中承式钢管混凝土拱桥拱肋管内混凝土灌注过程分析  

Analysis of In-pipe Concrete Grouting Process for Arch Ribs in Half-through Concrete-filled Steel Tubular Arch Bridge

作　　者：关敬文 王楚杰 GUAN Jing-wen;WANG Chu-jie(Guangxi Road and Bridge Engineering Group Co.,Ltd.,Nanning,Guangxi,530011)

机构地区：[1]广西路桥工程集团有限公司,广西南宁530011

出　　处：《西部交通科技》2018年第10期124-129,共6页Western China Communications Science & Technology

摘　　要：文章聚焦管内混凝土灌注过程,利用有限元软件ANSYS建立空间有限元模型,采用单元生死与工况叠加模拟方法,对某中承式钢管混凝土拱桥进行计算分析,得到结论:钢管拱各控制点的应力变化均处于规范要求内,但拱顶上挠达6cm,给工程带来较大风险,需要使用斜拉扣索进行调载;拱肋挠度、应力伴随着工序的推进表现为循环性变化,并遵循影响线叠加原则。This article focused on the grouting process of in-pipe concrete, established the spatial finite element model by using the finite element software ANSYS,and by using the method of unit life/death and working condition superposition simulation, it calculated and analyzed such half-through concretefilled steel tubular arch bridge,and drew the conclusions： the stress changes at each control point of steel pipe arch are all within the specification requirements,but the warp on the vaults is up to 6 cm, which poses a great risk to the project and requires the use of cable stays for load adjustment; and the deflection and stress of arch ribs show the cyclical change with the progress of construction process and follow the influence line superposition principle.

关 键 词：钢管混凝土拱桥 管内混凝土 连续灌注 影响线 

分 类 号：U448.221[建筑科学—桥梁与隧道工程]