【摘要】 高速铁路桥梁作为高速铁路的重要组成部分,其动力特性直接影响高速列车运行的安全性。本文基于我国高速铁路高架桥梁常用结构形式的实际数据,运用Midas/Civil软件建立高速铁路桥梁的典型结构形式,即多跨简支梁桥的全桥模型,建立了14个计算工况下的桥梁模型,选择不同场地及频谱特性的地震波30条,通过时程分析方法得到桥梁横桥向动力响应放大系数420个,经过统计分析给出了放大系数95%的概率保证值,并检验了动力放大系数的概率分布特征。更多还原

【Abstract】 The dynamic characteristics of high-speed railway viaduct,as an important part of high-speed railway system,directly affect the safety of high-speed train. In this paper,based on the actual physical data of typical structure of high-speed railway viaduct,a large amount of calculation is carried on by finite element analysis method. All the 14 3-D finite element models with different type structures of high-speed railway viaduct are built by the Midas / Civil program. And 30 earthquake records which represent different types of soil conditions and frequency characters are selected as input excitations. Finally the 420 dynamic amplification factors are present and the 95%assurance probability of these values is given,and the probability distribution character of the dynamic amplification factors is studied.更多还原