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为确定确定强震山区悬索桥阻尼器参数,本文以龙江长江大桥为研究对象,建立了有限元分析模型,选取了7种阻尼系数和6种速度指数共42种阻尼器参数进行非线性时程分析,对阻尼器参数变化对结构地震响应的影响进行了分析。结果表明:对于大跨度悬索桥,黏滞阻尼器能够有效的降低地震作用下主梁位移响,而对结构内力影响很小此外阻尼器的设置尚应兼顾阻尼器的最大阻尼力和变形。
In order to determine the damper parameters of suspension bridge in strong mountain area, this paper takes the Longjiang Yangtze River Bridge as the research object and establishes a finite element analysis model. Totally 42 kinds of damper parameters including 7 kinds of damping coefficient and 6 kinds of speed indexes are selected for nonlinear time history The influence of the change of damper parameters on the seismic response of the structure is analyzed. The results show that viscous dampers can effectively reduce the displacement of the main girder under earthquake and have little effect on the structural internal forces of long-span suspension bridges. In addition, the dampers should take into account the maximum damping force and deformation of the dampers.