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首页> 外文期刊>International journal of steel structures >Cross-Section Properties and Elastic Lateral-Torsional Buckling Capacity of Steel Delta Girders
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Cross-Section Properties and Elastic Lateral-Torsional Buckling Capacity of Steel Delta Girders

机译：钢三角梁的横截面特性和弹性横向屈曲容量

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In this paper, the behavior of slender steel delta girders (SDG) is investigated both analytically and numerically. In the analytical analysis, closed-form equations for cross-section properties of SDG are derived. They are then compared with solutions obtained numerically. Using these cross-section properties, the theoretical elastic lateral-torsional buckling (LTB) strength of these girders are determined and compared with results obtained from a finite element analysis. The results show that the theoretical LTB equation derived for general open monosymmetric I-sections can be applied to these delta girders. Additionally, it is shown that a simplified expression for the coefficient of monosymmetry x derived for I-sections can be used in the computation of LTB strength for SDG. A parametric study is then performed to demonstrate the effectiveness of SDG in achieving a favorable strength-to-weight ratio when compared to standard I-section members. Based on the results of this parametric study, it is recommended that the height and width of the delta region of the cross-section be equal to two-fifth the height of the web and three-quarter the width of the compression flange, respectively.
机译：在本文中，在分析和数值上研究了细长钢化型晶晶（SDG）的行为。在分析分析中，推导出用于SDG的横截面性质的闭合方程。然后将它们与数字上获得的溶液进行比较。使用这些横截面性质，确定这些梁的理论弹性横向弯曲（LTB）强度并与从有限元分析中获得的结果进行比较。结果表明，对于一般开放的单次微秒I-衍生的理论LTB方程可以应用于这些三角形梁。另外，示出了用于I-部分导出的单次称性x系数的简化表达可以用于计算SDG的LTB强度。然后进行参数研究以证明与标准I型部分成员相比，SDG在实现有利的强度重量比中的有效性。基于该参数研究的结果，建议横截面的Δ区域的高度和宽度等于幅材的高度和三分之三的压缩法兰的宽度。

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