The Research Of Damping Performance To The High-rise Steel Frame Structure With Displacement-type Dampers

Every year about 5 million earthquakes occur in the world,which not only bring huge direct economic losses,but also cause serious casualties.With the rapid development of traditional seismic theory,the method of structural vibration control have gradually made great breakthrough and application,one of the simple and effective shock absorption measures to set the damper device for high-rise steel frame structure.Displacement damper can be divided into two kinds: metal damper and friction damper,whether set the metal damper or friction damper in the high-rise steel frame structure,its essence to provide additional damping to the structure,the consumption of energy of seismic wave input,to ensure the safety and reliability of the structure.In this paper,lists the categories of displacement damper device and the advantages and disadvantages as well as the development situation in recent years,introduces the basic principle and the damping restoring force model,which based on consulting a large number of displacement type damper device of domestic and foreign literature.Based on the experiment of Yuan Bo et al in the space structure research center of Guizhou University,defined the new hole size of metal damper,pseudo static loading test analysis by the finite element analysis software,to obtain their hysteresis parameters.Set the damper to one common of five layers steel frame structure by the connection unit of the finite element software SAP2000,the hysteretic curve of the damper is spindle shaped,and the dissipated energy is about 2/3.The paper also analyzes the twelve story high-rise steel frame structure,there are four kinds of operating modes in this structure,uncontrolled structure model,the structure of the friction damper is set up,the structure model of the metallic damper is set up and the structural models of the two kinds of dampers are set up.Three kinds of seismic waves such as El Centro wave,Taft wave and artificial wave are selected according to the site classification and characteristic period characteristic cycle of the building structure,using the finite element analysis software SAP2000 to simulation analysis under the action of frequent earthquake and strong earthquake for the various working condition of the structure.The analysis results show that the floor displacement between layers,angle of floor displacement between layers,floor maximum acceleration,floor maximum shear force and energy curve in the case of earthquake response,the energy dissipation brace can only play a supporting role,the seismic energy dissipation of the structure is the best when the metal dampers are set,and the seismic energy consumed by these three kinds of seismic waves is respectively 44.55%,39.39%,44.44%,and the structure is not in the plastic range.In the case of rare earthquake response,the two dampers can play a good energy dissipation performance,the best damping effect in structure set two types of dampers,seismic energy in these three kinds of seismic wave and its consumption were 20.91%,18.39%,21.82%,the stage structure of the parts are plastic development.