【摘要】 以杭州钱江铁路新桥主桥(45+65+14×80+65+45)m预应力混凝土连续箱梁为工程背景,利用有限元软件Midas/civil建立有限元模型。采用非线性时程分析方法计算设置粘滞性阻尼器前后墩底反力和墩顶位移的变化,从而评价粘滞性阻尼器对提升桥梁抗震性能的作用。结果表明:粘滞性阻尼器的合理设置可以减小制动墩内力,提升高速铁路长联大跨连续梁的抗震性能。更多还原

【Abstract】 A dynamic finite element model was built using the finite element software Midas/civil with the new Hangzhou Qianjiang Railway Bridge as the practical engineering example,which has a main bridge of(45+65+14×80+65+45) m prestressed concrete continuous girder.A non-linear dynamic time-history analysis method was used to calculate and compare the internal forces of the pier bottom and the displacements of the pier top before and after the setup of viscous dampers with the viscous dampers’ impact on the seismic performance then evaluated.The results show that the force of the fixed pier can be significantly reduced via reasonable setup of viscous dampers,which leads to improvement of seismic performance of a long-spanned and long-unit continuous girder bridge on high speed railway.更多还原