Shaking Table Test And Analysis On Cold-formed Thin-Walled Steel Structure Building

In order to understand the seismic behavior and design method of cold-formed thin-walled steel structure buildings systematically,a full-scale cold-formed thin-walled steel residence was designed to investigate the seismic performance of cold-formed thin-walled steel residences through experimental methods,finite element analysis and engineering project analysis.The main research contents of this paper are as follows:(1)The test specimen was a full-scale model of cold-formed thin-walled steel structure in this paper.The components of the model were selected according to actual engineering application and prefabricated construction was used.The frequencies of the natural vibration before and after the earthquake were determined by sweeping the structure with white noise.The Taft seismic wave,the El centro seismic wave,and an artificial wave RG1 were selected according to the site type and characteristic period.The acceleration and displacement response of the model were analyzed under frequently occurred,basic,rare earthquake level of 7 degree intensity and rare earthquake level of 8 degree intensity.(2)According to the experimental model,the detailed model and the simplified model were established through the finite element software ABAQUS.The results of the numerical analysis of the detailed model and simplified model were compared with the experimental results.After verifying the correctness of the modeling method,14 models were established to study the influence of some factors,such as different type of panels,diagonal brace between studs,opening ratio of walls,number of layers,number of spans,ratio of length to width and plan layout form of the structure on seismic performance of the residence.And modal analysis and nonlinear time history analysis were performed to provide reference for practical engineering design.(3)Taking the actual project as the background and according to the results of the finite element analysis,the optimal structural form in the 9 degree intensity seismic zone was selected.3 seismic waves,BigBear seismic wave,Mammoth Lake seismic wave and artificial wave Artwave-RH4TG065,were selected to perform nonlinear time history analysis of the model under rare earthquake level of 9 degree intensity.The results of time history analysis and calculation were compared to provide a basis for the promotion of cold-formed thin-walled steel structures.(4)The seismic design methods of panel types of composite wall,diagonal brace between studs,the cross-section of end studs,structural form of hold-downs,lintel structurem,plan layout of the structure and connections were summarized to provide reference for promoting cold-formed thin-walled steel structures widely used in high-intensity seismic regions.Through the shaking table test,finite element analysis and combination with actual project,it was verified that the cold-formed thin-wall steel housing could meet the seismic requirements of the 9-degree intensity seismic area,and the results could provide experimental basis and theoretical guidance for engineering applications.