Seismic Performance Analysis Of Common Structures With Different Kinds Of Dampers

This paper is a study on energy dissipation structure design method in actual3D model. In this paper, a series of research on energy dissipation structure is carried out, mainly including the comparison of different kinds of dampers in several common structures, the calculation of energy dissipation structure for structure design, and the optimal method for damper design. The specific contents are as follows:(1)Compare the damping effect of different kinds of dampers. The damping effect of steel damper, friction damper, linear and non-linear viscous damper installed in steel frame, concrete frame, frame-shear wall or frame-tube structure is compared. The influence of earthquake strength and wave property to dampers is recorded, under the condition of same max damper force and similar total damper force. The research indicates, the damping effects in order from good to bad are steel frame, concrete frame, frame-shear wall and frame-tube structure. Friction damper and nonlinear viscous damper works better than other damper in frames, while viscous damper if more fit for frame-shear wall and frame-tube structure.(2)Check calculation of supplemental damping ratio. Calculate the damper supplemental damper ratio of friction damper and linear viscous damper installed in frame and frame-shear wall structure with Chinese Code Method, Damped Free Vibration Method and Seismic Reduction Factor Method. And check the results in equivalent linear model. The result shows that the supplemental damping ratio calculating method only considering the main period works well in frame structure in which shear deformation mainly generated in earthquake.(3)Arrange and optimize the damper in structure by SSSA Method. The effect of damper distribution of SSSA Method and Position Parameter Method are compared with uniformly-spaced distribution. The Change law of damping effect by damping number is investigated in a steel frame and a concrete frame. Under the research above, the paper suggests take the ratio of total damper force to base shear force of structure in which dampers haven been installed as the target of damper number. A formula to calculate the upper effective damper number target was created and approved with some reasonable assumption. It shows that the SSSA Method performs well in reducing story drifts between different stories. The formula for the upper effective damper number target works well when it was applied to frames with different heights and periods.