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ZHANG Qian, DI Jin, ZHOU Xu-hong. Calculation method of critical buckling stress for stiffened plate with closed ribs[J]. Journal of Traffic and Transportation Engineering, 2012, 12(5): 37-42. doi: 10.19818/j.cnki.1671-1637.2012.05.005
Citation: ZHANG Qian, DI Jin, ZHOU Xu-hong. Calculation method of critical buckling stress for stiffened plate with closed ribs[J]. Journal of Traffic and Transportation Engineering, 2012, 12(5): 37-42. doi: 10.19818/j.cnki.1671-1637.2012.05.005
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Calculation method of critical buckling stress for stiffened plate with closed ribs

doi: 10.19818/j.cnki.1671-1637.2012.05.005
  • 1.

    School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China

  • 2.

    School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, Gansu, China

  • 3.

    School of Civil Engineering, Hunan University, Changsha 410082, Hunan, China

More Information
  • Author Bio:

    ZHANG Qian(1982-), female, lecturer, doctoral student, +86-931-8915368, windzhq@163.com

    ZHOU Xu-hong(1956-), male, academician of Chinese Academy of Engineering, professor, PhD, +86-931-8915368, zhouxuhong@126.com

  • Received Date: 2012-03-06
    Abstract
  • A calculation method of critical buckling stress for stiffened plate with closed ribs was proposed by using energy method under unidirectional uniform pressure and simply supported on four sides. The influence of torsional rigidity of stiffened ribs was considered, the whole flexural rigidity of mother board and stiffened ribs was calculated according to the centroid of actual section. The stiffened plates with closed trapezoidal ribs in the steel box girder of Suzhou-Nantong Bridge were taken as example, the critical buckling stresses calculated by Timoshenko method, Ichiro Konishi method, shell finite element method and the proposed energy method were compared. Analysis result shows that when the length-width ratio β of stiffened plate is less than 1, the ratio λ values of critical buckling stress to steel yield strength calculated by Timoshenko method and Ichiro Konishi method are greater than the calculation value of energy method. When β is between 1 to 6, the λ values calculated by Timoshenko method and Ichiro Konishi method are less than the calculation value of energy method. When β is between 3 to 6, the calculation value of energy method is most approaching with the result of finite element analysis, their difference is between 9% to 25%. So the proposed energy method is feasible to analyze the elastic stabilities of top and bottom plates for orthotropic steel box girder.

     

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