This study was conducted to propose analytical models that can predict the initial stiffness and plastic moment capacity of an unstiffened top and seat angle connection. These analytical models were developed by considering the moment-rotation curves, plastic hinge lines, and failure modes of an unstiffened top and seat angle connection. In the development of these analytical models, the effects of the prying action and the moment-shear interaction of a top angle were also considered. Application feasibility of these analytical models was verified by comparing these models’ results with those obtained from using the Chen-Kishi and Faella models, as well as the Nethercot experimental test data. Four tests were conducted to obtain the moment-rotation curves and failure modes of an unstiffened top and seat angle connection under shear.

中文翻译：

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剪切载荷下未加劲的顶部和座椅角连接的初始刚度和塑性弯矩能力的分析模型

进行这项研究是为了提出可以预测未加劲的顶部和座椅角连接的初始刚度和塑性弯矩能力的分析模型。这些分析模型是通过考虑力矩-旋转曲线，塑料铰链线以及未加硬的顶部和阀座角连接的失效模式而开发的。在开发这些分析模型时，还考虑了撬动作用和顶角的弯矩－剪力相互作用的影响。通过将这些模型的结果与使用Chen-Kishi和Faella模型获得的结果以及Nethercot实验测试数据进行比较，验证了这些分析模型的应用可行性。进行了四个测试，以获得在剪切作用下未加劲的顶部和阀座角连接的力矩-旋转曲线和破坏模式。