蒙华铁路洛河钢管砼拱桥拱肋吊装中的扣锚索索力计算  

Calculation of Buckle Anchor Cable Force in Arch Rib Erection of Luohe Concrete Filled Steel Tube Arch Bridge in Inner Mongolia-Jiangxi Railway

作　　者：蒋平江[1] 雷建华 Jiang Pingjiang;Lei Jianhua(Shaanxi Railway Institute,Weinan 714000,China;Railway Group 5 Mechanization of Engineering Limited Liability Company,Hengyang 421000,China)

机构地区：[1]陕西铁路工程职业技术学院,陕西渭南714000 [2]中铁五局集团机械化工程公司,湖南衡阳421000

出　　处：《甘肃科学学报》2018年第5期89-94,共6页Journal of Gansu Sciences

基　　金：国家重点基础研究发展计划(973计划)(2014CB046906);陕西省教育厅专项科研课题(17JK0168)

摘　　要：采用缆索吊和扣锚系统进行拱肋节段施工的大跨度钢管砼拱桥,一般通过扣索来维持拱肋结构的平衡并利用扣索调整拱形,精确计算扣索索力是保证施工质量和安全的关键。研究以蒙华铁路洛河钢管砼拱桥缆索吊+扣锚系统施工为工程背景,运用MIDAS/Civil及ANSYS结构分析软件对拱肋吊装施工进行有限元模拟分析,利用优化原理,采用正装迭代一次定位法计算各安装节段的索力,通过计算组合工况下的扣锚索力与初始计算的扣锚索力进行比较验证。实践证明此方法计算精度较高,保证了拱肋节段吊装施工的质量和安全。Generally, the long-span concrete filled steel tube arch bridge with the cable hoisting system and the buckle anchor system in the arch rib segment maintains the balance of the arch rib structure and adjusts the arch with the buckle cable. The accurate calculation of the buckle cable force is the key to ensure the construction quality and safety. This paper utilizes MIDAS/Civil and ANSYS structure analysis software to carry out the finite element analysis and simulation by taking the construction of the cable hoisting system＋buckle anchor system for the Luohe concrete filled steel tube arch bridge of Inner Mongolia-Jiangxi Railway as the engineering background. The primary positioning method with positive iteration is used to calculate the cable force of each installation segment by using the optimization principle. Through the comparison and verification of the buckle anchor force under the combined working condition and the initially calculated buckle anchor cable force, it is proved that the calculation accuracy of such method is high, which ensures the quality and safety of the hoisting construction in the arch rib segment.

关 键 词：钢管混凝土拱桥 缆索吊装 扣锚索索力 优化计算 

分 类 号：U445[建筑科学—桥梁与隧道工程]