SI기법 적용에서의 모델 선택 문제

초록

A methodology of selecting an optimal model is proposed for applying a SI method effectively. Instead of using a reduced finite element model, a reasonably detail finite element model is established first and then the model is identified by estimating its structural parameters. To satisfy the identifiability criterion, a parameter grouping scheme is applied to control the number of unknowns. Among the simulated member grouping cases, an optimal model is selected as the one with the minimal error. Some statistical criteria are introduced and their efficiencies in determining an optimal model are compared through simulation study. The proposed approach has been examined through simulation studies on a single span box-girder bridge.