STRUCTURAL RESPONSE OF BAILEY BRIDGE SPANS UNDER MOVING VEHICLE LOADS

Abstract

Bailey truss bridges are commonly used as temporary structures in emergency traffic situations, such as rescue operations and the repair of aging bridges. Studying the impact of load velocity on bridge structures is essential for determining appropriate operational conditions. This article examines the effect of vehicle speed on the internal forces of truss members and the deflection of the bridge span. The study employs the finite element method using SAP2000 software, the moving load model has an axial load diagram of the real truck. The results indicate that vehicle velocity has a minimal impact on the internal forces of the truss members and the deflection of the bridge spans. Based on these findings, suitable vehicle velocity regulations can be established to optimize traffic flow across the bridge when necessary.