Earthquake-Induced Vibration Measurement and Inverse Analysis of Bell-Shaped Pagoda

Abstract

Ancient historic buildings are constructed with antiquated construction techniques. Hence, they are vulnerable to an earthquake and require appropriate seismic strengthening. To complete the task, dynamic parameters are needed. This study proposes an inverse analysis to identify the dynamic properties of the structure. The proposed algorithm uses Newmark’s time stepping method with the Gauss-Newton scheme. An earthquake-induced vibration of a selected pagoda was recorded by pre-installed two accelerometers, which were used to perform the inverse analysis. The average acceleration and linear acceleration of Newmark’s scheme were adopted, and the obtained dynamic properties were compared. The results show that the dynamic structural parameters from the two methods are comparable. The values of natural frequency are in the range obtained from the previous study.