Shaking Table Test Of The Small Wild Goose Pagoda Model And The Analysis Of Finite Element

As a significant status in the whole Chinese ancient buildings,ancient pagodas are carrier of Chinese 5000 year historical civilization,and was known as the outstanding ancient Chinese high-rise building,these achievements are attributed to wisdom of ancient labors,and they are also mankind’s precious historical and cultural heritage.The small wild goose pagoda,a representative dense canopy tower,is located in Xi’an,it has withstood the damage of thousands years of wind and rain,man-made and natural disasters,its structure has different degrees of damages,and the seismic performance is poorer,so it is important to take measures for seismic protection.Firstly,there was a field investigation about the historical changes of the small wild goose pagoda,at the same time,there was also a comprehensive on-site detection,and this paper studied the structural form of the small wild goose pagoda,material composition and the existing cracks.Secondly,Based on the practical investigation data of the analysis of the small wild goose pagoda prototype structure of the small goose pagoda,and according to the main characteristics of the model of small goose pagoda,then,combining with the existing test conditions obtain the law of similarity,which will be used in model design,is deduced according to Buckingham’π theorem,then a model structure,with a similar coefficient of l/10,was designed and fabricated.Then the shaking table test method was adopted to investigate the mechanical properties and vibration performances of the small wild goose pagoda in many working conditions.Finally,the finite element software ANSYS was used to establish the finite element model of The model structure of small goose pagoda and the prototype structure and seismic response characteristics are obtained by time history analysis of the structure of the small wild goose pagoda,exploring the natural frequency,modal distribution,the response of displacement and acceleration of the small wild goose pagoda,the results are compared with the experimental results,and obtain the finite element analysis results are in good agreement with experiment results.Research results indicate that,the prototype structure of the small wild goose pagoda can basically meet the requirements for seismic resistance in the eight degree earthquake;the part of prototype structure was destroyed especially the deformation in top is larger in mid eight degree earthquake,the deformation of prototype structure exceeded the standard,and beyond the limits of standard in big eight degree earthquake.In above explanation,the structural was damaged seriously,and it needs to take effective measures for seismic protection.In addition,according to the research results in this paper,combining with the present situation of the prototype structure of the small wild goose pagoda and the protection significance,under the principle of " restoring the old as the old ","to protect the first",discussing the new way to improve the seismic performance of the small wild goose pagoda and obtaine some meaningful research conclusions and advice.The project research not only provides theoretical basis and technical support for seismic protection of the small wild goose pagoda,but also has some reference significances in the protection and restoration of other historic buildings.