论文部分内容阅读
This paper summarizes the analytical and experimental dynamic analyses carried out to assess the actual dynamic behaviour of a curved cable-stayed bridge,recently erected in the commercial harbour of Porto Marghera ( Venice,Italy). Ambient vibration tests were carried out to determine the dynamic characteristics of the bridge and more than 20 modes were identified in the frequency range 0～10Hz. In the theoretical study,a 3D FE model of the bridge was developed using an integrated CAD-FEA approach; subsequently,the information obtained from the field tests,combined with simple manual tuning,provided a linear elastic model,accurately fitting the modal parameters of the bridge in its present condition.
This paper summarizes the analytical and experimental dynamic analyzes carried to assess the actual dynamic behavior of a curved cable-stayed bridge, recently erected in the commercial harbor of Porto Marghera (Venice, Italy). Ambient vibration tests were carried out to determine the dynamic characteristics of the bridge and more than 20 modes were identified in the frequency range 0~10 Hz. In the theoretical study, a 3D FE model of the bridge was developed using an integrated CAD-FEA approach; subsequently, the information obtained from the field tests , combined with simple manual tuning, provided a linear elastic model, accurately fitting the modal parameters of the bridge in its present condition.