【摘要】 金水沟特大桥为黄韩侯铁路线上的一座高墩大跨刚构连续梁桥,对其进行抗震分析后发现,地震力控制桥梁的设计。为减小其地震反应,在金水沟特大桥上设置液体粘滞阻尼器。采用动力非线性时程分析方法,对非线性粘滞阻尼器的阻尼系数和阻尼指数进行参数敏感性分析,研究不同阻尼器参数对减震效果的影响,并与不设阻尼器情况的地震响应结果进行比较。分析表明,在金水沟特大桥上设置粘滞阻尼器后,可以有效地降低结构关键部位在地震作用下的位移,减小结构构件的地震力,确保结构在地震下的安全。更多还原

【Abstract】 Jinshuigou Bridge is a continuous rigid frame girder bridge with high piers in Huanghanhou Railway.The results of seismic analysis on it showed that the bridge design was dominated by the earthquake force.So,fluid viscous dampers were set on the bridge to control the seismic responses.In the paper,the sensitivity analysis of damping coefficient and damping exponent of fluid viscous damper are performed by using nonlinear dynamic time-history method,and the shock absorption effects from different damper parameters are discussed in contrast with that of cases without the damper.It indicates that setting the viscous damper in Jinshuigou Bridge could reduce efficiently the displacement of key positions as well as the seismic response of the bridge,and so could ensure the safety of the structure under earthquake.更多还原