Evaluation of Train Speed and Axle Load Increase on Railway Bridges

Document Type : Original Article

Authors
Seyed Danial Mousavi 1
Jabbar Ali Zakeri 2
Seyed Javad MirMohammad Sadeghi 2
meysam jahanghiri 3
1 Ph. D, Student, School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran.
2 Professor, School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran.
3 School of Railway Engineering - Iran University of Science and Technology-Tehran
10.22034/road.2024.463118.2295
Abstract
Increasing the speed and axle load of the train in the country's rail network is one of the most important factors in attracting and transporting more passengers and cargo compared to the previous situation and other transportation methods. The construction of new lines and structures with the aim of increasing the speed and axle load of the train requires spending a lot of money, so investigating the possibility of increasing the speed and axle load of the train on the existing bridges is the aim of this study. This study takes into account the frequency of bridges with concrete slab decks, which make up 57% of the various structural systems in Iran's railway network. Initially, we created a three-dimensional finite element model of the bridge and the train, accounted for the interaction between the line and the train, and validated it using the results of a valid field trial. We investigate how increasing the train's speed and axle load affect the bridge's vertical displacement and vertical acceleration. The results indicate that an increase in speed and axle load enhances the bridge deck's response, yet it deviates from the regulatory standards for vertical displacement and vertical acceleration.
Keywords
Train Speed
Axle Load Increase
Track and Train Interaction
Railway Bridge
Finite Element Model
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