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首页> 外文会议>Structural Stability Research Council 2002 Annual Stability Conference; Apr 24-27, 2002; Seattle, Washington >POSTBUCKLNG STRENGTH OF STEEL BOX GIRDER FLANGES
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POSTBUCKLNG STRENGTH OF STEEL BOX GIRDER FLANGES

机译：钢箱梁法兰的后屈服强度

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摘要

It has been known for many years that even after buckling, rectangular plates supported along all the four edges are able to exert considerable postbuckling strength depending upon the slenderness ratio. In the case where buckling occurs prior to yielding, the AASHTO LRFD specifications (1998), however, consider the buckling as the flexural strength limit state not only of a stiffened compression flange itself, but of a whole steel box girder section as well. In this study, the postbuckling capabilities of stiffened and unstiffened compression panels were investigated through geometric and material nonlinear finite element analysis. Also, evaluated were required minimum bending rigidities for longitudinal and transverse stiffeners that are necessary for the stiffeners to be able to provide separated panels with the simply supported boundary condition during postbuckling.
机译：多年以来已知，即使在屈曲之后，根据细长比，沿所有四个边缘支撑的矩形板也能够发挥相当大的屈曲后强度。然而，在屈服之前发生屈曲的情况下，AASHTO LRFD规范（1998年）不仅将屈曲视为加劲的压缩翼缘本身的挠曲强度极限状态，而且还将整个钢箱梁截面视为挠曲强度极限状态。在这项研究中，通过几何和材料非线性有限元分析研究了加劲板和未加劲板的后屈曲能力。此外，还评估了纵向和横向加劲肋所需的最小弯曲刚度，这是加劲肋在后屈曲过程中能够为分离的面板提供简单支撑边界条件所必需的。

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