Optimal Design for Toggle Brace Damper Systems Based on Virtual VD Modal

Abstract

Viscous damper (VD) is a kind of speed dependent damper without stiffness. It has the advantages of strong energy dissipation ability, no additional stiffness and multifunctional vibration reduction, which can absorb and dissipate seismic vibration and wind-induced vibration efficiently. In this paper, the geometric parameter optimization model of the reverse toggle brace viscous damper is established. A virtual VD model with additional damping ratio is put forward, based on which a VD priority placement analysis method is developed. And then the optimal design for toggle brace damper systems is proposed. The VD system of a super tall building structure is designed using the proposed method. It’s revealed that the geometric parameters are optimized by the proposed method, and under the premise of satisfying a series of design constraints, the deformation magnification coefficients of VD is close to the maximum value, which improves its working efficiency effectively; the VD priority placement analysis method proposed in this paper can obtain the priority arranging order of VD efficiently and accurately; the optimal design method for toggle brace damper systems designs VD in two directions at the same time, which considers the mutual action of VD in different directions, compared with traditional method, it’s more efficient and accurate.