三塔悬索桥施工过程抗风稳定性研究  

Wind stability of three-tower suspension bridges under construction

作　　者：张新军[1] 郭辉[1] 

机构地区：[1]浙江工业大学,浙江杭州310014

出　　处：《土木工程学报》2011年第12期58-63,共6页China Civil Engineering Journal

基　　金：浙江省自然科学基金(502118;Y104577)

摘　　要：以目前世界首座跨度超千米的三塔悬索桥——泰州长江公路大桥为工程背景,分别模拟主梁从主跨跨中向两侧桥塔、从两侧桥塔向主跨跨中以及从两侧桥塔和主跨跨中同时向主跨四分点处对称拼装的施工顺序,采用三维非线性空气静力和动力稳定性分析方法,分析主梁拼装过程结构的空气静力和动力稳定性的演变规律,并从抗风稳定性角度提出三塔悬索桥适宜的主梁拼装施工顺序。结果表明:主梁从两侧桥塔向主跨跨中对称拼装施工时,结构的空气静力和动力稳定性最好,是大跨度三塔悬索桥一种适宜的主梁拼装施工顺序。Taking the first three-tower suspension bridge in the world with a main span over 1000 meters - the Taizhou Highway Bridge over the Yangtze River as example, for three different construction sequences of the deck, erected symmetrically from the midpoints of the main spans to the pylons, from the pylons toward the midpoints of the main spans, and simultaneously from the pylons and the midpoints of the main spans toward the quarter points of the main spans, respectively, evolutions of the structural aerostatic and aerodynamic stability during the deck erection process are investigated numerically by 3-1） nonlinear aerostatie and aerodynamic analysis, and the favorable deck erection sequence is discussed with respect to wind stability. The results show that the best aerostatic and aerodynamic stability is achieved under the deck erection sequence of pylons to midspans, which is considered to be favorable for three-tower suspension bridges.

关 键 词：三塔悬索桥 主梁拼装施工顺序 空气静力稳定性 空气动力稳定性 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]