【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%.更多还原

【Abstract】 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%.更多还原