Time-Domain Finite Element Model Updating for Operational Monitoring and Damage Identification of Bridges

The well-known limitations of modal system identification methods have led to a broad exploration alternative solutions for operational monitoring and damage diagnosis structures. This study presents time-domain Bayesian finite element model updating approach jointly identify the vehicular loads modeling parameters bridges using vibration data location vehicles traversing bridge as input. A is devised verified through series case studies based on numerically simulated from prestressed reinforced concrete box-girder model. Damage states are defined degradation delamination, steel corrosion, loss prestressing force. Ten different scenarios, encompassing range minor localized major distributed damage, examined. responses damaged under random traffic scenarios. acceleration responses, along with bridge, used estimating loads. estimated then infer extent within bridge. results show successful performance proposed in environment.