摘要
以润扬长江公路大桥南汊悬索桥(润扬悬索桥)为研究对象,首先基于ANSYS建立了该桥的三维有限元计算模型,同时基于桥址区实测风特性建立了该桥考虑桥塔风效应的三维脉动风场,在此基础上进行了该桥非线性抖振响应时域分析,重点研究了桥塔风效应对大跨度悬索桥风致抖振响应的影响。研究结果表明,主塔风效应对大跨度悬索桥主梁抖振响应的影响很小。就主塔而言,其顺桥向抖振响应受桥塔风效应的影响也很小,但横桥向抖振响应在考虑桥塔风效应时显著增加,在进行抖振响应分析时不容忽视。研究结果对大跨度悬索桥的风致抖振分析具有参考价值。
The Runyang Suspension Bridge (RSB) crossing the Yangtse River in China was taken as the research object.The spatial finite element model of the RSB was established with program ANSYS and the 3-dimensional turbulence wind field considering the tower wind effect was simulated based on the measurement of wind characteristics on some bridge spot.The nonlinear buffeting response was then analysed in time domain and the bridge tower wind effects on wind-induced buffeting response of long-span suspension bridge were specially studied.The analysis results show that the wind effects of the bridge tower have little influence on buffeting response of the main girder of long-span suspension bridges and also have little influence on along-bridge buffeting response of the main towers.However,the traverse buffeting response of the main towers increases greatly if the wind effects of the bridge towers are considered,so,the wind effects can not be neglected.The results are of reference values for wind-induced buffeting response analysis of long-span suspension bridges.
出处
《振动与冲击》
EI
CSCD
北大核心
2010年第8期103-106,123,共5页
Journal of Vibration and Shock
基金
国家自然科学基金项目(50978056)
国家自然科学基金青年基金资助项目(50908046)
国家杰出青年基金项目(50725828)
国家教育部博士点基金资助项目(200802861012)
关键词
悬索桥
抖振响应
桥塔
风效应
时域分析
suspension bridge
buffeting response
bridge tower
wind effect
time-domain analysis
