Time Domain Calculation of Vortex Induced Vibration of Long-Span Bridges by Using a Reduced-order Modeling Technique

Abstract

A time domain strategy for calculating the vortex-induced vibration (VIV) of bridges is proposed in this study. The strong coupling of fluid-structure interactions during VIV is modeled by using a reduced order modeling (ROM) technique. Then the prototype VIV response of the bridge is calculated through combing the reduced order model with the finite element method. A real bridge is involved as a case study and is validated through data from field measurements. The proposed strategy is independent of the structural mass-damping parameter and the influence of actual flow conditions, for example slowly time-varying wind velocity during VIV, can also be taken into account in the calculation, which is far beyond the capacity of traditional semi-empirical models.