静风荷载作用下特大跨钢管混凝土拱桥施工阶段的稳定性分析  

Stability analysis of long-span concrete-filled steel tube arch bridge under static wind load

作　　者：曾勇[1,2] 莫磊 ZENG Yong;MO Lei(State Key Laboratory of Mountain Bridge&Tunnel Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Center for Mountain Bridge Structure&Materials Engineering Research,Ministry of Education,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学山区桥梁及隧道工程省部共建国家重点实验室,重庆400074 [2]重庆交通大学山区桥梁结构与材料教育部工程研究中心,重庆400074

出　　处：《河南城建学院学报》2022年第3期1-7,共7页Journal of Henan University of Urban Construction

基　　金：重庆市留学人员回国创业创新支持基金(cx2018113,cx2020117);山区桥梁结构与材料教育部工程研究中心开放基金资助项目(QLGCZX-JJ2017-5);山区桥梁及隧道工程国家重点实验室开放基金(CQSLBF-Y14-3,CQSLBF-Y16-10)。

摘　　要：以施工阶段合江长江大桥主桥530 m中承式钢管混凝土拱桥为研究对象,在综合考虑了几何非线性、荷载非线性等因素后,对其施工过程中拱肋吊装的最大悬臂阶段(未加最后两片横撑)的空气静力稳定性进行了分析研究。利用ANSYS有限元软件建立了塔-索-梁一体化有限元分析模型,对半跨模型(未加最后两片横撑)进行了最大悬臂状态的静力分析和稳定分析。分析计算结果表明:横桥向结构的最大位移为1.72 m,最大位移发生在拱顶;在肋吊装的最大悬臂阶段,塔-索-梁结构体系满足位移和稳定性要求。Taking the construction of the main bridge of Hejiang Yangtze River No.1 Bridge 530m half-through concrete-filled steel tube arch bridge as the background,after comprehensively considering geometric,load and other nonlinear factors,the arch ribs during the construction process.The aerostatic stability of the maximum cantilever stage of hoisting(without the last two cross braces)was studied and analyzed.Using the finite element analysis program ANSYS,the tower-cable-beam integrated finite element analysis model was established,and the static analysis and stability analysis of the maximum cantilever state were performed on the half-span model(without the last two cross braces).The analysis and calculation results show that the maximum displacement in the transverse direction is 1.72 m,and the maximum displacement occurs at the vault;in the maximum cantilever stage of the rib hoisting,the tower-cable-beam structure system meets the requirements of displacement and stability.

关 键 词：钢管混凝土拱桥 塔-索-拱 最大悬臂 位移 稳定性 

分 类 号：U448[建筑科学—桥梁与隧道工程]