公路连续梁桥冲击系数的探讨  

Discussion on the continuous girder bridges impact coefficient on highway

作　　者：张元文[1] 姜长宇[2] 

机构地区：[1]江苏省交通科学研究院 [2]东南大学建筑设计研究院

出　　处：《山西建筑》2008年第14期347-348,共2页Shanxi Architecture

摘　　要：通过建立四座三跨连续梁桥在移动车辆荷载作用下的有限元模型,给模型赋不同的参数,研究了连续梁桥自振频率和车辆自振频率对车辆冲击效应的影响,分析表明,对于连续梁桥的冲击系数,除了基频对其有影响外,桥梁第二阶、第三阶频率以及车辆自身的动力特性对其也有影响。Through establishing the finite element model of four three-span continuous girder bridges effected by the moving vehicular loads, analyzes that influence which the natural frequency of the three-span continuous girder bridges and the vehicles have on the vehicle dashing effect, the analysis shows that the second-order frequency and the third-order frequency of the bridges, the dynamic characteristics of the vehicles have the effect on the continuous girder bridges impact coefficient besides the effect caused by fundamental frequency.

关 键 词：有限元模型 自振频率 动力特性 

分 类 号：U441[建筑科学—桥梁与隧道工程]