附加阻尼器对超大跨度斜拉桥的减震效果

Seismic Response Reduction of a Super-Long-Span Cable-Stayed Bridge by Adding Dampers

基于流体粘滞阻尼器自身的力学特性,分析了附加流体粘滞阻尼器对超大跨度斜拉桥的减震效果,着重分析了阻尼器参数、输入地震动特性(加速度峰值和频谱特性)对减震效果的影响.结果表明,流体粘滞阻尼器能显著地减小梁端纵向位移,减震效果取决于阻尼器参数,并对地震动特性很敏感.

In the paper, the mechanical characteristics of fluid viscous dampers are discussed firstly, and then the seismic response reduction of a super-long-span cable-stayed bridge by adding fluid viscous dampers is investigated. The emphasis is placed on the influence of damper parameters, peak acceleration and spectrum shape of earthquake excitations. The investigation indicates that adding fluid viscous dampers can significantly reduce the girder movements, and the reduction depends on damper parameters. The fluid viscous dampers are sensitive to characteristics of input earthquake motions.