单箱双室箱梁腹板传力分析.pdf

2010年12月高速铁路技术 Supplement 增刊HIGH SPEED RAILWAY TECHNOLOGY ===::::============%==========::::====:========================================== 文章编号:1674-.-.-8247(2010)z一_019l卸5 单箱双室箱梁腹板传力分析王业飞鄢勇易富民戴胜勇(中铁二院工程集团有限责任公司, 成都610031) 摘要:以某单箱双室连续梁为工程背景,采用LUSAS有限元分析软件建立了基于三维实体单元的全桥有限元模型。对该桥全桥进行了计算,并分析了边腹板和中腹板传力的区别以及顶板横向传力的趋势,得出了一些结论,可供类似桥梁设计时参考。关键词:箱梁;单箱双室;腹板;传力中图分类号:U441 文献标识码:A Analysis on Force Transmission ofWeb with Single-Box BOX Girder WANG Ye-fei YAN YongⅥFu-rain DAI Sheng-yong (China Railway Eryuan Engineering Group Co.,Ltd,Chengdu 610031,China) Abstract:Backgrounded by theengineering of asingle boxtwinloom continuous box girder,a finite element model of whole bridge based on3—·Dsolidelement established using LUSAS finiteelement analysis conclusion obtained from theanalysis on differences between sidewebs,and medium webs aswell a8thetrend ofthelateralforcetransmission oftopplate based on thecalculation ofthewhole bridge,which may be areference for design ofsimilarbridges. Key words:box girder;single-box double-cell;web;force transmission 1 工程概况在建的5×32 Ill某连续梁桥为一变线间距的单箱双室连续梁(线路走向为曲线变线间距,梁体直做)。箱梁高255 cm,顶板宽1 ~1 ,—。,顶板厚35 cm,横隔板附近由35 cm渐变至55 cm。底板厚35 cm,横隔板附近由35 cm渐变至55 cm。腹板厚 45cm,横隔板附近由45 cm渐变至80 cm,顶板宽和箱宽均为线性变化。梁体小里程端部隔板厚120 cm,大里程端部隔板厚150 cm,中支墩处隔板厚200 cm。梁体纵桥向和横桥向均不对称,梁体构造剖面图如图1所示。梁体每个墩的横隔板处按双支座布置,即