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该文结合试验研究和理论分析对双角钢十字组合断面受力性能做了初步探索,分别考察了构件的长细比、肢宽比和填板对承载力的影响。根据薄板能量理论和虚功原理,推导出构件极限承载力公式,提出了适用于工程设计的建议计算方法,并与国内外规范计算结果进行了比较。结果表明:该理论分析模型的适用性较好,建议计算方法对工程设计有一定的适用价值。
Based on the experimental research and theoretical analysis, this paper makes a preliminary exploration on the mechanical behaviors of the cross-section of the double-angle steel. The effects of the slenderness ratio, limb width ratio and the bearing capacity on the bearing capacity are investigated respectively. According to the theory of thin plate energy and the principle of virtual work, the formula of the ultimate bearing capacity of components is deduced, and the proposed calculation method suitable for engineering design is proposed and compared with the calculated results at home and abroad. The results show that the theoretical analysis model has good applicability, and the proposed calculation method has certain applicable value to engineering design.