铁路双线连续钢桁梁桥竖向有载自振频率影响因素分析.PDFVIP

·桥摇 梁· 铁铁路双线连续钢桁梁桥竖向有载自振 频率影响因素分析 1 2 3 任剑莹 , 苏木标 , 李文平 (1. 石家庄铁道大学工程力学系, 石家庄摇 050043;2. 石家庄铁道大学大型结构健康诊断与 控制研究所, 石家庄摇 050043; 3郾 石家庄铁道大学土木工程学院, 石家庄摇 050043) 摘摇 要:研究车辆参数和列车行车速度对车 桥系统竖向有载自振频率的影响情况。 采用车 桥系统相互作用的计 算模型,分别改变车辆参数和列车行车速度,计算铁路双线连续钢桁梁桥的竖向有载自振频率的变化情况。 结果 表明:车辆参数对桥梁竖向有载自振频率有一定影响,而桥梁竖向有载自振频率与行车速度无关。 关键词:双线连续钢桁梁桥; 车 桥系统; 竖向有载自振频率; 车辆参数 中图分类号:U448郾217;U311郾3摇 摇 文献标识码:A摇 摇 文章编号:1004 2954(2012)08 0032 04 Influence factors on Vertical Load鄄Carrying Natural Frequency of Railway Double鄄Track Continuous Steel Truss Girder Bridge 1 2 3 RENJian鄄ying ,SU Mu鄄biao ,LI Wen鄄ping (1.Department of Engineering Mechanics,Shijiazhuang Tiedao University,Shijiazhuang050043,China;2.Structural Health Monitoring and Control Institute,Shijiazhuang Tiedao University,Shijiazhuang050043,China; 3.School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang050043,China) Abstract:The article researches into the influences of vehicle parameters and the train speed on the vehicle鄄bridge system蒺s vertical load鄄carrying natural frequency. Using the interactional vehicle鄄bridge system model,when the vehicle parameters and the train speed are respectively changed,the changed value of vertical load鄄carrying natural frequency in railway double鄄track continuous steel truss girder bridge is calculated. The results show that the bridge蒺s vertical load鄄carrying natural frequency is impacted by the vehicle parameters,but it is independent of the train speed. Key words: double鄄track continuous steel truss girder bridge; vehicle鄄bridge system; vertical load鄄