30t轴重重载货车作用下常用跨度预应力混凝土简支梁动力响应的试验分析  

Experimental analysis on dynamic response of common span prestressed concrete simply-supported girder under loading of 30 t axle load freight train

作　　者：蔡超勋[1] 刘吉元[1] 肖祥淋[1] 胡所亭[1] 苏永华[1] 

机构地区：[1]中国铁道科学研究院铁道建筑研究所,北京100081

出　　处：《铁道建筑》2015年第1期1-6,共6页Railway Engineering

基　　金：国家科技支撑计划项目(2013BAG20B00)

摘　　要：对朔黄铁路线上7座常用跨度预应力混凝土简支梁桥,在30 t轴重重载货车作用下梁体的动力响应进行了实测,取得了大量数据。通过分析得到以下结论:实测梁体动力响应均在通常值范围内,满足安全限值要求;实测梁体挠度、应变与大轴重列车加载效应直接相关,实测值与轴重等级呈线性增长趋势,而梁体竖、横向振幅及加速度与列车轴重关系不明显;实测结果验证部分和理论分析成果为大轴重重载技术研究提供了数据支持,试验数据的处理方法可为类似试验提供参考。The dynamic responses of the seven common-span prestressed concrete bridges under 30 t Axle Load Freight were measured in Shuozhou-Huanghuagang Railway.Through the test and analysis,conclusions can be drawn as follows.The measured dynamic responses of the griders were within the range of the Ordinary-Values,and comformed to the Limit Values for the traffic safety.The measured deflection and strain of the griders were directly related to the effect of the 30 t axle load.Either the vertical or the lateral amplitude and acceleration was not signif icantly related to the effect of the 30 t axle load.The measured results and the theoretical analysis can be used to study the heavy haul technology with large axle load,and the method of data processing can be applied to other similar tests.

关 键 词：30t轴重 重载货车 铁路桥梁 动力响应 测试分析 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]