Seismic Inversion And Seismic Performance Analysis Of Thatbynnyu Temple In Bagan

Unlike the traditional masonry pagoda architecture in China,Thatbynnyu Temple represents the masonry structure of the Upper Buddhist pagoda temple,Its structure is more complex,and the seismic mechanism is also reflected in the complexity of its spatial form,structural system,force transmission mode and material.Under the great initiative of Chinese “Belt and Road” strategy,the study of Thatbynnyu Temple,one of the carriers of Bagan civilization and culture in Myanmar,can promote the integration of various cultures.Therefore,it is particularly important to study the seismic performance and failure mechanism of Thatbynnyu Temple.This article combines the site survey and earthquake damage data,using the method of dynamic characteristic test and finite element simulation calculation to carry out the seismic inversion analysis date of Thatbynnyu Temple,which is one of the most representative in Bagan,Myanmar.The situation between simulation results and the existing structural diseases are compared,and the seismic damage mechanism is discussed and analyzed.（1）In view of the complexity of the structural characteristics of the Thatbynnyu Temple,based on the test results of the basic period and frequency of the dynamic characteristics,the numerical analysis method is used to carry out inversion analysis of the material and structural dynamic characteristics,and the elastic model reflecting the structural damage is obtained.（2）The static push-over method is used to carry out push-over analysis on the structure of the Thatbynnyu Temple.The weak parts of the structure are obtained through the displacement response and stress cloud diagram under the push-over effect.According to the statistical analysis of the cross-sectional dimensions of each layer of the structure It is concluded that the main reason for the large displacement mutation of the structure is the stiffness mutation caused by the decrease of the vertical section.（3）The response spectrum method is used to analyze the seismic performance of the Thatbynnyu Temple.The performance of the structure under earthquake action is evaluated through the displacement response of the structure and the inter-story displacement angle.It is concluded that the dangerous and weak parts of the structure are more consistent with the actual earthquake damage.（4）The damage mechanism of three typical earthquake disasters of Thatbynnyu Temple are analyzed and discussed,also summarizes and classifies the damage modes and corresponding reinforcement methods of the ancient masonry pagoda,and the corresponding reinforcement and protection measures according to the actual situation of Thatbynnyu Temple are put forward.