To investigate the collapse behavior of steel frames under the random earthquake, it is essential to grasp the hysteretic behavior of beam members. However, in the large-deformation region, the behavior of beams is difficult to be captured precisely because of the local buckling of the flange plate and the web plate. This paper presents a method to obtain the monotonic curve and the hysteretic curve efficiently for H-shaped beams subjected to bending moment. 96 models for H-shaped beams were designed and analyzed under the monotonic and cyclic loading using finite element analysis. Parameter study was implemented to grasp the influence of width-to-thickness ratio, shear span, and the beam depth. Depending on the numerical analysis, a monotonic model was proposed which can obtain the monotonic curve precisely and efficiently. Consequently, through combining with the modified Ibarra-Medina-Krawinkler hysteretic model, the accuracy for predicting the hysteretic behavior of beams was verified through comparing with the numerical results.

为了研究随机地震作用下钢框架的倒塌行为，掌握梁构件的滞后行为至关重要。然而，在大变形区域中，由于凸缘板和腹板的局部弯曲，难以精确地捕获梁的行为。本文提出了一种有效获得弯矩作用下的H形梁单调曲线和滞后曲线的方法。设计了96个H型梁模型，并通过有限元分析在单调和循环载荷下进行分析。进行参数研究以掌握宽度与厚度之比，剪切跨度和光束深度的影响。根据数值分析，提出了一种单调模型，可以精确，有效地获得单调曲线。所以，