HAN Junyan,WAN Ningtan,ZHAO Mi,et al.Research on Site Dynamic Response and Vibration Attenuation under the Vibration Loading of Subway[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(01):191-199.
HAN Junyan,WAN Ningtan,ZHAO Mi,et al.Research on Site Dynamic Response and Vibration Attenuation under the Vibration Loading of Subway[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(01):191-199. DOI: 10.13409/j.cnki.jdpme.201912085.
Research on Site Dynamic Response and Vibration Attenuation under the Vibration Loading of Subway
The vibration of the site has a significant impact on adjacent buildings and precision instruments due to the subway operation. A two-dimensional finite element model of the subway tunnel-soil interaction system was established based on the ABAQUS software to study the dynamic response of the site under the vibration loading of the subway, and its validity was verified by field test monitoring data. Then the effects of tunnel burial depth, soil damping ratio, and soil non-uniformity on the soil surface vibration characteristics and attenuation laws are analyzed by analyzing the peak speed and acceleration time history of the site surface vibration. The results show that the dynamic response of the soil surface decreases as the increase of the tunnel burial depth and the damping ratio of the soil within a certain range; the dynamic response of the ground surface of the site under different soil conditions has some difference, but the differences gradually decrease with the increase of the distance. Based on the above parameter analysis, MATLAB is used to fit the peak velocity attenuation curve, and the prediction formula of site vibration attenuation is given, which provides a reference for the selection of vibration-sensitive building sites.
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