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提出新的理论模型,用于评估加劲外伸钢梁-柱端板连接的弯矩-转角(M)关系。根据对端板连接转动的定义,将端板连接分解为多个组成部分,包括面板区、螺钉、端板和柱翼缘。并对各个组成部分完整的加载-变形过程进行了分析。最后通过整合各个部分的反应得出整个连接件的加载-变形过程。此外,通过5个节点试验验证这个分析模型。对计算与试验结果比较可以得出,该分析模型可以准确评估端板连接的转动能力、弯矩-转角曲线和初始转动刚度。而且,它还可以分析对节点转动变形起作用的其他因素,如面板区的剪切变形、螺钉的拉长、端板和柱翼缘的弯曲变形等。该分析模型同时提供弯矩-剪切转角(Ms)和弯矩-缝隙转角(Mcp)曲线,这些曲线为详细分析端板连接的转动性能提供了可靠的基础。
A new theoretical model is proposed to evaluate the moment-angle (M) relationship of stiffened outrigger beams and columns. Based on the definition of endplate rotation, the endplate connection is broken down into components, including the panel area, screws, endplates, and column flanges. The complete loading-deformation process of each part is analyzed. Finally, through the integration of the various parts of the reaction to obtain the entire connector load - deformation process. In addition, this model is validated by a five-node test. Comparing the calculated results with the experimental results, it can be concluded that the analysis model can accurately evaluate the rotation ability, bending moment-rotation curve and initial rotation stiffness of the end plate. Furthermore, it can analyze other factors that contribute to the rotational deformation of the joint, such as shear deformation of the panel area, elongation of the screw, bending deformation of the end plate and the column flange, and the like. The analysis model provides both the bending moment-shear angle (Ms) and bending moment-gap turning angle (Mcp) curves, which provide a reliable basis for detailed analysis of the rotational performance of the end plate connection.