长联大跨连续钢桁梁悬臂拼装全过程仿真研究  

Simulation Research on the Whole Process of Cantilever Erection of Long-connected Large-span Continuous Steel Truss Girders

作　　者：赵汗青 任为东 高静青 金令 王海彬[2] ZHAO Hanqing;REN Weidong;GAO Jingqing;JIN Ling;WANG Haibin(China Railway Engineering Design and Consulting Group Co.,Ltd.,Beijing 100055,China;The First Engineering Co.,Ltd.,China Railway Major Bridge Engineering Group Co.,Ltd.,Zhengzhou 450053,China)

机构地区：[1]中铁工程设计咨询集团有限公司,北京100055 [2]中铁大桥局集团第一工程有限公司,郑州450053

出　　处：《铁道标准设计》2021年第11期6-11,共6页Railway Standard Design

基　　金：中国中铁股份有限公司科技研究开发计划重大课题(2019-重大-01);中铁工程设计咨询集团有限公司科技开发项目(研2019-66)。

摘　　要：针对郑济铁路郑州黄河特大桥主桥(112+6×168+112)m连续钢桁梁,介绍悬臂拼装法的施工步骤。为了确保长联大跨连续钢桁梁在施工过程中的安全性,在Midas Civil软件中建立相应的有限元模型,模拟钢桁梁悬臂架设施工过程,进行长联大跨连续钢桁梁悬臂拼装全过程仿真研究。最后对重点施工阶段进行划分,找出最不利情况,并通过分析最不利情况下钢桁梁的受力情况以及进行横向抗倾覆验算,验证施工过程是否安全。结果表明,在钢桁梁悬臂架设过程中构件应力的最大值小于规范设计值,横向抗倾覆验算满足规范要求。For(112+6×168+112)m continuous steel truss girders of Zhengzhou Yellow River Bridge on Zhengzhou-Ji’nan High-speed Railway,the construction steps of cantilever assembly method are introduced.In order to ensure the safety of the long-span continuous steel truss girders in the construction process,the corresponding finite element model is established in the Midas Civil software to simulate the construction process of the cantilever erection of the steel truss girder,and the simulation of the whole process of cantilever assembly of long-span continuous steel truss girder is carried out.Finally,the key construction stages are divided to find out the most unfavorable condition.And then the safety of the construction process is verified by analyzing the stress condition of the steel truss girder under the most unfavorable condition and by checking the lateral anti-overturning.The results show that,during the cantilever erection of the steel truss girder,the maximum value of stress of the component is less than the standard design value,and the checking calculation of lateral anti-overturning meets the standard requirements.

关 键 词：公铁两用桥 连续钢桁梁桥 悬臂拼装法 应力 有限元分析 高速铁路 

分 类 号：U448.211[建筑科学—桥梁与隧道工程] U445.466[交通运输工程—道路与铁道工程]