辅助墩对混合梁斜拉桥列车走形性影响分析  被引量:2

Analysis of the influence of auxiliary piers to the coupled vibration of vehicle and long span cable- stayed bridge with hybrid girder

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作  者:苗永抗[1] 郭向荣[2] 

机构地区:[1]铁道第三勘察设计院集团有限公司,天津300142 [2]中南大学土木工程学院,湖南长沙410075

出  处:《铁道科学与工程学报》2016年第5期876-881,共6页Journal of Railway Science and Engineering

摘  要:为探讨辅助墩的改变对钢混结合刚度及整桥列车走形性的影响。以某混合梁斜拉桥为例,根据弹性系统动力学总势能不变原理及行成矩阵的"对号入座"法则,建立车桥振动方程及分析模型。研究结果表明:辅助墩的改变对主梁竖向刚度影响较大,对列车各响应影响不明显,对钢混结合位置疲劳性能有着较为显著的影响,在设计时应予以重视。In order to explore the coupled vibration between cable-stayed bridge and the vehicle caused by aux-iliary piers,this paper took a cable-stayed bridge with hybrid girder as an example and presented a method to consider the small deformation of hybrid girder.According to the principle of conservation of total dynamic po-tential energy in elastic systems and the”setting in right position”rule for assembling system matrices,the coupled vibration equation and analysis model were established.The results show that auxiliary piers contribute more to increase the vertical stiffness of the whole bridge and have a smaller impact on the vehicle than the bridge.Meanwhile,auxiliary piers have a clear impact on fatigue performance,which should be paid more at-tention.

关 键 词:辅助墩 混合梁斜拉桥 车桥耦合 动力响应 

分 类 号:U441[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]

 

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