基于精细化建模的多跨连续刚构桥悬臂施工控制有限元分析  

Finite element analysis of cantilever construction control of multi-span continuous rigid frame bridge based on fine modeling

作　　者：唐鹏[1] TANG Peng(Anhui Technical College of Water Resources and Hydroelectric Power,Hefei 231603,China)

机构地区：[1]安徽水利水电职业技术学院,安徽合肥231603

出　　处：《安徽水利水电职业技术学院学报》2024年第5期50-55,共6页Journal of Anhui Technical College of Water Resources and Hydroelectric Power

基　　金：安徽省教育厅高校自然科学研究重点项目(2024AH050566)。

摘　　要：连续刚构桥在悬臂浇筑施工中,由于结构体系随着施工进程而不断变化,导致结构的受力和变形变化幅度较大。为确保多跨连续刚构桥顺利合龙且应力状态满足设计要求,需对施工中结构状态进行分析。以马金任河特大桥主桥为工程背景,通过建立精细化的有限元模型并计算分析了各施工阶段桥梁的结构参数指标,获得了主梁的内力状态及施工预变形值,结果表明:成桥后桥梁结构的受力状态与目标一致,该控制方法的实际应用效果良好,可以为其他类似工程提供一定的借鉴。In the cantilever casting construction of continuous rigid frame bridge,the structural system changes constantly with the construction process,resulting in large changes in the force and deformation of the structure.In order to ensure that the multi-span continuous rigid frame bridge is closed smoothly and the stress state meets the design requirements,it is necessary to analyze the structural state during construction.Taking the main bridge of Majinrenhe Bridge as the engineering background,the internal force state and construction pre-deformation value of the main beam are obtained by establishing a refined finite element model and calculating and analyzing the structural parameters of the bridge in each construction stage.The results show that the stress state of the bridge structure after completion is consistent with the target and the practical application of the control method is good,and can provide some reference for other similar projects.

关 键 词：连续刚构桥 悬臂浇筑 有限元分析 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]