The Seismic Response Research Of The Plane Irregular Steel Frame Structure With Different Braces

High-rise building is the economic prosperity and progress of science and technology and the product of new materials, new technology development. In recent years, the quantity of high-rise buildings increases rapidly, the height has improved and structure has changed a lot. At present, many kinds of construction steel continuous promotion and popularization, the steel has a uniform texture, high strength, good ductility, excellent mechanical properties, easy to produce, lots of irregular high-rise steel structure building have been built. China is an earthquake disaster-prone country. Therefore, the seismic research of irregular high-rise steel structure has an important practical significance.The present development of steel structures is introduced in this paper, advantages as well as the development of high-rise steel structure from country to country. And then introduce the earthquake damage of steel structure and the steel frame supporting system,including the classification of the braces. For the theory and method of seismic research,this paper made relevant introduction, mainly about several common seismic theories.Next, structure is researched for finite element analysis. Finite element analysis is also using the large finite element analysis software SAP2000, different high-rise steel frame supporting structures are carried out through a series of analysis. Results are researched and analyzed. According to seismic vibration technology, setting up corresponding damping measures, then analysis the energy dissipation of this damping model.In this paper, the structure belongs to irregular plane steel frame supporting structure.So respectively four structures are established, including two kinds of supporting system,one is the center supporting system, the other is eccentric support system. These models are arranged with different support. The cycle, frequency, mass quality participation factor of the four kinds model structure were obtained through modal analysis, then observe the flat twist and cycle characteristics.Through the response spectrum analysis, obtained floor displacement and displacement between layers and interlayer displacement Angle of the four models, and analyze the different support types and the influence of seismic performance. Through the linear time history analysis, obtained the structure’s relevant parameters of seismic response EL-Centro, TAR_TARZANA wave and artificial wave, through the analysis of the date, we find that setting support in the middle position has better seismic performance.Through the dynamic nonlinear analysis to the first structure, we get the floor displacementof the structure and the interlayer displacement Angle, analyzes its deformation characteristics under nonlinear time history analysis.In order to study the effect of shock absorption, energy consumption in the first model structure viscous damper is set up. Under the effect of nonlinear dynamic time history,research the structure of the energy dissipation damping performance. Compared with the structure not set energy shock absorbing devices, observe the shock absorption effect.