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To investigate the influence of end-plate stiffeners on the initial rotational stiffness of extended end-plateinternal joints, an experimental program was carried out to investigate the rotational behavior of the joints. Two finiteelement methods (FEMs) were proposed using ABAQUS software. The stress distribution, plastic development, anddeformation characteristics of extended end-plate joints were determined from a comparison of the results of experimentsand numerical analyses, and a calculation method for the initial tensile stiffness of the end-plate stiffener was proposed.This investigation presented herein demonstrates that (1) the angle and thickness of the stiffener strongly influence theinitial tensile stiffness of the joint; and (2) component-based FEMs can accurately reflect the entire loading process ofjoints in a simple and efficient manner.

Experimental Study and Comparative Numerical Analysis of the Mechanical Behavior of Extended End-Plate Connections with End-Plate Stiffeners