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交通运输工程学报
JOURNAL OF TRAFFIC AND TRANSPORTATION ENGINEERING
2006 Vol.6 No.2 P.26-29,34

数字化期刊

连续梁在行驶车辆作用下的动态反应

刘华  叶见曙  张涛 

摘 要:把桥梁和车辆看作两个分离体系,把车辆视为二维非线性模型,并考虑到桥面的路面不平度影响,应用虚功原理和模态叠加法分别建立振动方程,在车辆与桥梁接触点采用接触力和位移协调的条件,利用迭代技术求解二者之间的相互作用力.以一座三跨连续梁为例,计算了该桥的动挠度曲线和相应的冲击系数.结果显示车辆在边跨行驶时中跨跨中截面的冲击系数要远大于车辆在中跨行驶时的冲击系数,桥梁在车辆动荷载作用下的冲击系数与车辆动力特性、车速、桥梁动力特性以及路面不平度等密切相关,仅仅看作桥梁基频的函数是过于简化的.
关键词:桥梁工程;桥梁动态反应;模态叠加法;移动车辆荷载;冲击系数
分类号:U441.3 文献标识码:A

文章编号:1671-1637(2006)02-0026-04

Dynamic response of continuous girder bridge under moving vehicular loads

Liu Hua  Ye Jian-shu  Zhang Tao 

基金项目:江苏省交通科学研究计划项目(04Y051)
作者简介:刘华(1979-),男,安徽怀宁人,东南大学工学博士研究生,从事桥梁结构的振动、仿真分析和弯斜梁桥的稳定性研究. 86-25-83794206, kylinbridge@ 163.com;
作者简介:叶见曙(1948-),男,湖北武汉人,东南大学教授.导师,86-25-83794206, yejianshu@seu. edu. cn.
作者单位:刘华(东南大学,交通学院,江苏,南京,210096) 
     叶见曙(东南大学,交通学院,江苏,南京,210096) 
     张涛(中南航空港建设公司,湖南,衡阳,421001) 

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收稿日期:2005年8月2日

出版日期:2006年6月30日

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