(40+56+40)m预应力混凝土连续槽形梁动力性能试验研究  

Experimental Study on Dynamic Performance of (40+56+40)m Prestressed Concrete Continuous Trough Girder

作　　者：董振升[1] 杨宜谦 张高翔 DONG Zhensheng;YANG Yiqian;ZHANG Gaoxiang(China Academy of Railway Sciences,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院,北京100081

出　　处：《铁道建筑》2018年第8期10-13,共4页Railway Engineering

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.

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 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]