Wireless-Based Identification and Model Updating of a Skewed Highway Bridge for Structural Health Monitoring
Leqia He, Edwin Reynders, Jaime H. García‐Palacios, Giuseppe Carlo Marano, Bruno Briseghella, Guido De Roeck
Abstract
Vibration-based monitoring was performed on a short-span skewed highway bridge on the basis of wireless measurements. By means of operational modal analysis, highly accurate modal results (frequencies and mode shapes) were extracted by using a self-developed wireless acquisition system, for which the performance was verified in the field. In order to reproduce the experimental modal characteristics, a refined finite element model was manually tuned to reduce the idealization errors and then updated with the sensitivity method to reduce the parametric errors. It was found that to build a reliable Finite element (FE) model for application in structural health monitoring, the effects of superelevation and boundary conditions of a skewed bridge should be taken into account carefully.