An Analytical Approach to Coupled Vibration of Curved Rationalized Girder Bridges and Running Vehicles

AbstractThis study is intended to develop an analytical approach to simulate the coupled vibration of bridges and running vehicles, and to investigate the dynamic characteristics of rationalized curved bridges. In this paper, a curved twin Igirder bridge with general cross-section is adopted for the analysis. As a preliminary step, a general large dump truck with one axis at front and two axes at rear is modeled as a sprung-mass system with 2-degree-of-freedom for the vehicle-bridge interaction analysis. The coupled vibration of the interaction system is formulized and a computer program is developed. Eigenvalue analyses are carried out for different types of bridges to find acceptable torsional stiffness. The coupled vibration of the running vehicle and the bridge is simulated using the developed analytical approach, based on which the dynamic responses of the curved bridge are evaluated