Baseline finite element modeling of a large span cable-stayed bridge through field ambient vibration tests

作者：Ren WX^*; Peng XL

来源：Computers & Structures, 2005, 83(8-9): 536-550.

DOI：10.1016/j.compstruc.2004.11.013

• cable-stayed bridge
• finite element model
• baseline
• structural dynamics
• health monitoring
• ambient vibration test
• modal analysis
• cable tension

A baseline finite element model is a reference in structural damage detection and long-term health monitoring. An ambient vibration measurement based procedure is presented to develop such a baseline model for a newly constructed Qingzhou cable-stayed bridge over the Ming River, Fuzhou, China. A 605 in main span of the bridge is currently the longest in the world among all completed composite-deck cable-stayed bridges. The procedure includes several tasks: finite element modeling, field ambient vibration testing, parametric studies and model validation. It is demonstrated that the ambient vibration measurements are enough to identify the most significant modes of large span cable-stayed bridges with a low range (0-1.0 Hz) of natural frequencies of interest. Some important issues in the modeling of such a complicated bridge, such as the initial equilibrium configuration due to dead load, geometrical nonlinearities, concrete slab, the shear connection of the composite deck, and the longitudinal restraints of the end expansion joints, have been clarified. The developed three-dimensional finite element model of the bridge has achieved a good correlation with the measured natural frequencies and mode shapes identified from field ambient vibration tests.

• 出版日期2005-3
• 单位中南大学; 福州大学