抄録
This paper discusses the effect of parameter determination in the structure system identification with respect to the accuracy and the robustness of identification. Structural characteristic of a FE model of an arch bridge is identified by three output-only identification methods, the eigensystem realization algorithm (ERA), the ERA with data correlation (ERA/DC) and the stochastic subspace identification (SSI), with changing parameters in the process. The accuracy and the robustness of each method are evaluated by comparing the identified characteristics with the FE model parameter and its eigenvalue analysis. Proper parameters have been derived from the analysis trials, and a new applied identification method has been proposed.
