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本文通过两种、四榀不同剪跨比的钢筋混凝土双肢柱在恒定垂直偏心荷载作用下的拟动力试验研究和理论分析，考察了双肢柱在水平地震力作用下裂缝出现、刚度变化、破坏状态及动力反应全过程，探讨了腹杆形式、数量及节点的合理设计对双肢柱抗震性能的影响，提出了裂缝出现后拉、压肢刚度的计算公式，并采用杆系模型、增量法对平腹杆双肢柱进行了弹塑性分析，为编制冶金抗震设计规范提供了依据。
In this paper, the pseudo-dynamic test and theoretical analysis of two kinds of reinforced concrete double-limb columns with different shear-span ratio under the effect of constant vertical eccentric load are used to investigate the appearance of cracks and stiffness changes of the two-limb columns under horizontal seismic force. In the whole process of damage and dynamic response, the influence of the rational design of the web form, number, and joints on the seismic performance of the two-limb columns was discussed. The formulas for the stiffness of the pull and the compression limbs after the occurrence of cracks were proposed, and the rod model was used. The elasto-plastic analysis of the double-limb columns of flat-abdominal rods was performed by the quantitative method, which provided the basis for the preparation of the seismic design specifications for metallurgy.