Dynamic Interaction Analysis between Horizontally Curved Twin I-girder Bridge and Moving Vehicle

摘要

Bridge-vehicle interaction dynamics of horizontally curved I-girder bridge is, however, a complex phenomenon and is less understood. In this study, extended three-dimensional finite element models of original bridge with considering super-elevation and HS20-44 vehicle are developed by using commercially available ANSYS code. Road surface roughness profiles are generated from power spectral density and cross spectral functions. The models are capable to consider both bridge and vehicle responses with virtually no limitation on the complexity of vehicle and bridge. By using the bridge-vehicle model, free vibration results and various parameter effects on dynamic amplification factor of the studied bridge are extensively investigated. Calculated results give some useful information regarding the impact factor of the studied bridge.