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首页> 外文会议>World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium >Elastic Lateral Torsional Buckling of Simply Supported Beams under Concentrated Load and Linear Moment Gradient
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Elastic Lateral Torsional Buckling of Simply Supported Beams under Concentrated Load and Linear Moment Gradient

机译：集中负荷和线性时刻梯度下的简单支撑梁弹性横向扭转折叠

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摘要

Lateral torsional buckling is a limit state for I-shaped steel beams that may often be a controlling issue in structural steel design. When these members are not appropriately braced so as to prevent lateral deformations and torsion, they are subjected to risk of failure by lateral torsional buckling before reaching their ultimate capacity. This paper investigates elastic lateral torsional buckling of simply supported I-shaped steel beams under concentrated load and linear moment gradient using design standards and codes, approaches from the literature and finite element analysis. Several unbraced member lengths and end moment values are taken into account to compare and evaluate these approaches in terms of elastic critical moment and end moment ratios. Analysis results show that lateral torsional buckling is a crucial stability problem for I-shaped steel members that are under flexure and it is reflected with adequate safety in the design codes and standards considering finite element analysis outcomes.
机译：横向扭转屈曲是I形钢梁的极限状态，其通常可以是结构钢设计中的控制问题。当这些成员不适当支撑以防止横向变形和扭转时，在达到最终容量之前，它们受到横向扭转弯曲的风险。本文研究了使用设计标准和码，从文献和有限元分析的方法和线性时刻梯度下简单地支撑的I形钢梁的弹性横向扭转折叠。考虑了几个横布的成员长度和结束时刻值，以比较和评估这些方法在弹性关键时刻和结束时刻比率。分析结果表明，横向扭转屈曲是在弯曲下的I形钢构件的关键稳定性问题，并且考虑有限元分析结果，在设计代码和标准中具有足够的安全性。

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