摘要
槽形梁因具有建筑高度低,结构轻巧,腹板可以隔音等优点,开始在高速铁路桥梁中应用。本文对比分析了(40+56+40)m连续槽形梁和(40+56+40)m连续箱形梁的自振特性,以及动车组以各种速度通过桥梁时的动力响应指标,包括梁端竖向转角、挠跨比、竖横向振幅、动应变及动力系数和竖向振动加速度。结果表明,连续槽形梁结构动力性能良好,能够适应高速列车运营的要求。
Trough girder has the advantages of low building height,light structure and sound insulation.It starts to be used in high speed railway bridge.In this paper,(40+56+40)m continuous trough girder and(40+56+40)m continuous box girder were compared and analyzed from the aspects of the natural vibration characteristics and dynamic response indexes,such as the vertical angel of the end of girder,the ratio of def lection to span,vertical and lateral vibration amplitude,dynamic strain and dynamic coeff icient,vertical vibration acceleration,when EMU pass through the bridge at various speeds.The results show that continuous trough girder structure has good dynamic performance and it can adapt to the operation of high speed trains.
作者
董振升
杨宜谦
张高翔
DONG Zhensheng;YANG Yiqian;ZHANG Gaoxiang(China Academy of Railway Sciences,Beijing 100081,China)
出处
《铁道建筑》
北大核心
2018年第8期10-13,共4页
Railway Engineering
关键词
铁路桥梁
动力性能
试验研究
连续槽形梁
自振频率
动力响应
Railway bridge
Dynamic performance
Experimental study
Continuous trough girder
Natural frequency
Dynamic response
