Optimal parameter configuration for estimating natural frequencies of bridge using stochastic subspace identification with frequency bands separation method

Abstract

In recent years, studies to detect bridge damage from changes in vibration characteristics have been conducted. We studied estimation method of bridge natural frequency using stochastic subspace identification (SSI) with frequency bands separation method. However, the optimal values of some parameters have not been determined. And determining the parameter requires the judgement of engineer. In this study, a method of determining these parameters is examined, and we combine the results of this study and previous study to propose a calculation method of bridge natural frequency.