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首页> 外文期刊>International journal of steel structures >Rotational Stiffness Requirements of Closed-Section Stiffeners for Buckling Strength Increment of Stiffened Plates Under Uniaxial Compression
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Rotational Stiffness Requirements of Closed-Section Stiffeners for Buckling Strength Increment of Stiffened Plates Under Uniaxial Compression

机译：单轴压缩下加劲板屈曲强度增加的封闭截面加劲肋的旋转刚度要求

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摘要

In these days, closed form solutions to estimate the strength increment in the local buckling strength due to the rotational stiffness of the closed-section ribs have been proposed through theoretical approaches using the energy methods and parametric numerical analysis. In this paper, the correlations between the local buckling strength of longitudinally stiffened plates and the rotational restraint stiffness of closed-sections ribs were thoroughly investigated through numerical analyses. Three-dimensional finite element models of longitudinally stiffened plates were obtained using ABAQUS, and a series of comprehensive parametric numerical analyses were conducted in order to reveal the influential design parameters for required rotational stiffness of closed-section ribs for reaching converged buckling strengths. Then, a simplified design equation for the required rotational stiffness for the stiffened plate buckling strength has been proposed, which are applicable for both flat and curved plates to achieve optimum design sections. The comparative study and trend analysis showed that the proposed design methods have a good correlation with the numerical analysis results. Finally, a series of design examples demonstrate a design process of the longitudinally stiffened plates with closed-section ribs by using the proposed design equations.
机译：近年来，已经通过使用能量方法和参数数值分析的理论方法提出了闭合形​​式的解，以估计由于闭合截面肋的旋转刚度引起的局部屈曲强度的强度增加。通过数值分析，深入研究了纵向加劲肋板的局部屈曲强度与封闭截面肋骨的旋转约束刚度之间的关系。利用ABAQUS获得了纵向加筋板的三维有限元模型，并进行了一系列综合参数数值分析，以揭示影响闭合截面肋骨达到抗弯强度的设计参数的影响设计参数。然后，提出了用于加强板屈曲强度所需旋转刚度的简化设计方程，该方程适用于平板和弯曲板，以实现最佳设计截面。对比研究和趋势分析表明，所提出的设计方法与数值分析结果具有很好的相关性。最后，一系列设计示例通过使用建议的设计方程式演示了具有封闭截面肋的纵向加劲板的设计过程。

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