An experimental investigation and assessment of structural vibrations in bridges and rail induced by train loads

Abstract

The vibration of bridge and rail structures under train loads plays an important role in assessing the durability, safety and operational performance of railway infrastructure. This study conducted an experimental analysis to compare the vibration response of bridge and rail structures under train loads. Vibration data were collected from both the span and rail structures using an accelerometer system. Important parameters such as natural frequency, amplitude and damping characteristics were analyzed to show the differences in structural responses. The results showed that the bridge vibration had a lower frequency but larger amplitude, while the rail vibration had a higher frequency due to the direct influence of wheel-rail interaction. The study also evaluated the effects of train speed, axle load and structural conditions on the overall vibration. Through analyzing, evaluating and comparing the experimental results of bridge and rail vibrations, the study creates a premise to propose solutions to reduce vibrations and optimize structures to improve the life and safety of the bridge and rail system.

Keywords: Bridge vibration, rail vibration, train load, experimental analysis.