Finite Element Model updating of a prestressed concrete continuous bridge based on dynamic monitoring

摘要

The finite element model modified technique based on optimization principle is benefit for the model updating of the large bridge structures. By the ambient vibration test information provided by health monitoring system of huanghe bridge II in baotou, this article adopted corrected parameter based on structural eigenvalue sensitivity analysis to update the bridge dynamic model. The fundamental vibrational frequency of updated finite element model is more closer to the measured result under ambient excitation, which indicates that the optimization algorithm provided by large-scale general software can carry out the model updating effectively.