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Sustainability 2018, 10(7), 2439;

Numerical Simulation and In-Situ Measurement of Ground-Borne Vibration Due to Subway System

Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai 200092, China
State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
Author to whom correspondence should be addressed.
Received: 29 June 2018 / Revised: 8 July 2018 / Accepted: 9 July 2018 / Published: 12 July 2018
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A coupled finite element–infinite element boundary method performed by the harmonic analysis based on the commercial software ABAQUS was verified by comparing it with the thin layer method to address the issue of subway induced vibration, a major environmental concern in urban areas. In addition, an interface program was developed to automatically read the simulation result files in the harmonic analysis, and then put the data into MATLAB, achieving the frequency domain analysis. Moreover, a site measurement was performed on a practical engineering track bed-tunnel lining-surrounding formation located on Line 2, Shanghai Metro and rich vibration data were acquired. Then, the corresponding simulation model was established and the numerical results were compared with the measured data based on the developed program, which was verified applicable for the practical engineering of subway induced vibration on the soft site. The proposed prediction formula of the vibration level, by comparison with the measurement, is applicable for the prediction in subway induced vibration. The results show that there exists a vibration amplifying zone a certain distance to the tunnel under high frequency loads due to the wave propagation and reflection. Finally, a parametric study was conducted in an elastic half-space simulation to investigate the influence of model widths and depths with infinite element boundary on the numerical results. The higher performance of the combined finite element–infinite element boundary method, which can decrease the model sizes in widths and heights 50% effectively, was demonstrated. Consequently, the coupled finite element–infinite element boundary method and developed frequency analysis with interface program provide rational numerical methods for the models of subway induced vibration. View Full-Text
Keywords: subway induced vibration; numerical simulations; finite element; infinite element boundary; measurement subway induced vibration; numerical simulations; finite element; infinite element boundary; measurement

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Yang, J.; Li, P.; Lu, Z. Numerical Simulation and In-Situ Measurement of Ground-Borne Vibration Due to Subway System. Sustainability 2018, 10, 2439.

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