Seismic response analysis of frame-shear wall structure with dual-energy dissipation mechanism

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (5) : 151-157.

LUO Weigang1,2, LIU Jibin3, SONG Jiangpeng1, QI Pan1

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Abstract

Rocking wall system has been widely studied, but due to the relaxation of the wall bottom constraint, the anti-side stiffness decreases, resulting in the overall deformation of the structure too large, not meeting the security requirements. In order to solve this problem, the buckling restrained brace（BRB）can yield without buckling under the action of tension and pressure, then the BRB is used as the connecting member of the frame and the wall, and metallic damper (MD) is set at the bottom of the wall to double control the structural deformation of the lower limit value, enhance the energy dissipation of the structure and reduce the seismic response of the structure. In this paper, a six-story concrete frame-shear wall, for example, using the finite element software ABAQUS and combined with UMAT secondary development interface of PQ-Fiber user subroutine, established the frame-shear wall structure model, the framework of different yield strength BRB rocking wall to wall with different stiffness of metallic damper model, through dynamic elastic-plastic time history analysis, to study the seismic performance of the structure. The results show that the seismic response of the frame rocking wall structure is greatly improved under the control of the double energy dissipation element of BRB between the frame and the shear wall and MD at the shear wall base, and which are in a proper range of properties.

Key words

the double energy dissipation mechanism / burial structure system；rocking wall / buckling-restrained brace / metallic damper / seismic performance

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LUO Weigang1,2, LIU Jibin3, SONG Jiangpeng1, QI Pan1. Seismic response analysis of frame-shear wall structure with dual-energy dissipation mechanism[J]. Journal of Vibration and Shock, 2022, 41(5): 151-157

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