铁路钢桥疲劳多线系数研究

我国的铁路桥梁已从单线逐步发展到双线。近年来为适应铁路事业的蓬勃发展,满足日益增长的运输需求,同时为节约航道资源,一桥多线的铁路钢桥形式逐步出现,并将成为发展的主流。而我国的TB10002.2-99《铁路桥梁钢结构设计规范》中对钢桥疲劳设计仅有双线系数的取值规定,通过对多线系数计算方法的研究以及对已有多线桥梁多线系数的计算分析,得出影响多线系数大小的因素,为今后制定统一的多线系数取值方法提供初步研究基础资料。

RESEARCH ON THE FATIGUE MULTIPLE TRACK COEFFICIENT OF RAILWAY STEEL BRIDGE

The railway bridge with double track was developed from the single track.With the development of society and the increasingly augment on carrying capacity of railway in our country , one bridge with multiple track will be the main trend in the future.There is only double track coefficient prescribed in Chinese railway bridge design code , so it is necessary to update the multiple track coefficient.This paper discusses the research work that involved a series of analyses and calculations of multiple track coefficient , and the factors influencing multiple track coefficient are also obtained.The research work provides the study foundation for updating the multiple track coefficient in code in the future.