Research on High-Speed Train Load Spectrum and Bridge Load Effect Spectrum

Abstract

Based on ANSYS finite element analysis software, a dynamic model of the Beijing-Tianjin intercity railway car-track-bridge system is established to analyze the dynamic response of the bridge under the normal high-speed double-track traffic conditions. Combined with the statistics of actual train operation, the bridge load spectrum represented by wheel/rail force is obtained. With the aid of the rain-flow counting method, the stress data of the weak part of the bridge span is equivalently converted into variable amplitude stress amplitude and the corresponding cycle times are obtained. In this way, the stress spectrum of the Beijing-Tianjin intercity railway bridge in the use reference period is estimated, which provides a certain reference basis for the life assessment of the in-service bridge and the reinforcement of weak parts in the future.