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首页> 外文期刊>International journal of steel structures >DSM Design of Cold-Formed Steel Columns Failing in Distortional Modes at Elevated Temperatures
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DSM Design of Cold-Formed Steel Columns Failing in Distortional Modes at Elevated Temperatures

机译:高温下变形模式失败的冷弯型钢圆柱的DSM设计

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This paper aims at investigating the structural behaviour, strength and Direct Strength Method (DSM) design of cold-formed steel columns failing in distortional modes at elevated temperatures. The results concern pin-ended and fixed-ended columns displaying four cross-section shapes, with various dimensions, subjected to 8 temperatures. It is shown that the current DSM distortional design is unable to handle adequately distortional failures at elevated temperatures. Then, a modified DSM design approach is proposed: it consists of incorporating a temperature-dependent reduction factor ratio, based on the EC3-1.2 model, in the existing strength curvethe modified design curves are shown to yield adequate failure load predictions for the set of columns under consideration. This finding provides motivation and encouragement to continue the ongoing search for an efficient DSM-based design approach for columns failing in distortional modes under elevated temperatures.
机译:本文旨在研究在高温下以扭曲模式破坏的冷弯型钢柱的结构性能,强度和直接强度法(DSM)设计。结果涉及在8种温度下显示四个横截面形状(具有各种尺寸)的销钉端部和固定端柱。结果表明,当前的DSM变形设计无法在高温下充分处理变形故障。然后,提出了一种改进的DSM设计方法:该方法包括在EC3-1.2模型的基础上,结合温度相关的折减系数比,在现有强度曲线中,示出了改进的设计曲线,以针对该组合得出足够的破坏载荷预测。正在考虑的列。这一发现为继续寻找有效的基于DSM的设计方法提供了动力和鼓励,以解决在高温下以扭曲模式失效的色谱柱。

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