Shaking Table Test Study Of Anti-buckling Braced Steel Frame And Finite Element Simulation

In order to study the anti-buckling BRB anti-seismic performance in multi-level and high-rise steel structures,a buckling-supported steel frame model structure of three single-The seismic response of the ruler model structure under the action of seismic wave is studied.The dynamic test instrument is used to collect the data to obtain the natural frequency,the seismic spectrum,the damping ratio,the acceleration response,the displacement response of the structure layer,the displacement angle of the structure reaction.Through the comparison between the simulation results and the experimental results,the conclusion is drawn that the peak acceleration of the seismic wave increases,the natural frequency of the structural system decreases,the structural damping ratio and acceleration response increase,and the power amplification coefficient decreases.The higher the floor height,the greater the earthquake response.According to the dynamic similarity relationship,the maximum displacement of the structure is found to be 1/1661 under the effect of frequent earthquakes,and the maximum displacement angle of the structure under the drought condition is 1/243,which meets the deformation requirements of the seismic code.In summary,anti-buckling support-steel frame structure has good seismic performance.