One of the methods for improving the seismic behavior of structures was to use inactive control devices. Recently, in civil engineering applications, a relatively new material named metal foam has been utilized progressively due to its high energy dissipation capability and remarkable axial strain. In this study, several non-linear time-history analyses were conducted for investigating the seismic behavior of steel frames equipped with the composite brace using a three-dimensional (3D) finite element (FE) method. Crushable foam (CF) and elastic-perfectly plastic models were considered for metal foam and steel members. FE results revealed that the maximum drift ratio decreased by 35% and 72% under near-field and far-field records in the steel frames equipped with composite brace compared to the conventional steel brace frames. Employing the composite brace led to prevent global buckling of the brace and consequently decrease in load-bearing capacity. Furthermore, composite brace caused the reduction of bending moment demand in the first-story column by 18%.

改善结构抗震性能的方法之一是使用非主动控制装置。最近，在土木工程应用中，一种名为金属泡沫的相对较新的材料由于其高能量耗散能力和显着的轴向应变而逐渐被使用。在这项研究中，使用三维 (3D) 有限元 (FE) 方法进行了多项非线性时程分析，以研究配备复合支撑的钢框架的抗震性能。金属泡沫和钢构件考虑了可压碎泡沫 (CF) 和完美弹性塑料模型。有限元结果表明，与传统钢支撑框架相比，配备复合支撑的钢框架在近场和远场记录下的最大漂移率分别降低了35%和72%。使用复合支撑可以防止支撑整体屈曲，从而降低承载能力。此外，复合支撑使第一层柱的弯矩需求减少了 18%。