山区桁架梁悬索桥颤振稳定性气动优化研究  

Study on Flutter Stability Optimization of Truss Suspension Bridge in Mountainous Region

作　　者：刘君[1,2] 廖海黎[1,2] 马存明 

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]风工程四川省重点实验室,成都610031

出　　处：《武汉理工大学学报（交通科学与工程版）》2014年第3期637-640,644,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：为研究山区峡谷大跨度钢桁梁悬索桥的颤振稳定性及其气动性能优化措施,以某大跨度钢桁架梁悬索桥为工程背景,通过有限元计算分析及主梁节段模型风洞试验,研究其主梁颤振稳定性能.针对大桥颤振临界风速低于颤振检验风速,设计并试验对比了封闭桥面板中央开槽、中央上稳定板和中央下稳定板三种气动优化方案.试验结果表明,采用格栅板封闭桥面板中央开槽并设置中央下稳定板能有效提高大桥的颤振稳定性.In order to investigate the flutter stability and performance optimization of long-span steel truss suspension bridges in mountainous region,a long-span suspension bridge was taken as an engineering example in this paper.The flutter performance of the bridge was analyzed by finite element analysis and wind tunnel test of sectional model which shows that the flutter critical wind speeds were less than the flutter checking wind speed.The aerodynamic optimizers,sealing the central slot and central stabilizers,were designed and tested.The test results show that sealing the central slot with grating plate and installing central stabilizer inside the truss simultaneously can enhance the bridge＇s flutter performance obviously.

关 键 词：节段模型试验 桁架梁悬索桥 颤振稳定性 气动优化 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]