斜拉桥拉索损伤对桥梁结构静力特性的影响分析  

Analysis of Influence of Cable Damage on Static Characteristics of Bridge Structure

作　　者：严超群[1] 穆江飞 YAN Chao-qun;MU Jiang-fei(School of Transportation and Geomatics Engineering,Yangling Vocational and Technical College,Yangling,Shaanxi 712100,China)

机构地区：[1]杨凌职业技术学院交通与测绘工程学院,陕西杨凌712100

出　　处：《杨凌职业技术学院学报》2022年第4期5-8,34,共5页Journal of Yangling Vocational & Technical College

基　　金：杨凌职业技术学院院内基金项目(SK21-08)。

摘　　要：以某双塔三跨预应力混凝土斜拉桥为例,利用有限元软件Midas/Civil进行数值分析,研究了拉索损伤对桥梁结构静力特性的影响。研究表明:相同程度损伤情况下不同位置拉索损伤后,边跨长索损伤对主梁线形和拉索索力影响最为明显,中索和短索的损伤对二者的影响相对较小;不对称边跨拉索损伤只对本侧拉索索力及主梁线形有影响,对异侧结构状态基本无影响;相同位置情况下拉索不同程度损伤对主梁线形和拉索索力呈相似规律性影响变化,主梁线形随损伤程度的增加而增大,拉索索力随损伤程度的增加而减小。In this paper,a two-tower three-span prestressed concrete cable-stayed bridge is taken as an example,and numerical analysis is carried out by using finite element software Midas/Civil to study the influence of cable damage on the static characteristics of the bridge structure.The results show that under the condition of same damage degree and cable damage of different position,the long cable damage of side span has the most obvious influence on the alignment and cable force of main girder,while the damage of middle cable and short cable has relatively little influence on them.The damage of asymmetrical side span cable only affects the cable force and girder alignment on the side,but has no effect on the structural state on the other side.At the same position,the cable damage of different degrees has similar regular influence on the line shape and cable force of the main beam.The line shape of the main beam increases with the increase of the damage degree,and the cable force decreases with the increase of the damage degree.

关 键 词：斜拉桥 拉索损伤 主梁线形 索力 

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]