Abstract
AbstractDynamics of bridge-vehicle interaction is a very complex process due to the effects track components and dynamics of wheel load. The generalized parameters include span, stiffness of bridge, axle load, bending of rail, eccentricity of load, irregularities of track, bearing stresses of wheel load due to moving locomotive, dynamic properties of wheel assembly and increase in impact loading with speed involves in the evaluation of the dynamic impact factor. The current codes established a simple multiplication impact factor known as coefficient dynamic augment (CDA) depending only on the span of bridge which does not implicate all the factors responsible. Therefore, this paper focuses on the parameters influences on the classical and modern approach on the prediction of impact factor for railway bridges. Based on the detailed literature, it is observed that the parameters such as length of span, velocity of locomotive and stiffness of the girder is crucial for the evaluation of the impact factor. It is also observed that components, which is an occurrence of real-life conditions, which are not considered in the past literature. It is concluded that classical approach underestimates the value of impact factor as variation in average values calculated is about 15%. Therefore, the generalized expression considering the length of span, velocity of locomotive and stiffness of the girder for the prediction of dynamic impact factor is recommended for the future design of railway bridges.KeywordsImpact factorCoefficient of dynamic augmentInternational perspectiveModern approach
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
