their operational period. The study also shows that the change of acreage in the resonance regions allows us to identify the dangerous points on different spans of a bridge.