客运专线预应力混凝土箱梁张拉阶段性能研究  

Study on Behavior of Prefabricated Box Girder on Passenger Dedicated Line at Tension Phase

作　　者：王玮玮[1] 罗华[1] 王光辉[1] 李斌[1] WANG Weiwei;LUO Hua;WANG Guanghui;LI Bin(College of Civil Engineering and Architecture,Hunan Institute of Science and Technology,Yueyang 414006,China)

机构地区：[1]湖南理工学院土木建筑工程学院,湖南岳阳414006

出　　处：《湖南理工学院学报（自然科学版）》2018年第1期52-57,共6页Journal of Hunan Institute of Science and Technology(Natural Sciences)

基　　金：湖南省教育厅科研项目(16C0725);湖南理工学院科研项目(2015Y07);湖南省大学生研究性学习项目(湘教通[2016]96号;201610543005)

摘　　要：以预制客运专线33m预应力混凝土箱梁为研究对象,在试验的基础上对箱梁进行了有限元分析,并分析对比了实测与有限元结果.分析结果表明截面的应力随着张拉次数的增加而增加,底板增加的幅度大于顶板,在各张拉阶段底板的有限元计算应力与实测应力稍有偏差,而顶板吻合较好;有限元能很好地模拟各张拉阶段梁体的变形情况.A Pre-stressed concrete box girder of 32m was studied in this paper,finite element analysis on the girder was carried out based on the experiment,and the calculations with the finite element analysis were compared with the experimental results.It showed that the stress of the cross sections increases with tension of tendons;the rate of increase in the bottom slab is greater than that in the top slab.Stress in top slab calculated with the finite element analysis is in good agreements with that from experimental results but not in bottom slab.

关 键 词：预应力 箱梁 有限元分析 测试 上拱度 

分 类 号：U441[建筑科学—桥梁与隧道工程]