桥塔风效应对大跨度悬索桥抖振响应的影响

王浩;李爱群;;焦常科

振动与冲击 ›› 2010, Vol. 29 ›› Issue (8) : 103-106,.

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振动与冲击 ›› 2010, Vol. 29 ›› Issue (8) : 103-106,.
论文

桥塔风效应对大跨度悬索桥抖振响应的影响

  • 王浩1,2; 李爱群1,2 ; 焦常科
作者信息 +

Bridge Tower Wind Effects on Buffeting Response of Long-span Suspension Bridges

  • WANG Hao1,2; LI Ai-qun1,2; JIAO Chang ke
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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。

Abstract

The Runyang Suspension Bridge (RSB) crossing the Yangtse River in China was taken as teh 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 buffeting response of the main towers. However, the traverse-bridge buffeting response of the main towers increases greatly if the wind effects of the bridge tower 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.

关键词

悬索桥 / 抖振响应 / 桥塔 / 风效应 / 时域分析

Key words

suspension bridge / buffeting response / bridge tower / wind effect / time-domain analysis

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导出引用
王浩;李爱群;;焦常科. 桥塔风效应对大跨度悬索桥抖振响应的影响[J]. 振动与冲击, 2010, 29(8): 103-106,
WANG Hao;LI Ai-qun;JIAO Chang ke. Bridge Tower Wind Effects on Buffeting Response of Long-span Suspension Bridges[J]. Journal of Vibration and Shock, 2010, 29(8): 103-106,

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