• ISSN 0258-2724
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Volume 21 Issue 1
Feb.  2009
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Article Contents
KANG Xiaoxian, QIANG Shizhong. Modification of Tension Field Theory on I-girder Web[J]. Journal of Southwest Jiaotong University, 2008, 21(1): 77-81.
Citation: KANG Xiaoxian, QIANG Shizhong. Modification of Tension Field Theory on I-girder Web[J]. Journal of Southwest Jiaotong University, 2008, 21(1): 77-81.

Modification of Tension Field Theory on I-girder Web

  • Received Date: 17 Apr 2007
  • Publish Date: 25 Feb 2008
  • To take the restraint provided to I-girder webs by the flange and the initial imperfection of structure into account,the advantages and disadvantages of the Basler tension field theory and the Rockey tension field theory were discussed based on a comparison between the nonlinear FEM(finite element method) analysis and test results,and the applicable range of these tension field theories was pointed out,i.e.,depth-thickness ratio of web hw/tw≥160.A formula was proposed for the shear buckling coefficient to describe the restraint of the flange,and the proposed formula was used to modify the Basler tension field theory.The modified tension field theory considering the contribution of the flange was applied to predict the shear resistance of webs,showing an excellent accuracy.The research provides a reference for the designs of steel bridges and other steel structures and the emendation of the related norms.

     

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