Reasonable value and layout optimization of displacement amplification coefficient for toggle-brace-dampers system
For super high-rise shear wall structures with large stiffness and small inter-story displacements,the viscous dampers are arranged in the refuge floors using toggle-brace-dampers,and there are still deficiencies in the value of the amplification coefficient and the arrangement.The toggle-brace-damper is a displacement amplification device,which improves the energy dissipation capacity of the damper by amplifying the axial travel of the damper.From the perspective of geometric analysis,the structural of the reverse toggle-brace-damper vibration mitigation efficiency and arrangement optimization are explored:The analytical equation for the maximum displacement of the damper axis of the reversed device is derived,and the dynamic response of the structure under the device with different arrangement heights and different amplification factors is compared.When the arranged frame span is too large,the dynamic response of the structure before and after the setup is compared by setting up the device of the overhanging truss.The results show that the efficiency of the toggle-brace-dampers system is related to the height and span of the arranged frame,and the theoretical amplification coefficient determined according to the angle is not proportional to the vibration mitigation efficiency of the structure.The structural vibration mitigation efficiency is higher after the optimized arrangement than the original arrangement.The optimized scheme has been verified in actual projects,i.e.,a reasonable selection of the amplification factor and arrangement can improve the additional damping ratio of the structure to a greater extent.
super high-rise structureviscous dampersamplification factortoggle-brace-systemadditional damping ratio
万方数据
维普
