Computer simulation of buffeting actions of suspension bridges under turbulent wind

✍ Scribed by Q. Ding; P.K.K.

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 318 KB
• Volume: 76
• Category: Article
• ISSN: 0045-7949
• DOI: 10.1016/s0045-7949(99)00197-2

✦ Synopsis

Suspension bridges are long-span ¯exible structures susceptible to various types of wind induced vibrations such as bueting actions. In this paper, a three dimensional ®nite-element model formulated to deal with suspension bridges under turbulent wind is presented. In this model, all sources of geometric nonlinearity such as cable sag, force-bending moment interaction in the bridge deck and towers, and changes of bridge geometry due to large displacements, are fully considered. The wind loads, composed of steady-state wind loads, bueting loads and selfexcited loads, are converted into time domain by using the computer simulation technique. The Newmark-b step by step numerical integration algorithm is used to calculate the bueting responses of bridges. Compared with the results obtained by classical bueting theory, the validity of the simulation is proved.