6-8 ASSESSMENT OF TRAIN-INDUCED DYNAMIC RESPONSE OF GIRDER RAILWAY BRIDGES IN THE REPUBLIC OF UZBEKISTAN: A REVIEW OF METHODS AND A DIAGNOSTIC FRAMEWORK

Abstract

The paper reviews methods for assessing the dynamic effects of moving loads on girder railway bridge spans. Spectral analysis, mode shape identification, damping estimation, operational modal analysis and free-decay analysis are compared in terms of their capabilities and limitations. The review discusses factors affecting the reliability of vibration-based diagnostics and the application of these methods to existing bridges.

Keywords: railway bridge, girder span, moving load, vibration diagnostics, mode shapes, damping, structural condition