三塔悬索桥的缆索体系及其抗风稳定性  

Cable system and wind stability of three-tower suspension bridges

作　　者：张新军[1] 陈兰[1] 赵孝平[1] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310032

出　　处：《浙江工业大学学报》2010年第4期437-441,共5页Journal of Zhejiang University of Technology

基　　金：浙江省自然科学基金项目(502118;Y104577)

摘　　要：以在建1 080 m主跨的三塔双跨悬索桥-泰州长江公路大桥为工程背景,分别试设计了具有空间缆索体系和平行双缆体系的两座方案桥,采用三维非线性空气静力和动力稳定性分析方法,分别对其动力特性、空气静力和动力稳定性进行了分析和比较,并探讨了具有良好抗风稳定性的三塔悬索桥的合理缆索体系.结果表明:三塔悬索桥采用平面双缆体系尤其是空间缆索体系后,结构的刚度明显增强,具有良好的结构动力特性,结构的抗风稳定性显著提高,相比而言采用空间缆索体系则更有利.Based on a case of three-tower suspension bridge-Taizhou Highway Bridge, which is over the Yangtze River with the main span of 1080 m, two examples with spatial cable system and double cable system, respectively, were designed. The structural dynamic characteristics, the aerostatic and aerodynamic stabilities of these two examples were investigated numerically by 3D nonlinear aerostatic and aerodynamic analysis, and the cable systems of the three-tower suspension bridge were evaluated on basis of the wind stability. The results show that three-tower suspension bridge with either cable system may have greater structural stiffness, better dynamic characteristics and wind stability. And, in comparison with the double cable system, the spatial cable system exhibits better behavior.

关 键 词：三塔悬索桥 空间缆索体系 平面双缆体系 动力特性 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]