吊杆损伤对外倾单肋式曲线钢拱桥自振特性的影响  

Influence of Suspender Damage on Free Vibration Characteristics of the Curved Steel Arch Bridge with Single Extroversive Rib

作　　者：金其莉 陈建兵[1] 尉洪利 汪一意 JIN Qili;CHEN Jianbing;YU Hongli;WANG Yiyi(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011;CCCC First Highway Two Engineering CO.,LTD.,Suzhou 215011)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215011 [2]中交一公局第二工程有限公司,江苏苏州215011

出　　处：《常州工学院学报》2018年第1期5-10,共6页Journal of Changzhou Institute of Technology

基　　金：苏州市住房和城乡建设局;财政局建设科研项目(sz201709)

摘　　要：为得到外倾单肋式曲线钢拱桥吊杆损伤对其结构动力特性的影响,以某人行钢拱桥为研究对象,采用Midas/Civil建立空间有限元模型,针对不同吊杆相同损伤程度或同一吊杆不同损伤程度对结构自振特性的影响进行了分析。分析结果表明:吊杆损伤降低了该桥梁结构的各阶自振频率,并具有自振频率降幅随吊杆损伤程度的增大而增加的特征,且结构第3阶自振频率的降幅受吊杆损伤影响程度最大。To understand the influence on the free vibration characteristics of the special-shaped-curved steel arch bridge with single extroversive rib caused by suspender damage,a finite element model has been established by using Midas/Civil based on a steel arch bridge.In view of the same degrees of damage in different suspenders and different degrees of damage in the same suspender,the effects on natural vibration characteristics are analyzed.The results show that natural frequency of the bridge is reduced due to the suspender damage.With the increase of the damage degree,natural vibration frequency decreases,and suspender damage influences most greatly on the third order natural frequency of the structure.

关 键 词：曲线钢拱桥 外倾单肋 吊杆损伤 自振特性 有限元分析 

分 类 号：U442.5[建筑科学—桥梁与隧道工程] U448.22[交通运输工程—道路与铁道工程]