Influence of Impact Factor with Speed of Vehicle Under IRC Class AA and 70R Loading

The impact factor is a critical parameter in bridge design, representing the additional dynamic forces that moving vehicles impose on the structure. This paper explores the influence of vehicle speed on the impact factor under two important loading conditions as per the Indian Road Congress (IRC) guidelines: IRC Class AA and 70R loading. Using theoretical approaches and Finite Element Method (FEM) simulations, we analyze how vehicle speed modifies the impact factor, leading to variations in structural response. The results highlight the relationship between vehicle speed, loading class, and impact factor, emphasizing the need for accurate dynamic modeling in bridge design.