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ground vibration analysis under combined seismic and high-speed train loads

Underground Space 2022年第3期7卷 363-379页

作者： Wei Xie Guangyun Gao Jian Song Yu Wang Department of Geotechnical Engineering&Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education Tongji UniversityShanghai 200092China Zhejiang Engineering Research Center of Marine Geotechnical Investigation Technology and Equipment Zhejiang Huadong Construction Engineering Corporation LimitedHangzhou 310014China Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering College of Civil and Transportation EngineeringHohai UniversityNanjing 210098China Department of Civil and Environmental Engineering The University of AucklandAuckland 1010New Zealand

The rise of high-speed railway induces an increased probability of serious derailment accidents of operating high-speed trains during earthquakes.A two-and-half-dimensional finite element model(2.5D FEM)was developed to investigate the ground vibration under combined seismic and high-speed train *** examples were demonstrated and the proposed method was turned out to provide an effective means for estimating ground vibration caused by high-speed train load during *** dynamic ground displacement caused by combined seismic and high-speed train loads increases with the increase of the train speed,and decreases with the increase of the stiffness of ground *** with the seismic load alone,the coupling effect of the seismic and high-speed train loads results in the low-frequency amplification of ground *** moving train load dominants the medium–high frequency contents of the ground vibration induced by combined *** is observed that the coupling effects are significant as the train speed is higher than a critical *** critical train speed increases with the increase of the ground stiffness and the intensity of the input earthquake motion.

关键词： Seismic load High-speed train load 2.5D FEM ground vibration Seismic intensity ground stiffness Critical train speed

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