| China’s architectural history has a long history.For thousands of years,various buildings have been born,of which the ancient masonry pagoda is an important component.Whether in terms of design style or construction level,ancient masonry pagodas are outstanding representatives of ancient Chinese architectural art.With the passage of time,although there are still a large number of ancient masonry pagodas standing on the land of the motherland,the problem of inclination generally exists.It is a very important work to identify and protect the safety of these ancient masonry pagodas.At present,scholars at home and abroad have carried out extensive research on the seismic performance,inclination correction and reinforcement of ancient masonry pagodas,while the research on the safety evaluation of ancient masonry pagodas is relatively few,and the research on the impact of inclined development on the safety of ancient masonry pagodas is even less.Taking the safety appraisal of Huqiu tower in Suzhou as the engineering background,this paper mainly carried out field investigation and test and finite element simulation analysis in the research process.In the field survey and test stage,the disease survey,architectural drawing and structural drawing mapping,material parameter detection,dynamic characteristic field test and other work were carried out,and the basic situation of Huqiu tower was mastered,which provided data support for the establishment and improvement of subsequent finite element model;In the stage of finite element simulation analysis,firstly,the three-dimensional geometric model of Huqiu tower is established according to the structural size obtained from the mapping.After importing this model into the finite element software,the finite element model is formed.Using this model,the stress and deformation of the ancient tower under different load conditions and different inclination angles are analyzed,the parts prone to damage are found,and these dangerous parts are analyzed.According to the related work of safety appraisal of Huqiu pagoda,the work flow of safety evaluation of ancient masonry pagoda is summarized,and the specific contents and precautions of each stage are explained.The safety grade evaluation method based on the bearing capacity and interlayer displacement is proposed.The safety of the ancient masonry tower is evaluated through different grades,and the basis for the division of each grade is explained.Then,this evaluation method is applied to Huqiu tower,the safety grade of Huqiu tower is obtained,and the reinforcement and protection suggestions are put forward according to the safety grade and the results of finite element analysis.Finally,by adjusting the overall tilt angle in the finite element model,the safety status of the parts prone to damage during tilt development is analyzed to illustrate the impact of tilt development on Huqiu tower. |
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