张靖皋长江大桥南航道桥主桥塔静气动力系数研究  

Research on Static Coefficient of the Main Tower of Zhang-Jing-Gao South Channel Bridge

作　　者：颜智法 侯斌[1] 孙圣泽 魏乐永[1] 马如进[2] YAN Zhi-fa;HOU Bin;SUN Sheng-ze;WEI Le-yong;MA Ru-jin(CCCC Highway Consultants Co.Ltd.,Beijing 100010,China;Department of Bridge Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]中交公路规划设计院有限公司,北京市100010 [2]同济大学桥梁工程系,上海市200092

出　　处：《公路》2023年第6期28-33,共6页Highway

基　　金：国家重点研发计划项目,项目编号2021YFB1600301。

摘　　要：张靖皋长江大桥南航道桥主桥塔塔高超过300 m,采用倒角矩形截面设计,风荷载效应突出。为对该桥塔气动性能进行精细分析,采用缩尺比为1∶100的分段刚性模型进行风洞测力试验,研究桥塔各段静气动力系数随风偏角的变化规律,并分析塔柱间的遮挡效应和横梁对静气动力系数的影响,结果表明,主塔上、中、下3段最大阻力系数为1.125,最大升力系数为1.329,塔柱间的遮挡效应在风偏角0°~20°时对阻力系数影响较大,横梁对塔柱升力系数和扭矩系数影响较大。研究成果对300 m级超高桥塔设计具有一定的参考意义。The main tower height of Zhang-Jing-gao South Channel Bridge is more than 30o m,the chamfered rectangular section is adopted and its wind load effect is prominent.In order to analyze the aerodynamic performance of the tower in detail,a sectional rigid model with a scale ratio of 1:1oo is used for wind tunnel force test to study the variation law of the static coefficients of each section of the bridge tower with the wind yaw angle and analyze the influence of shielding effect between tower columns and beam on the static coefficient.The results show that the maximum resistance coefficient of the upper,middle and lower sections of the main tower is 1.125,and the maximum lift coefficient is 1.329.The shielding effect between the tower columns had a greater impact on the resistance coefficient when the wind yaw angle is 0°~20°,and the cross beam has great influence on the lift coefficient and torque coefficient of the tower column.The research results have certain reference significance for the design of 300 m-level super highbridgetower.

关 键 词：大跨度悬索桥 超高桥塔 风洞测力试验 静气动力系数 

分 类 号：U441.5[建筑科学—桥梁与隧道工程] U448.25[交通运输工程—道路与铁道工程]