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首页> 外文会议>International Conference on Civil Engineering and Building Materials >Simple formulae for distortional buckling loads of cold-formed thin-walled rack members upright with rear flange and additional lip stiffeners
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Simple formulae for distortional buckling loads of cold-formed thin-walled rack members upright with rear flange and additional lip stiffeners

机译：用于扭曲屈曲负荷的简单公式，冷成型薄壁架构构件直立，带有后法兰和额外的唇缘加强件

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The determination of the elastic distortional buckling loads of the cold-formed lipped channel sections upright with rear flange and additional lip stiffeners subjected to the pure bending was performed based on the analytic solutions combined with CUFSM. The parameter analyses were carried out under the extreme load case of pure bending, leading to approximate formulae for predicting the buckling half-wavelength and the modified factor to take into account the effect of the shear and distortional deformation of the flange section. The rotational restraint, provided by the web to the flange during buckling deformation, was then examined, and a more accurate linear approximate expression for the rotational restraint and the web stress was proposed. Based on these approximate formulae, simplified formulae were finally developed to predict the elastic distortional buckling loads of the cold-formed lipped channel sections upright with rear flange and additional lip stiffeners subjected to the pure bending. The proposed formulae are shown to be accurate through comparison with the results of CUFSM, easy to be applied, may be used in practical applications and taken account into design codes and guidelines.
机译：基于与CUFSM组合的分析溶液，对具有后凸缘的冷形成的锁定通道部分的弹性扭曲屈曲负载的弹性扭曲屈曲负荷直立，以及经受纯弯曲的附加唇加强物。参数分析在纯弯曲的极端负载情况下进行，导致近似的公式，用于预测屈曲半波长和修改因子，以考虑凸缘部分的剪切和扭曲变形的效果。然后检查旋转变形期间的旋转限制，向弯曲变形期间提供，提出了一种更准确的旋转约束和幅材应力的线性近似表达。基于这些近似公式，最终开发了简化的公式，以预测冷成型嘴沟道部分的弹性扭曲屈曲负载直立，具有后凸缘和经受纯弯曲的额外唇缘加强件。所提出的配方通过与CUFSM的结果进行比较，可以准确，易于应用，可用于实际应用，并将其考虑到设计代码和指导。

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