大跨度桥梁风致侧向抖振混合控制

英文篇名：Mixed control of wind-induced lateral buffeting from long-span bridges
中文刊名：华中科技大学学报(自然科学版)
英文刊名：Journal of Huazhong University of Science and Technology(Natural Science Edition)
作者：徐家云 ; 曲宪伟 ; 王雄江 ; 陈吉
英文作者：Xu Jiayun1a Qu Xianwei2 Wang Xiongjiang1b Chen Ji1a(1 a Hubei Key Laboratory of Road Bridge and Structure Engineering ; b Department of Civil Engineering and Architecture ; Wuhan University of Technology ; Wuhan 430074 ; China ; 2 Chinese Architecture Northeast Design and Research Institute ; Shenyang 110006 ; China)
中文关键词：桥梁抗风 ; 侧向抖振 ; 黏滞阻尼器 ; 调谐质量阻尼器 ; 混合控制
英文关键词：bridge wind-resistance ; lateral buffeting ; visvous damper(VD) ; tunde mass demper(TMD) ; mixed control
出版日期：2011-11-23
机构：武汉理工大学道路桥梁与结构工程湖北省重点试验室;中国建筑东北设计研究院;武汉理工大学土木工程与建筑学院;
年：2011
期：11
出版单位：华中科技大学学报(自然科学版)

摘要

提出在桥塔和主梁之间安装6个粘滞阻尼器(VD)及在主梁跨中2箱中各设置9个侧向调谐质量阻尼器(TMD)的混合控制系统来控制桥梁侧向抖振响应的方案.以某大跨度桥梁为例建立三维空间有限元模型,利用谐波合成法模拟桥梁脉动风荷载,通过与无控结构、仅安装VD结构、仅安装TMD结构的桥梁有限元模型进行了对比分析,结果表明:在侧向风力的强迫作用下,桥面侧向抖振响应不可忽略;混合系统控制下,位移与加速度根方差降幅分别为66.5%和61.1%.
A mixed control system,including six visvous dampers(VD) installed between the tower and main beam of the bridge and 9 lateral TMD installed in the two boxes in the main beam span,was proposed to resolve the problem of the wind-induced lateral buffeting of bridges.A three-dimensional finite element model based on an example of a long-span bridge was built,and the harmonic synthesis simulation was used to simulate the wind loads for bridges.By conducting a comparative analysis and calculation of the finite element models with no control structure,VD structure,TMD structure.The results show that the lateral buffeting of the bridge deck is rather serious.Moreover,under the control of mixed systems,the decline numbers of displacement and root variance of acceleration are 66.5% and 61.1%.

引文

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