FE MODELING OF A STEEL PLATE TWIN GIRDER BRIDGE USING PARTICLE FILTER

Abstract

This paper discusses about on-site long term monitoring static and moving vehicle experiments on a composite twin girder bridge, and also investigates validity of an FE model constructed utilizing assumed structural properties from existing inspection documents as well as a visual inspection. The feasibility of a particle filter aided FE mode updating was also examined. In the model updating, the frequencies for the first and second bending modes were considered as design variables in the cost function.Those identified parameters from the model updating were compared with those from material experiments of which specimen were obtained formt the observation bridge. Observations showed that the roller support was not functioning due to deterioration. The updated FE model led to comparable results with those from field experiments.