AEROSTATIC AND AERODYNAMIC STABILITY ANALYSIS OF SUPER LONG-SPAN CABLE-STAYED BRIDGE UNDER CONSTRUCTION

摘要：

By Taking the worlds longest cable-stayed bridge- the Sutong Bridge over the Yangtze River as example,through simulating the actual construction sequence,the evolutions of aerostatic and aerodynamic stability of the bridge during the whole construction period are investigated numerically by 3D nonlinear aerostatic and aerodynamic analysis. The results show that: with the progress of construction,the critical wind speed of aerostatic instability decreases monotonously,and the worst aerostatic stability is encountered at the maximum single cantilever stage; the critical flutter wind speed also decreases monotonously,and the worst aerodynamic stability is encountered at the bridge in completion. The completion of side spans,the remove of temporary piers from the side spans,the completion of main span and remove of the temporary fixation between the deck and pylons all have important effects on the aerostatic and aerodynamic stability of the bridge under construction.

关键词： Super long-span cable-stayed bridges Construction process Aerostatic stability Aerodynamic stability

作者: Xin-Jun Zhang Wei-Long Xu

作者单位: College of Civil Engineering Architecture,Zhejiang University of Technology,Hangzhou 310014,P.R.China

会议类型: 国际会议

会议名称: The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)

会议地点: 广州

会议语种:英文

页码: 1489-1493

在线出版日期: 2010-12-01（万方平台首次上网日期，不代表论文的发表时间）