Study On Seismic Performance Of Concentrically Braced Multi Story Light Steel Structure

China advocates the development of green buildings vigorously,and the light steel structure is a form of structure that practices the idea of green architecture.From the prefabrication in the factory to the construction and the life time,the characteristics of energy conservation and pollution abatement are fully reflected.The current application of light steel structure is concentrated in the lower structure.And with the growth of the population and the development of the economy,the demand for huge housing is urgently need to be met.The traditional construction mode of high energy consumption and waste of resources leads to the status quo of construction scale limitation.It is urgent to popularize it to high level architecture.Combining with the actual background of earthquake in China and the threat posed by the earthquake,it is necessary to study the seismic performance of light steel structure to improve its safety.In this paper,the development and characteristics of light steel structure are reviewed,this article also describes the central support situation and several analytical methods of seismic theory.These methods include modal analysis,reaction spectrum method and time-path analysis method.The basic principle of finite element method and the whole process of unit analysis,integral analysis and final calculation are introduced.Then,the light steel structure model is built by SAP2000 software,the seismic performance of light steel structure is studied by means of the above analysis method.On the basis of the seismic study of structures.In this paper,the method of energy consumption structure is analyzed to meet the target of shock absorption and disaster reduction.This paper expounds the characteristics of this new concept of shock absorber.A basic model is established in this article.Three models were obtained by adding Chevron support and X-shape support in the infrastructure.In the modal analysis of the structure,the numerical value of the period and quality participation coefficient is obtained through software analysis.We determine the translational mode and torsion vibration mode of the structure through the data.By comparing the size of the lateral stiffness of the original structural model and the reinforced support state,it is proved that the support can enhance the seismic performance.In the comparison between the two supporting models,the more advantageous option is determined.Simulation of bi-directional seismic action on the structure to obtain the displacement response spectrum analysis on numerical size to identify whether the structure can meet the mandatory provisions of the relevant provisions in seismic code,and then compare the results of the analysis through the data,enhance the level of support for the real effect of reducing the floor under earthquake displacement of how to determine the support rod on the seismic the performance of the.As well as the difference between different support levels to analyze their advantages and disadvantages.The three kinds of waves which include el-centro wave,Taft wave and Tangshan wave are used to analyze the elastic time process of the multi-earthquake earthquake and the nonlinear time-path analysis under the earthquake.According to the results of the data,whether the maximum interlayer displacement Angle of the structure meets the mandatory requirements in our country.The results show that the seismic effect can be improved greatly under the same seismic wave.