Dynamic Characteristic Analysis Of Zhunti Temple Under Traffic Vibration

This paper takes Yangzhou municipal cultural relics protection units Zhunti Temple Tripitaka Pavilion as the object of study. The method of environment random vibration excitation technique (pulsating method) is chosen to actual test which is nondestructive to structure and by ANSYS to analyze and simulate it. This paper focuses on the analysis of dynamic characteristics of Zhunti Temple Tripitaka Pavilion under ground traffic vibration effect and the measures for improving the accuracy of dynamic test. On the basis of Tripitaka Pavilion ground traffic vibration monitoring, ground traffic vibration of Tripitaka Pavilion effects were studied. The variation rule is researched and analyzed of the ground traffic load caused horizontal vibration acceleration and vertical vibration acceleration in the height direction of the structure. According to the national standard (GB 10070-88, GB/T 50452), influence on the ground traffic vibration on the Pavilion of the Tripitaka is synthetically evaluated. At the same time, Modal parameters of Zhunti Temple Tripitaka Pavilion through the actual dynamic response data obtained from monitoring are compared with the results of finite element simulation analysis. It provides reference basis for further structural damage, seismic capacity identification, repair and reinforcement. The main research contents are as follows:1) By combining the detailed history and archaeological data, the paper analyzes the origin, development, classification and structure characteristics of the ancient architecture;2) Access to relevant departments to provide the original records and repair records, through field investigation and mapping, Zhunti Temple Tripitaka Pavilion building structure characteristics, the damage and reinforcement, repair conditions are realized and the geometric dimensions of structure are gotten;3) By pulsating method to test and analyzing collected data signal, the natural frequency, damping ratio and vibration mode of the ancient building are obtained, the key technology and other factors of the impact on the structure of the wood structure are obtained;4) By research and analyze,the variation rule of horizontal and vertical vibration acceleration amplitude in vertical direction of Zhunti Temple Tripitaka Pavilion is concluded. The results show that the horizontal and vertical acceleration amplitude in vertical direction were enlarged. The radial and tangential vibration caused by traffic are compared. It is found that the same point radial vibration amplitude caused by ground transportation vibration is larger than tangential vibration amplitude; According to the current national standard (GB 10070-88 and limit of GB/T-50452) provisions of the vibration value of ground traffic vibration caused by Zhunti Temple Tripitaka Pavilion vibration evaluation; Final results showed that the vibration amplitude of Zhunti Temple Tripitaka Pavilion meet specification requirements, no vibration and vibration reduction measures should be taken;5) By using scientific computing software ANSYS, the beam element model of Tripitaka Pavilion is established according to the spatial structure system to simulate the dynamic characteristics of structure. Through modal analysis the structure modal parameters (natural frequency, mode shape) is obtained. The simulation results are compared to experimental data.The results show that experimental data and modal parameters are matched. Further the reliability of environmental random vibration technology is verified.