Response Properties of Self-Anchored Suspension Bridges to Aerostatic Wind

This paper uses ANSYS software with an improved incremental iteration nonlinear method to analyze the nonlinear response of self-anchored suspension bridges to aerostatic wind. Results of the analysis show that significant changes occur in the girder's vertical displacement and its rotation angle when the initial wind attack angle varies. On the other hand, the wind load on the cable system has a significant influence on the lateral displacement of the girder; the added wind attack angle also has significant influence on the vertical displacement of the girder. Therefore, in the calculation of aerostatic response, the added attack angle of the girder must be considered to prevent non-negligible errors occurring in the displacement responses and in the calculation of critical wind speed for aerostatic instability. Under aerostatic wind action, the first order natural frequency first increases gradually with wind speed then accelerates quickly before a sudden drop once the frequency reaches the aerostatic instability frequency.

並列關鍵字

Self-Anchored Suspension Bridges ； Aerostatic Loads ； Aerostatic Responses ； Aerostatic Instability Wind Velocity

國際替代計量

全文下載

主題瀏覽