Simplified Design Method of Viscous Damping Frame Structure Based on Preset Damping Distribution Mode

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (12) : 175-181.

LIU Shuai1,PAN Chao2,ZHOU Zhiguang3

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Abstract

A design method based on performance requirements and conceptual optimization for viscous damping frame structures was proposed to simplify the design process of damping parameters of such damping structures.In order to make energy dissipation of the damper more effectively, it was assumed conceptually that the distribution of damping parameters along the floor is positively correlated with the story drift angle, and the distribution expression of damping parameters was given.Under this preset damping distribution model, the relationship between the equivalent additional damping ratio of multi-story damping structure and the additional damping parameters of each layer was derived.Combined with the performance-based design concept, it was proposed that the damping ratio is taken as the damping design goal, and the required additional damping ratio of the damping structure can be determined according to the relationship between the damping ratio and the damping attenuation of the seismic design response spectrum.Combined with the distribution expression of preset damping parameters, the required damping parameters of each layer can be calculated quickly.The damping design and seismic performance checking calculation of a frame structure with viscous dampers were carried out.It was shown by the design example that the method has clear design goal, simple calculation process and reasonable parameter configuration.

Key words

Damping control / Viscous damper / Preset damping distribution mode / Performance requirements;

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LIU Shuai1,PAN Chao2,ZHOU Zhiguang3. Simplified Design Method of Viscous Damping Frame Structure Based on Preset Damping Distribution Mode[J]. Journal of Vibration and Shock, 2019, 38(12): 175-181

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