大跨度连续箱梁桥挠度敏感性分析  

Analysis on Deflection Sensibility of Large-span Continuous Box Girder Bridge

作　　者：刘菊玖 姜天华[2] 杨壮[2] LIU Jujiu JIANG Tianhua YANG Zhuang(Guangzhou Municipal Engineering Design ＆ Research Institute, Guangzhou Guangdong 510060,China College of Urban Construction, Wuhan University of Science and Technology, Wuhan Hubei 430065, China)

机构地区：[1]广州市市政工程设计研究总院,广东广州510060 [2]武汉科技大学城市建设学院,湖北武汉430065

出　　处：《铁道建筑》2017年第6期21-23,共3页Railway Engineering

基　　金：广东省市政行业协会课题(KY-2016-005-S)

摘　　要：以一座预应力混凝土连续刚构桥作为研究对象,采用MIDAS/Civil有限元软件进行数值模拟,对影响大跨度箱梁桥挠度的因素进行敏感性分析。研究结果表明:大跨度连续箱梁桥挠度对张拉控制应力最为敏感,其次为预应力损失,对其他因素的敏感性都不大;跨中挠度变化最大,对各因素的变化最敏感。Taking a prestressed concrete rigid frame bridge as the object,numerical simulation of MIDAS/Civil finite element software was adopted to carry out sensitivity analysis of factors affecting deflection oflarge-span box girder bridge. The results showthat the deflection is the most sensitive to tension control stress,followed by prestress loss,and has little sensitivity to other factors. The change of midspan deflection is the largest. The deflection is the most sensitive to the change of various factors.

关 键 词：大跨度桥梁 挠度 数值模拟 预应力混凝土箱梁 敏感性分析 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]