混合梁斜拉桥合理索力及施工索力计算分析  

Calculation and Analysis of Reasonable Cable Force and ConstructionCable Force of Hybrid Girder Cable-stayed Bridge

作　　者：杨炎炎 王安东[1] YANG Yan-yan;WANG An-dong(School ofTiecheng(Innovation),Shaanxi Railway Institute,Weinan Shaanxi 714000,China)

机构地区：[1]陕西铁路工程职业技术学院铁成(创新)学院,陕西渭南714000

出　　处：《兰州工业学院学报》2021年第3期17-20,共4页Journal of Lanzhou Institute of Technology

摘　　要：以某混合梁斜拉桥为研究背景,采用Midas Civil有限元分析软件并利用改进的零位移法确定斜拉桥合理索力,根据正装迭代法对斜拉桥进行分阶段施工模拟分析,得到按一定顺序分2次张拉后斜拉索在成桥状态的索力值.结果表明:成桥索力能够较高程度地与合理索力符合,在设计施工工序下按照该组张拉索力值能够使斜拉桥成桥索力满足设计要求.对同类桥型斜拉索索力设计值的选取及施工张拉索力的确定有借鉴意义.Taking a hybrid girder cable-stayed bridge as the research background,Midas Civil finite element a-nalysis software is adopted and the improved zero displacement method are used to determine the reasonable cable force of the cable-stayed bridge.According to the forward iteration method,the simulation analysis of the cable-stayed bridge construction in stages is carried out,and the cable force value of the cable in the completed bridge state after being tensioned twice in a certain order is obtained.The results show that the cable force of the com-pleted bridge can be in line with the reasonable cable force to a high extent,and the cable force can be calculat-ed according to this group of cable forces in the design and construction process that can make the finished cable force of cable-stayed bridge meet the design requirements.It can be used for reference in the selection of design value of cable force and the determination of construction tension cable force of the same type of bridge.

关 键 词：混合梁斜拉桥 有限元分析 索力 零位移法 正装迭代法 

分 类 号：U445[建筑科学—桥梁与隧道工程]