摘要
针对无背索斜拉桥吊装施工吊装难度大问题,首先采用理论计算的方法对无背索斜拉桥吊具进行选取;采用midas Civil软件建立主桥及索塔安装临时支墩的有限元模型,对临时支墩各个构件的应力、变形及稳定性进行有限元分析;基于工程特点,提出了吊装施工方案。结果表明:无背索斜拉桥吊装施工过程中,主桥与索塔临时支墩构件的最大应力分别为75.0 MPa、70.0 MPa,均小于试件的抗拉强度设计值145 MPa;临时支墩的各构件变形均小于规范限值,主桥与索塔临时支墩设计满足工程需求。
Aiming at the difficulty of hoisting of cable-stayed bridge without back cable,the method of theoretical calculation is used to select the hoisting device of cable-stayed bridge without back cable.The element model is used to analyze the stress,deformation and stability of each component of the temporary pier.Based on the characteristics of the project,a hoisting construction plan is proposed.The results show that:during the hoisting construction of the cable-stayed bridge without back-cable,the maximum stress of the temporary buttress members of the main bridge and the cable tower are 75.0 MPa and 70.0 MPa respectively,which are both lower than the design value of the tensile strength of the specimen,which is 145 MPa;The deformation of each member is less than the specification limit.The design of the temporary buttresses of the main bridge and the cable tower meets the engineering requirements.
作者
胡成明
HU Cheng-ming(China Railway 22nd Bureau Group Co.,Ltd.,Harbin,Heilongjiang 150000,China)
出处
《黑龙江交通科技》
2022年第4期118-120,123,共4页
Communications Science and Technology Heilongjiang
关键词
无背索斜拉桥
吊装施工
有限元模型
cable-stayed bridge without back cable
hoisting construction
finite element model
