粘滞阻尼器在自锚式悬索桥中的减隔震应用研究

该文以广州猎德大桥振动台试验为实际工程背景,研究了非线性粘滞阻尼器对该桥抗震性能的影响。对非线性粘滞阻尼器的两个参数即阻尼系数C和阻尼指数ξ进行了参数敏感性分析研究,确定了纵向粘滞阻尼器的合理参数;并按照相似比制作了粘滞阻尼器模型,安装于1∶60猎德大桥全三维缩尺模型上,进行了全桥振动台试验。研究结果表明,通过选择适当的粘滞阻尼器的参数,可以有效降低结构在地震作用下关键部位的相对位移,同时也改善了结构构件的地震力。

Study on Viscous Damper for Seismically Isolating Application in Self-anchored Suspension Bridge

Taking the vibrating bench test of Guangzhou Liede Bridge as the practical engineering background,the article studies the influence of viscous damper on the aseismic behavior of this bridge.The article carries out the analysis and study of parameter sensitivity for two parameters,i.e.damping parameter C and damping index ξ of non-linear viscous damper,determines the reasonable parameter of longitudinal viscous damper.According to the similar proportion,the viscous damper model is made,and is installed on 1:60 Liede Bridge full three-dimensional scaled model to implement the vibrating bench test of the whole bridge.The study result makes clear that it can be efficiently to reduce the relative displacement of the key parts of the structure under the earthquake action by selecting the proper parameter of viscous damper,at the same time,is also to improve the earthquake force of structure member.