This paper presents theoretical studies on modal properties of the tower-cable system at the construction state of suspension bridge. The finite element modelling for the system is established, in which the tower legs and cross-beams are modelled as three-dimensional Timoshenko beam elements and the cables are modelled by means of a series of two-node cable elements accounting for the geometric and large deflection stiffness. Based on the proposed finite element modelling, a three-dimensional finite element program has been developed and the modal analysis of the tower-cable system is performed. A comparison is made between the modal properties of cable-connected tower and those of free-standing tower. Some important modal characteristics of the tower-cable system are found. The comparison with the field measurements indicated a good agreement between theoretical and experimental results. The conclusions obtained give a good understanding to the dynamic behaviors of the tower-cable system, and they will be useful in structural damage monitoring and the employment of vibration control measures during the construction stage of the suspension bridge.
|Number of pages||7|
|Journal||Proceedings of the International Modal Analysis Conference - IMAC|
|Publication status||Published - 1 Dec 1997|
|Event||Proceedings of the 1997 15th International Modal Analysis Conference, IMAC. Part 2 (of 2) - Orlando, FL, United States|
Duration: 3 Feb 1997 → 6 Feb 1997
ASJC Scopus subject areas