Extended end-plate moment connections are used in a number of applications including the beam-to-column connections in seismic moment resisting frames (MRFs) and replaceable link-to-frame connections in eccentrically braced frames (EBFs). While the extended end-plate connections have been extensively studied for MRF applications, little is known about their performance in EBFs. The loading conditions and the acceptance criterion are different for these connections when they are used in MRFs or in EBFs. This paper presents an experimental and numerical study undertaken to investigate the performance of extended unstiffened and stiffened end-plate connections used in replaceable shear links. Pursuant to this goal, 10 nearly full-scale EBF tests were conducted where the thickness, width and stiffening of the end-plate were considered as the variables. The results showed that end-plates designed according to the AISC guidelines or Eurocode provisions show acceptable performance in terms of the target link rotation angle. Due to strain hardening effects, thinner plates than the ones suggested by the codes were also found to show satisfactory performance. Finite element simulations were conducted to investigate the bending strains for different plate thicknesses and to study the levels of axial forces developed in the links. Modifications to the AISC design guidelines have been proposed to determine the plastic resistance of end-plated connections more accurately.

扩展的端板力矩连接被用于许多应用中，包括抗震力矩框架（MRF）中的梁到柱连接以及偏心支撑框架（EBF）中可替换的连杆到框架连接。尽管扩展的端板连接已针对MRF应用进行了广泛研究，但对其在EBF中的性能知之甚少。当它们用于MRF或EBF中时，这些连接的载荷条件和验收标准是不同的。本文提出了一项实验和数值研究，以研究可更换剪切杆中使用的扩展的未加劲和加劲的端板连接的性能。为了达到这个目标，进行了10次近乎全面的EBF测试，其中将端板的厚度，宽度和刚度视为变量。结果表明，根据AISC准则或Eurocode规定设计的端板在目标连杆旋转角度方面表现出可接受的性能。由于应变硬化作用，还发现比规范建议的薄的钢板表现出令人满意的性能。进行了有限元模拟，以研究不同板厚的弯曲应变，并研究链节中产生的轴向力水平。已提出对AISC设计指南的修改，以更准确地确定端镀连接的塑性阻力。还发现比规范建议的板更薄的板表现出令人满意的性能。进行了有限元模拟，以研究不同板厚的弯曲应变，并研究链节中产生的轴向力水平。已提出对AISC设计指南的修改，以更准确地确定端镀连接的塑性阻力。还发现比规范建议的板更薄的板表现出令人满意的性能。进行了有限元模拟，以研究不同板厚的弯曲应变，并研究链节中产生的轴向力水平。已提出对AISC设计指南的修改，以更准确地确定端镀连接的塑性阻力。