高速铁路常用跨度桥梁动力设计方法  

Dynamic Design Method of High Speed Railway Bridge of Common Span

作　　者：张楠[1] 程泽农 ZHANG Nan;CHENG Zenong(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《中国铁路》2021年第9期67-72,共6页China Railway

摘　　要：高速铁路常用跨度桥梁在列车通过时具有显著的动力效应。在桥梁设计中,动力效应主要考虑基于实测数据的动力系数、移动荷载列分析以及车-线-桥动力耦合系统仿真等,但这3种形式各有其局限性。为提高桥梁动力设计的科学性和客观性,建议采用随机振动方法计算车-线-桥系统动力响应的数字特征,并通过具有概率意义的指标对计算结果进行评判。Given the significant dynamic effect at HSR bridges of common spans in the passing of trains,the paper notices that the three indicators widely applied in bridge design for dynamic analysis-namely dynamic coefficient based on measured data,the analysis of moving load sequence and the simulation of train-trackbridge dynamic coupling system-have their limits.To ensure scientific and object design,the paper recommends the random vibration method to calculate the characteristics of the dynamic response of train-trackbridge system,and to assess the calculation results by indicators with probability significance.

关 键 词：高速铁路 常用跨度桥梁 动力设计 动力系数 移动荷载列 车-线-桥动力耦合系统 

分 类 号：U442[建筑科学—桥梁与隧道工程]