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Effect of local instability on fire response of steel beams

机译：局部失稳对钢梁火灾响应的影响

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Purpose This purpose of this paper is to quantify the effect of local instability arising from high shear loading on response of steel girders subjected to fire conditions. Design/methodology/approach A three-dimensional nonlinear finite element model able to evaluate behavior of fire-exposed steel girders is developed. This model, is capable of predicting fire response of steel girders taking into consideration flexural, shear and deflection limit states. Findings Results obtained from numerical studies show that shear capacity can degrade at a higher pace than flexural capacity under certain loading scenarios, and hence, failure can result from shear effects prior to attaining failure in flexural mode. Originality/value The developed model is unique and provides valuable insight (and information) to the fire response of typical hot-rolled steel girder subjected to high shear loading.
机译：目的本文的目的是量化由高剪切载荷引起的局部不稳定性对火灾条件下钢梁响应的影响。设计/方法/方法建立了能够评估火灾下钢梁性能的三维非线性有限元模型。考虑到弯曲，剪切和挠曲极限状态，该模型能够预测钢梁的火灾响应。研究结果从数值研究中获得的结果表明，在某些载荷情况下，抗剪能力的下降速度可能比抗弯能力高，因此，在弯曲模式下达到破坏之前，剪切作用可能会导致破坏。独创性/价值所开发的模型是独特的，可为承受高剪切载荷的典型热轧钢梁的火灾响应提供有价值的见解（和信息）。

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