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Development of double-stage yielding coupling beam damper
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.
Highlighs A novel double-stage yielding coupling beam damper (DYCBD) is proposed. DYCBD consists of parallelly arranged shear and bending components. Three specimens were tested to investigate the behavior of the DYCBD. Specimens exhibited good hysteretic behavior and double-stage yielding effect. The proposed design method is validated by finite element parametric analysis.
Development of double-stage yielding coupling beam damper
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.
Highlighs A novel double-stage yielding coupling beam damper (DYCBD) is proposed. DYCBD consists of parallelly arranged shear and bending components. Three specimens were tested to investigate the behavior of the DYCBD. Specimens exhibited good hysteretic behavior and double-stage yielding effect. The proposed design method is validated by finite element parametric analysis.
Development of double-stage yielding coupling beam damper
Pan, Peng (author) / Cao, Yingri (author) / Wang, Haishen (author) / Sun, Jiangbo (author)
2020-05-11
Article (Journal)
Electronic Resource
English
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