摘要
动载系数是开展轨道结构部件设计的重要依据,其计算方法和最终取值很大程度上依赖工程实践经验。本文对国内外铁路轨道结构动载系数的计算方法和取值进行了汇总和对比分析。结果表明:国内外动载系数计算表达式均与列车运行速度有直接关系,其取值通常参考轨道部件的实际服役状态,并结合运营维护管理经验不断完善,从而为后续优化设计提供条件;中国铁路轨道结构设计过程中动载系数通常取2.5~3.0,以保证轨道结构部件具有足够强度和耐久性。
Dynamic load coefficient is an important basis for the design of track structural components,and its calculation method and final value largely rely on engineering practice experience.This paper summarized and compared the calculation methods and values of dynamic load coefficient of railway track structure at home and abroad.The results show that the calculation expressions of dynamic load coefficient at home and abroad are directly related to the train running speed.Its value usually refers to the actual service state of track components,and is continuously improved in combination with the operation,maintenance and management experience,so as to provide conditions for subsequent optimization design.In the process of railway track structure design in China,the dynamic load coefficient is usually 2.5~3.0 to ensure the sufficient strength and durability of track structure components.
作者
梁晨
司道林
刘浩
LIANG Chen;SI Daolin;LIU Hao(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;State Key Laboratory for Track Technology of High-speed Railway,Beijing 100081,China)
出处
《铁道建筑》
北大核心
2021年第10期100-103,共4页
Railway Engineering
基金
国家自然科学基金(52008395)
中国铁道科学研究院集团有限公司基金(2020YJ048)。
关键词
轨道结构
动载系数
计算方法
列车运行速度
线路状态
track structure
dynamic load coefficient
calculation method
train running speed
track status
