Study On The Vibration Response Of Yaoshange In Ke Garden Excited By Road Traffic Loads

Ancient buildings are an important part of our country historical and cultural heritage. They not only embody the wisdom and industrious of the working people in our country, but also reflect the broad and profound of ancient architecture’s art and the exquisite skills of construction in China. Although the ancient architectures have been built for a long time, the architectural arts they contains still provide a rich source of inspiration to the development of the modern national architectural art of our country, and they also provide reference to the construction of modern architecture.At present, most preserved ancient architectures in our country, although have experienced varying degrees erosion and damage by natural and man-made as the time by, the structures of them are still stable as a whole. However, as the economy level of our country has unceasing enhanced, the living standard of people have constantly improved, the scope of people’s activities has become more and more widely, and the urban road traffic has become more and more bustling, one of the problems cause by urban traffic is traffic vibration influence on surrounding environment, it has become a problem need to be solved and cannot be ignored, the vibration of surrounding buildings cause by road traffic is a kind of long-term repeated vibration, it will cause foundation setting, wall cracking, structure damage and other problems to the neighboring buildings. Due to the ancient architectures have no special seismic design, under the action of the natural environment for such a long time, the architectures have been suffered varying degrees of damage, then with traffic vibration effects, the structure damage will be further accumulate. Thus, in order to better protect the ancient architectures, it is necessary to do further research on the influence of the ancient architectures caused by road traffic vibration.Ke Garden is a famous historical and cultural tourist attraction in Dongguan and it is national historical and cultural heritage and it has been built for 160 years, Yaoshan pavilion in Ke Garden is its representative buildings, Under the effect of increasing road traffic, the traffic may cause fatigue damage to the structure of Yaoshan pavilion, and due to the original injury of it, the traffic may shorten the life of the structure and even cause damage. This article take the Yaoshan pavilion in Ke Garden as the research object, investigate the influence of road traffic vibration on it. Mainly has carried out the following research work:(1)Monitoring the continuous vibration response of Yaoshan pavilion in Ke Garden at a typical period of time, obtain the road traffic vibration response signal that are acceleration time history signal and speed time history signal. Based on vibration signal processing method and with the help of MATLAB software platform, through the steps: DC removal, date smoothing and remove the trend, eliminate the interference ingredients of monitoring signals, so as to get the real data, prepare for the study of road traffic vibration response.(2)Based on random vibration theory and with the help of MATLAB software platform, do time-domain analysis and frequency-domain analysis on the processed road traffic vibration response signal respectively. By using the theory of statistical analysis analyze the monitoring results of time-domain, obtain the characteristic value of probability and statistics with 95% confidence level of vibration response acceleration and velocity amplitude, and take it as the index of vibration response evaluation. Based on frequency-domain analysis, study the frequency distribution of the vibration response, draw the amplitude-frequency curves of vibration acceleration.(3)Based on the directly measured vibration response signals, using random decrement method got free vibration attenuation responses of Yaoshan pavilion, take this responses as the input signals, using ITD method and MATLAB software platform identify the modal parameter of Yaoshan pavilion.( 4) Using large-scale finite element analysis software ANSYS, build the three-dimensional finite element model of Yaoshan pavilion, and do modal analysis, get its natural frequencies and corresponding vibration cycle. With the help of ANSYS software establish the 3d finite element model of Yaoshan pavilion and its soil foundation, exert typical traffic random loading to the model, obtain it traffic vibration response under different speed, through the analysis of simulation results, obtain the influence that the road traffic vibration cause to Yaoshan pavilion and vibration propagation law. Contrastive analysis and research the results of measured traffic vibration response results and finite element simulation results of Yaoshan pavilion.