液体黏滞阻尼器在乌锡线黄河特大桥中的应用研究

乌锡铁路黄河特大桥主桥的桥式方案为长联大跨混凝土连续箱梁结构,梁部质量巨大,主桥的地震设防为本项目技术关键。利用Midas/civil建立空间有限元模型,选用适合桥址处场地等级及地震特性的3条地震波,采用非线性时程分析方法检算在活动墩与主梁之间设置液体黏滞阻尼器装置的抗震效果。结论为:在活动墩与主梁之间设置液体黏滞阻尼器装置,有效协调各活动墩在动力作用下的参与工作,降低固定主墩地震力,有效提高主桥的地震设防标准。

Application and Research of Fluid Viscous Damper to Yellow River Extra-long Bridge on Wu-Xi Railway

The type of bridge structure for the main bridge of Yellow River extra-long bridge on Wu- Xi railway is a large cross-span continuous beam bridge with huge mass superstructure. The seismic fortification is the key technology of this project. In this paper,a spatial finite element model is built with Midas / civil and three seismic waves suitable for site grade and seismic characteristics of bridge site are selected. The anti-seismic effect of the fluid viscous damper device installed between the non-fixed pier and the main beam is calculated with nonlinear time history analysis method. By setting up fluid viscous damper between the non-fixed pier and the main girder,the non-fixed pier is effectively coordinated under the dynamic action,and the seismic force of the fixed pier is reduced. The seismic fortification standard of the main bridge is effectively improved.