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首页> 外文期刊>International journal of steel structures >The Evaluation of the Previous Models Used to Study the Web Post-buckling
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The Evaluation of the Previous Models Used to Study the Web Post-buckling

机译：对用于研究网络后屈曲的先前模型的评估

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The number of suggested and modified theories for web post-buckling behavior shows that this is one of the topics receiving much attention in civil engineering. However, the controversy related to the elusive behavior of web post-buckling is going on. The present study using an updated data set from 27 previous experimental shear tests and the current FEA results is to evaluate Basler's model which represents classical theories and Lee and Yoo's model which represents recent researches. This research indicates that none of the investigated models provides the accurate prediction of ultimate shear strength in the whole range of practical parameters, they tend to overestimate or underestimate the ultimate shear strength of the girder depending on the aspect ratio of the web panel. Besides, the current FEA results reveal that the in-plane tension field (classical tension field) as in Basler's theory is not the unique source in web post-buckling reserve and does not characterize the actual behavior of web post-buckling. The reason is that the stresses on two surfaces of the web panel dominate the post-buckling reserve.
机译：Web后屈曲行为的建议和经过修改的理论数目表明，这是土木工程领域倍受关注的主题之一。但是，与Web后屈曲难以捉摸的行为有关的争议仍在继续。本研究使用来自27个先前的实验剪切试验的最新数据集以及当前的有限元分析结果，旨在评估代表经典理论的Basler模型和代表最新研究的Lee and Yoo模型。这项研究表明，所研究的模型中没有一个能够在整个实际参数范围内准确预测极限抗剪强度，而根据腹板的纵横比，它们往往会高估或低估梁的极限抗剪强度。此外，目前的有限元分析结果还表明，Basler理论中的面内张力场（经典张力场）并非是腹板屈曲后备力的唯一来源，也无法表征腹板后屈曲的实际行为。原因是腹板面板两个表面上的应力支配了屈曲后储备。

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