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薄壁楔形工字型构件的性能主要由板的宽厚比、构件长细比和楔率决定。对这三者的交互作用效应进行了理论性研究。分析中构建了一个考虑几何非线性的非线性有限元模型,选择具有不同翼缘和腹板宽厚比的大量构件(不同的构件长度和楔率),得出了完整的极限强度-长细比曲线,并且分析了不同的破坏模式。基于设计目的,考虑不同的力和弯矩,描绘出一系列交互曲线,基于这些曲线提出了一个通用公式。这些曲线简化了现有的有效宽度的复杂计算,提供了更为弹性的设计方法。
The properties of thin-walled wedge-shaped members are mainly determined by the aspect ratio of the plate, the slenderness ratio of the member and the wedge rate. The interaction between the three effects of a theoretical study. In the analysis, a nonlinear finite element model considering geometric nonlinearity was constructed. A large number of members (different member lengths and wedges) with different flange and web aspect ratios were selected to obtain the complete ultimate strength-slenderness ratio Curve, and analyzed the different failure modes. For design purposes, considering different forces and moments, a series of interaction curves are plotted, and a general formula based on these curves is proposed. These curves simplify the complex calculations of existing effective widths and provide a more flexible design approach.