S形曲线斜拉桥非线性静风稳定性分析  

Nonlinear Static Wind Stability Analysis of S-shaped Cable-stayed Bridge

作　　者：杨吉新[1] 刘畅 黎建华 孙亭亭[1] YANG Jixin;LIU Chang;LI Jianhua;SUN Tingting(School of Transportation,Wuhan University of Technology,Wuhan 430063,China;Central and Southern China Municipal Engineering Design&Research Institute Co.Ltd.,Wuhan 430000,China;CCCC Second Harbor Consultants Co.Ltd.,Wuhan 430060,China)

机构地区：[1]武汉理工大学交通学院,武汉430063 [2]中国市政工程中南设计研究总院有限公司,武汉430000 [3]中交第二航务工程勘察设计院有限公司,武汉430060

出　　处：《武汉理工大学学报（交通科学与工程版）》2020年第5期827-831,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：跨越复杂地形且满足结构受力要求,曲线斜拉桥由于其特殊的空间几何结构形态使其结构受力与直线斜拉桥有较大不同.为判断其抗风性能,依托大连滨海大道曲线斜拉桥工程,对S形曲线斜拉桥的非线性静风稳定性展开研究.验证数值模拟准确性后通过WORKBENCH平台建立主梁断面数值模型并划分结构网格,导入FLUENT中分别求得五类风攻角作用下主梁三分力系数,并分析其流场分布.采用ANSYS建立全桥模型,通过ANSYS中程序设计语言(APDL)编写桥梁非线性静风失稳临界风速求解程序,对曲线斜拉桥静风失稳动态进行全过程求解.结果表明:随着风攻角的增大,曲线斜拉桥主跨扭转变形逐渐增大至发散,具有较高的风荷载敏感性.Crossing complex terrain and meeting the structural stress requirements,curved cable-stayed bridges have different structural stress from straight cable-stayed bridges due to their special spatial geometry.In order to judge its wind resistance,the nonlinear static wind stability of S-shaped curved cable-stayed bridge was studied based on Dalian Binhai Avenue curved cable-stayed bridge project.After verifying the accuracy of the numerical simulation,the numerical model of the main beam section was established through the WORKBENCH platform,and the structural mesh was divided.The three-component force coefficients of the main beam under the action of five kinds of wind attack angles were obtained by importing into FLUENT,and the flow field distribution was analyzed.The whole bridge model was established by ANSYS,and the critical wind speed solution program for nonlinear static wind instability of bridge was written by APDL in ANSYS,so as to solve the dynamic static wind instability of curved cable-stayed bridge in the whole process.The results show that with the increase of wind attack angle,the torsional deformation of the main span of curved cable-stayed bridge gradually increases and diverges,which has high wind load sensitivity.

关 键 词：曲线斜拉桥 静风稳定 风攻角 临界风速 静三分力系数 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]