基于梁格法对斜交箱梁桥的有限元分析.pdf

第42卷,第5期
公路工程
Vol 42 No 5
2017年10月
Highway Engineeri
oct.,2017
基于梁格法对斜交箱梁桥的有限元分析
曲道来,邓天蓝2,責帅
(1.湖南省高速公路建设开发总公司,湖南长沙41000;2.湖南省交通职业技术学院,湖南长沙410000
3.中南林业科技大学,湖南长沙410004)
[摘要]通过有限元分析软件 Midas/Ci,分别对斜交角为15°、30°、45°的两跨预应力混凝土连续箱梁
桥的成桥状态进行研究,并同时采用正交梁格法和斜交梁格法做进一步的有限元分析,将两种方法计算得到的
反力、位移、内力结果进行了比较,结果表明:随着斜交角度的增大,炖角处的支点反力也在增大,锐角处反
而在变小,此时要提高钝角处箱梁的强度,增加配筋;纵梁弯矩峰值逐渐减小,但横向弯矩逐渐增大,此时应
当加强横向配筋;采用正交梁格模型时的各纵梁的弯矩峰值相比斜交梁格就越小,正交梁格的优势越明显。
关键词]有限元分析;正交梁格;斜交梁格;箱梁
中图分类号]U448.213[文标识码]A
[文章编号]1674-0610(2017)05-0359-05
Analysis on Skew Box Girder Bridge Affected By Grid
Frame Method
QU Daolai', DENG Tianlan,, 'YUAN Shuai
1. Hunan Expressway Construction and Development Corporation, Changsha, Hunan 410000, China;
2. Hunan Communication Polytechnic, Changsha, Hunan 410000, China; 3. Central South Univer-
sity of Forestry and Technology, Changsha Hunan 410004 China)
Abstract] Through finite element analysis software Midas/Civil, this paper has carried on the fi-
nite element analysis on
skew Angle of 15 degrees, 30 degrees, 45 degrees into two span prestressed
concrete continuous box girder bridge bridge state adopting orthogonal girder method and skew girder
method respectively at the same time. Then comparing the results of the reaction force, displacement and
internal force by the two methods. The results showed that: with the increase of skew Angle, there are
three kinds of results. One of them is the obtuse fulcrum reaction gradually increasing and the acute An
gle of becoming smaller and smaller. So it needs to
re the strength of the box girder and increase
the obtuse Angle of reinforcement. One is the Longitudinal beam bending moment peak decreasing, but
the lateral bending moment increases gradually. So it should strengthen the transverse reinforcement at
the same time. The last result is that orthogonal grillage model of each longitudinal beam bending moment
peak is smaller and the advantage of the orthogonal beam grillage model becomes more obvious
Key words] the finite element analysis, orthogonal girder frame, skew girder frame, box girder
交桥的受力复杂,用单梁模型不能很好地反映其受
概述
力状况,国内外研究学者从多个角度,采用多种分
多跨连续箱粱桥,属于超静定体系,其具析方法来对斜交桥进行了研究,本文结合相关
有桥面接缝少、刚度大、整体性强、便于养护等优研究成果,采取有限元法,引入梁格模型来对斜交
点。为改善道路线性,使公路运营更加舒适、顺桥进行分析。
畅,在实际建设中,往往需要修建很多斜交桥,斜
收稿日期]2017-08-08
[作者简介]曲道来(1983-),男,辽宁抚顺人,工程师,从事高速公路建设与管理工作。
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