大跨连续刚构拱桥拱肋拼装支架设计与计算  

Design and Calculation of Arch Rib Assembly Bracket for Long-span Continuous Rigid Frame Arch Bridge

作　　者：刘伟[1] LIU Wei(China Railway 18th Bureau Group the Fourth Engineering Co.,Ltd.,Tianjin,300202,China)

机构地区：[1]中铁十八局集团第四工程有限公司,天津300202

出　　处：《石家庄铁路职业技术学院学报》2025年第1期29-33,共5页Journal of Shijiazhuang Institute of Railway Technology

基　　金：中铁十八局集团有限公司科技研发项目(0-JF-2025-雄忻-0-001)。

摘　　要：连续刚构拱桥由于跨越能力强,常被铁路用来跨越河流、峡谷等复杂地形。对于连续梁刚拱桥,一般采用“先梁后拱”施工,即主梁先悬臂施工,拱肋在已建好的主梁上采用支架拼装施工。其中,拱肋支架拼装是施工中的重难点。本文以跨胭脂河特大桥主桥连续刚构拱桥为背景,在拱肋施工阶段,根据拱肋节段划分、现场吊装等因素,设计了一种适用于本桥拱肋拼装施工的支架结构,并建立支架结构有限元计算模型,对整个拼装过程中的支架受力进行计算分析,结果表明:支架结构的强度、变形以及稳定性均满足规范要求,确保了支架结构在拱肋拼装施工过程中结构安全。Due to their strong spanning capability,continuous rigid frame arch bridges are often used by railways to cross complex terrain such as rivers,valleys,and other complex terrains.For continuous beam rigid arch bridges,the construction of"beam first and arch later"is generally adopted,that is,the main beam is cantilevered first,and the arch rib is assembled with brackets on the built main beam.Among these processes,arch rib support assembly is the key and difficult task in construction.In this paper,the continuous rigid frame arch bridge of the main bridge of the Yanzhi River Bridge is taken as the background.In the construction stage of the arch rib,according to the factors such as the division of the arch rib segment and the on-site hoisting,a bracket structure suitable for the assembly construction of the arch rib of the bridge is designed,and the finite element calculation model of the bracket structure is established.The stress of the bracket in the whole assembly process is calculated and analyzed.The results show that the strength,deformation and stability of the bracket structure meet the requirements of the specification,which ensures the structural safety of the bracket structure in the process of arch rib assembly construction.

关 键 词：连续刚构拱 拱肋支架 有限元 计算分析 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]