Abstract This paper proposes a new type of steel double-stage yielding coupling beam damper (DYCBD), which consists of a shear component and two bending components. Two types of components have different yield displacements. Both DYCBD components are steel dampers with I-shaped cross section. The shear component first yield corresponding to a moderate earthquake, while the bending components do not yield until a major earthquake occurs, which results in the double-stage yielding behavior of the DYCBD. The constitutive model and design method of DYCBD were proposed. Three specimens with different geometries were designed and conducted shear hysteretic tests. The experimental results revealed that specimens exhibited stable hysteretic behavior and double-stage yielding effect. Finite element models (FEMs) were established to explain the deviations between the calculation results and the experimental results, and parameter analysis were carried out. The components stiffness ratio of 0.52 is suggested to achieve the most obvious double-stage yielding effect. A minimum moment of inertia ratio between bending components' flange to total section of 0.83 is also suggested to decrease the deviations between the proposed design method and FEM as a result of parametric study.

中文翻译：

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双级屈服连梁阻尼器的研制

摘要 本文提出了一种新型钢双级屈服连梁阻尼器（DYCBD），它由一个剪切组件和两个弯曲组件组成。两种类型的组件具有不同的屈服位移。DYCBD 的两个组件都是具有 I 形横截面的钢制阻尼器。剪切分量首先屈服对应于中等地震，而弯曲分量直到发生大地震时才屈服，这导致DYCBD的双阶段屈服行为。提出了DYCBD的本构模型和设计方法。设计了三个不同几何形状的试样并进行了剪切滞后试验。实验结果表明，试件表现出稳定的滞后行为和双阶段屈服效应。建立有限元模型（FEMs）解释计算结果与实验结果的偏差，并进行参数分析。建议构件刚度比为 0.52，以获得最明显的双阶段屈服效果。作为参数研究的结果，还建议弯曲部件的法兰与总截面之间的最小惯性矩比为 0.83，以减少所提出的设计方法与有限元法之间的偏差。