Torsion and distortion analysis of thin-walled box girder with cantilever flanges

被引：0
作者：
School of Civil Engineering, Southwest Jiaotong University, Chengdu [1 ]
610031, China
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
来源：
Tiedao Xuebao | / 10卷 / 83-91期
关键词：
Box girder with cantilever flange; Bridge engineering; Distortion; Mixed variational principle; Shear deformation; Torsion;
D O I：
10.3969/j.issn.1001-8360.2015.10.012
中图分类号：
学科分类号：
摘要：
In order to investigate the influence of cantilever flange on the torsion and distortion of thin-walled box girder, based on the generalized coordinate principle, displacement model and geometric equation were established. Using the mixed variational principle, a new theory was presented to analyze the torsion and distortion of thin-walled girder with open and closed cross-section, which can sufficiently take account of the influence of shear deformation. The distribution and composition of shear flow on the box girder with cantilever flanges were analyzed, and the two calculation methods to derive the shear flow were compared and unified to study the internal force state of cantilever flange and its influence. The results showed that the contribution of cantilever flanges to the torsion and distortion effect was mainly reflected in the proportion of warping moment of inertia. The cantilever flanges caused the significant redistribution of torsion and distortion warping stress of closed cross-section. The cantilever flanges caused the increase of shear deformation effect. This effect increased with the increase of the cantilever flanges. The contribution of cantilever flanges can not be neglected for the common box-girder bridges. ©, 2015, Science Press. All right reserved.
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页码：83 / 91
页数：8
相关论文
共 17 条
  • [1] Ren H.-W., Experimental Study on Prestressed Concrete Box-girders with Corrugated Steel Webs under Symmetrical Loads, Journal of the China Railway Society, 30, 1, pp. 60-64, (2008)
  • [2] Peng D.-W., Yan H., Analysis of Shear Lag Effect in Curved Shine Box Girder, Journal of the China Railway Society, 23, 4, pp. 76-80, (2001)
  • [3] Vlasov V.Z., Thin-Walled Elastic Beams, (1961)
  • [4] Qiang S.-Z., Li Q., Restraint Rigid-Torsion Theories of Thin-walled Girder with Closed Cross-Section, Bridge Construction, 1, pp. 63-75, (1985)
  • [5] Guo Z.H., A Unitied Theory of Thin-walled Elastic Structures, Journal of Structural Mechanical, 9, 2, pp. 273-281, (1981)
  • [6] Shakourzadeh H., Guo Y.Q., Batoz J.-L., A Torsion Bending Element for Thin-walled Beams with Open and Closed Cross Sections, Computers & Structures, 55, 6, pp. 1045-1054, (1995)
  • [7] Prokic A., Thin-walled Beams with Open and Closed Cross Sections, Computers & Structures, 47, 6, pp. 1065-1070, (1993)
  • [8] Prokic A., Computer Program for Determination of Geometrical Properties of Thin-walled Beams with Open-Closed Section, Computers & Structures, 74, 6, pp. 705-715, (2000)
  • [9] Zhou L., Exploration of Contribution of Cantilever Flanges of Thin-walled Box Girder to Its Behavior in Warping Torsion, World Bridges, 3, pp. 28-33, (2003)
  • [10] Wright R.N., Abdel-Samad S.R., Robinson A.R., BEF Analogy for Analysis of Box Girders, Journal of the Structural Division, ASCE, 94, 7, pp. 1719-1743, (1968)
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