Study On The Influence Of Traffic Vibration On The Stone Structure Of Ancient Buildings

As an important part of China’s cultural heritage,ancient architecture is the crystallization of the wisdom of China’s working people,reflecting the architectural level and the level of economic and cultural development.In today’s society,ancient buildings are not only of ornamental value,but also of great significance to the study of Chinese history and culture.With the development of China’s economic level and the increase of urban population,the traffic demand also increases,and the impact of traffic vibration on the surrounding environment is more and more obvious.Traffic vibration is a long-term repeated vibration,which will lead to wall cracking,damage accumulation,strength reduction and other problems in the surrounding buildings.But the ancient buildings have a long history,the material strength is reduced,some even have appeared damage,affected by traffic vibration is more obvious.Nongjiangsuo is the state key cultural relics protection units,after more than 600 years,lingxingmen for its gate.Under the effect of increasing road traffic and subway,it will cause fatigue damage of lingxingmen and red sandstone walls,and even lead to shortened life and even damage.This paper takes lingxingmen and red sandstone wall of nongjiangsuo as the research object,and discusses the influence of road traffic on it under the action of rail transit.The main work is as follows:(1)The vibration response of lingxingmen was monitored to obtain the vibration response signal and acceleration time-history signal under the action of road traffic and the first evil superposition of road traffic.Based on the method of vibration signal processing,with the help of MATLAB software,the vibration signal is processed by dedirect current,smoothing and detrend term,and the vibration component is more close to the actual.(2)Based on the random vibration theory and with the help of MATLAB software,the frequency domain analysis of the processed vibration signals is carried out to obtain the dominant frequency of the structure under the action of subway.(3)With Digital Image Correlation technique(DIC),lingxingmeng door crack monitoring area and red sandstone wall area,get the crack area vibration under the action of "opening" displacement curve,lingxingmeng door and red sandstone wall displacement and strain measurement area as a whole,according to foreign relevant displacement control standards,to evaluate lingxingmeng door and red sandstone wall.(4)With the help of large finite element software ABAQUS,the three-dimensional finite element model of lingxingmen structure was established,and the transient analysis of the structure was carried out with the measured ground time-history curve as the input excitation,so as to obtain the numerical influence analysis of subway superimposed pavement traffic on lingxingmen and the strain size of the crack area.According to the national standard and relevant derivation formula,the traffic vibration response of lingxingmen was evaluated.