Analytical models for the initial stiffness and ultimate moment of a double angle connection

This study investigates the moment–rotation relationship of a double angle connection and proposes two simplified analytical models for predicting the initial stiffness and ultimate connection moment. These are considered to be the most influential parameters affecting the connection behavior. In addition, this study provides some basic data that can be used by structural designers to choose the most appropriate prediction equation for the moment–rotation relationship of a double angle connection and to design such a connection more precisely. Experimental tests and a three-dimensional nonlinear finite element analysis are performed.