Pseudo-Dynamic Test Study Of Steel Frame Structure Of Traditional Style Buildings

The ancient Chinese architecture,which condenses the wisdom and spirit of the Chinese nation for thousands of years,is a treasure of Chinese culture.With the progress of society and the development of science and technology,The defects of traditional ancient buildings in fire prevention and corrosion prevention are becoming more and more obvious,The traditional style architecture with modern science and technology and historical culture began to rise in the field of Chinese architecture.However,there is no mature design which is suitable for the traditional style architecture in the current code,so it is necessary to study the seismic performance of the traditional style building.In order to understand and study the seismic performance and damage form of the traditional style building,This research group is based on a traditional style building in the area where the seismic fortification intensity is 8 degrees,a test model of a steel frame structure with a scale ratio of 1:2 was made and a quasi-dynamic test was carried out.The displacement,the acceleration response,the skeleton curve,the hysteretic energy dissipation of the structure and so on are analyzed by applying El Centro wave,Taft wave,Lanzhou artificial wave and Wenchuan wave with different peak acceleration.The experimental results show that under the action of four kinds of seismic waves with peak accelerations of 70 gal and 200 gal,the structure is completely in the elastic deformation stage.Under the action of El Centro wave and Wenchuan wave with a peak acceleration of 400 gal,the structure is basically in the elastic deformation stage.Under the action of Wenchuan wave with a peak acceleration of 620 gal,the part of the brackets is yielded.The whole structure enters the elastic-plastic stage and the overall working performance is good and there is no obvious damage.The hysteretic energy consumption has increased considerably The yield of bucket has played an important role in the substantial increase in energy consumption.At this time,the maximum interlaminar displacement angle of the structure is 1/203,and the skeleton curve still has an upward trend,which shows that the traditional style architectural steel frame structure has stronger lateral resistance and higher bearing capacity.In order to further analyze the seismic performance and failure modes of the structure under the action of seismic waves,the dynamic elastic-plastic time history analysis of the experimental model under the action of Wenchuan wave is carried out by finite element analysis software ABAQUS.According to the calculated results,the displacement response and the acceleration response calculated by the dynamic time history analysis have high agreement with the experimental results,and the rationality of the finite element modeling and analysis is explained.According to the stress distribution of Wenchuan wave 800 gal and 1000 gal of dynamic and plastic time-history analysis,it can be seen that with the increase of peak acceleration,the bucket of the model structure firstly yielded,and then the beam yielded,and finally the column bases yielded,it is satisfied the "strong column weak beam,strong node weak component " of the seismic fortification requirements,the bracket act as the first seismic line under the action of earthquake.In this paper,through the experimental study and finite element analysis,the research results can provide some reference for the further study of seismic performance of traditional style buildings and practical engineering application.