下承式钢桁梁托顶推施工受力分析  

Analysis on the force of pushing construction of steel girder with undercarriage

作　　者：童孝红[1] 董宇 王栋 王立峰 寿凌超 Tong Xiaohong;Dong Yu;Wang Dong;Wang Lifeng;Shou Lingchao(Hangzhou Railway Design Institute Co.,LTD.,Hangzhou 310000,China;Zhejiang Mingsui Technology Co.,LTD.,Hangzhou 310000,China)

机构地区：[1]杭州铁路设计院有限责任公司,杭州310000 [2]浙江明燧科技有限公司,杭州310000

出　　处：《建设科技》2024年第19期108-111,共4页Construction Science and Technology

摘　　要：本文依托龙游站新建天桥的钢桁梁项目,采用数值模拟方法对天桥顶推施工过程中的结构响应进行了模拟分析,其结果如下:在不同施工阶段,钢桁梁的应力分布呈现出显著的动态变化,尤其在悬臂区域和直腹杆区域;钢桁梁最大挠度主要出现在屋面横梁处;顶推过程中反力值与悬臂距离呈现正相关性;该设计方案满足抗倾覆和局部稳定的规范要求,以期研究成果对相似工程有一定的借鉴意义。In this paper,based on the steel girder project of the new overpass in Longyou Station,the structural response of the overpass is simulated and analyzed by numerical simulation method.The results are as follows:in different construction stages,the stress distribution of the steel girder shows significant dynamic changes,especially in the cantilever area and the straight belly bar area;The maximum deflection of steel girder mainly occurs at the beam of roof.There is a positive correlation between the reaction force and the distance of the cantilever during the pushing process.The design scheme meets the specification requirements of anti-overturning and local stability.The research results can be used for reference in similar projects.

关 键 词：钢桁梁 位移 应力 支反力 

分 类 号：U445.462[建筑科学—桥梁与隧道工程]