移动荷载作用下钢管拱桥动力特性分析  

Dynamic Characteristics Analysis of Steel Tube Arch Bridge under the Action of Moving Load

作　　者：张志却 谢凯 解文宗 李登国 卢彭真[2] Zhang Zhique;Xie Kai;Xie Wenzong;Li Dengguo;Lu Pengzhen(Jiaxing Xiuzhou Traffic Construction Investment Co.,Ltd.,Jiaxing 314000,China;Zhejiang University of Technology,Hangzhou 310013,China)

机构地区：[1]嘉兴市秀洲区交通建设投资有限责任公司,嘉兴市314000 [2]浙江工业大学,杭州市310013

出　　处：《北方交通》2021年第5期5-8,共4页Northern Communications

基　　金：浙江省交通科技项目(2018010)。

摘　　要：通过大型通用有限元软件ANSYS,对某一钢管混凝土拱桥进行数值模拟,通过改变其结构的部分参数,分析计算移动荷载作用对钢管拱桥动力特性的影响。研究结果表明:移动荷载作用时对桥梁结构动力性能的影响存在一个临界速度问题,当移动速度达到临界车速时,桥梁结构的振动幅度达到最大。提出为控制桥梁结构在移动荷载作用下的振动幅度,必须对车辆的行驶速度进行合理限制,该分析结果可为此类桥移动荷载作用下动力性能研究提供参考。The numerical simulation of a concrete-filled steel tube arch bridge is carried out by the large-scale general finite element software ANSYS.The influence of moving load on the dynamic characteristics of the steel tube arch bridge is analyzed and calculated by changing some structural parameters.The research results show that:there is a critical speed problem in the influence of moving load on the dynamic performance of bridge structure,and the vibration amplitude of bridge structure reaches the maximum when the moving speed reaches the critical speed.In order to control the vibration amplitude of bridge structure under the action of moving load,it is necessary to limit the running speed of vehicle reasonably.The analysis results can provide reference for the dynamic performance research of this kind of bridge under the action of moving load.

关 键 词：钢管拱桥 动力特性 自振频率 移动荷载 

分 类 号：U441[建筑科学—桥梁与隧道工程]