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双肢薄壁墩刚构桥上无缝线路有限元分析研究
引用本文:江万红,唐进锋,朱彬,李保友.双肢薄壁墩刚构桥上无缝线路有限元分析研究[J].都市快轨交通,2008,21(4):46--50.
作者姓名:江万红  唐进锋  朱彬  李保友
作者单位:1. 中南大学,长沙,410075
2. 中铁第四勘察设计院集团有限公司,武汉,430063
3. 中国中铁二院工程集团有限责任公司,成都,610031
摘    要:建立两种以轨道、桥梁、支座、墩台、基础为整体结构的纵向附加力计算有限元模型,计算某特大型双肢薄壁墩刚构桥纵向附加力。计算伸缩力时采用平面有限元模型,同时对线路纵向阻力与梁温差进行参数影响分析;计算断轨工况时,建立半空间有限元模型以反映实际工况,对断缝大小进行准确计算;运用移动加载瞬态分析法,采用平面有限元计算模型,计算绘制钢轨挠曲力包络图,同时求得挠曲力计算的最不利加载位置。

关 键 词:刚构桥  桥上无缝线路  纵向附加力  有限元
修稿时间:2013/12/6 0:00:00

Finite Element Analysis for the Continuously-welded Rail on a Frame Bridge with Two Slender Piers
Jiang Wanhong,Tang Jinfeng,Zhu Bin,Li Baoyou.Finite Element Analysis for the Continuously-welded Rail on a Frame Bridge with Two Slender Piers[J].Urban Rapid Rail Transit,2008,21(4):46--50.
Authors:Jiang Wanhong  Tang Jinfeng  Zhu Bin  Li Baoyou
Institution:Jiang Wanhong1 Tang Jinfeng1 Zhu Bin2 Li Baoyou3
Abstract:Two finite element models are established to calculate the additional longitudinal forces of the integrated system consisting of track,beams,abutments,piers and foundation,and the additional longitudinal forces of a big frame bridge with two slender piers are calculated.The expansion forces are computed by adopting a plane model with the influence of longitudinal resistance and the difference in temperatures in the beam considered and analyzed.When one disjunction appears on one rail,a half-space model is established to calculate the rail gap accurately.Based on transient dynamic analysis for motion loading,maximum bending forces are calculated by adopting plane model,and the envelope of the bending forces is drawn thereupon.
Keywords:frame bridge  continuously-welded rail on bridge  additional longitudinal forces  finite element
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