【摘要】 以某大跨度斜拉桥实际工程为依托,研究大跨度斜拉桥线性粘滞阻尼器参数的不同选取对该桥抗震性能的影响。通过线性动力时程分析对线性粘滞阻尼器在大跨度斜拉桥中阻尼系数C进行参数敏感性分析,并与该桥在未设置线性粘滞阻尼器状态下的地震响应进行比较分析。结果表明:斜拉桥纵向设置粘滞阻尼器后,通过调节粘滞阻尼器的参数能有效降低结构在地震作用下关键部位的相对位移;可以有效的控制大跨度斜拉桥纵向位移,但是在高频区,竖向位移放大约为23%;同时也改善了结构构件的地震力响应并为同类工程粘滞阻尼器应用中的参数研究提供参考。更多还原

【Abstract】 The seismic behavior analysis of a long-span cable-stayed bridge will be conducted on a parameter of damping coefficient C of the linear viscous dampers through linear dynamic time-history analysis. Simultaneously,the results are compared with the seismic response without viscous dampers. The parameter sensitivity study indicates that setting dampers in longitudinal direction of bridge can reduce the relative displacement of key positions and the response of the bridge,the beneficial effect of the isolation in the longitudinal direction,but important amplification occurs in the vertical direction for relatively high frequency components. Moreover,the reference of application of linear viscous dampers will be provided for similar projects.更多还原