铁路简支梁桥竖向有载频率研究  

study on vertical loaded frequencies of railway simply supported beam bridges

作　　者：苏木标[1] 李建中[2] 梁志广[1] 

机构地区：[1]石家庄铁道学院交通工程系,河北石家庄050043 [2]同济大学桥梁系,上海200092

出　　处：《铁道学报》2001年第2期76-80,共5页Journal of the China Railway Society

基　　金：铁道部科技发展计划资助项目!(96G1 9- A)

摘　　要：采用车 -桥系统相互作用的计算模型 ,对不同跨度简支梁桥的竖向有载自振频率进行了深入研究。结果表明 ,桥梁的竖向有载自振频率在列车过桥全过程中是周期性变化的 ,其数值不仅与桥梁本身的刚度和质量分布有关 ,同时还与桥上车辆各轮对悬挂弹簧的刚度和簧下质量及其在桥上的位置有关。The vertical loaded free frequencies for the different span simply supported beam bridges are investigated with the vehicle bridge system model. The results show that these frequencies of the bridge are periodic changed in all the process in which a train moves on the bridge, and the values of the frequencies have the relation with not only the distribution of the stiffness and the mass of the bridge self, but also the stiffness of the spring and the mass under the spring for each wheel set of the vehicles running on the bridge.

关 键 词：车-桥系统 竖向振动 有载自振频率 铁路桥 简支梁桥 

分 类 号：U448.13[建筑科学—桥梁与隧道工程]