In eccentrically braced frames (EBFs), the link beam is the main factor determining the behavior of this type of system. In order to enhance the ductility and delaying the web and flange buckling, the link beam is reinforced using intermediate web stiffeners to improve its performance and energy dissipation capacity. The web stiffeners spacing criteria is based on short links under pure shear, which have been applied without considering the bending effect on intermediate links. In this paper, first the effects of stiffener details and section geometry on the link behavior are investigated using finite element modeling, and then by proposing an optimization model, new spacing is proposed for stiffeners of intermediate links that is also consistent with bending distribution, and enhances the performance of intermediate links significantly. To further investigate the results of the optimization model and sensitivity analyses results, the behavior of a total of 52 short, intermediate and long links with different lengths and sections is simulated and investigated under cyclic loading based on ANSI/AISC 341-10 (Seismic provisions for structural steel buildings, Chicago, American Institute of Steel Construction, 2010) using ABAQUS. The results show that the section geometry in W-beams affects the stiffeners spacing and thereby, the behavior of intermediate and long links. According to the obtained results in short links, stiffeners spacing are very conservative and can be increased, and for intermediate links, adjusting the stiffeners spacing based on the proposed optimization model can significantly enhance the performance of the link beam.

在偏心支撑框架（EBF）中，链接梁是确定此类系统行为的主要因素。为了提高延展性并延缓腹板和法兰的屈曲，使用中间腹板加劲肋来加固连接梁，以提高其性能和能量消散能力。腹板加劲肋的间距标准基于纯剪力作用下的短链节，该短链节在未考虑中间链节的弯曲效应的情况下应用。在本文中，首先使用有限元建模研究了加劲肋的细节和截面几何形状对连杆性能的影响，然后通过提出一个优化模型，为中间连杆的加劲肋提出了新的间距，该间距也与弯曲分布一致，并且大大提高了中间链接的性能。为了进一步研究优化模型的结果和敏感性分析结果，根据ANSI / AISC 341-10（地震规定），模拟并研究了52个不同长度和截面的短，中和长链节的行为，并对其进行了研究。 ABAQUS，用于钢结构建筑，芝加哥，美国钢结构研究所，2010）。结果表明，W型梁的截面几何形状会影响加劲肋的间距，从而影响中间和长连杆的性能。根据在短连杆中获得的结果，加劲肋间距非常保守并且可以增加，对于中间连杆，基于建议的优化模型调整加劲肋间距可以显着提高连杆梁的性能。