Vibration characteristics of frozen soil under moving track loads |
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| Authors: | AiPing Tang AnPing Zhao and AiHua Wen |
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| Institution: | Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin, Heilongjiang 150090, China;School of Civil Engineering, Heilongjiang University, Harbin, Heilongjiang 150080, China;China Academy of Archit;Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin, Heilongjiang 150090, China;School of Civil Engineering, Heilongjiang University, Harbin, Heilongjiang 150080, China;School of Science, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China |
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| Abstract: | Vibration due to moving traffic loads is an important factor which induces frozen soil damage; this paper analyzed these vibration characteristics of frozen soil foundation under track loads. Firstly, seismic observation array (SOA) technology was applied to monitor the three dimensional dynamic characteristics of frozen soil under movable track load in a permafrost region and seasonal frozen soil area. Secondly, a numerical simulation for the response of frozen soil under movable track load was performed based on finite element analysis (FEA). The results show that dynamic characteristics of frozen soil in perpendicular and parallel direction of the track are obviously different. In the direction perpendicular to the track, the vertical acceleration amplitude had an abrupt increase in the 9-10 m from the track line. In the direction parallel to the track, the acceleration in vertical and horizontal direction had a quick attenuation compared to the other direction. Lastly, various parameters were analyzed for the purpose of controlling the dynamic response of frozen soil and the vibration attenuation in frozen soil layer. |
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| Keywords: | moving track load dynamic response seismic observation array (SOA) permafrost seasonal frozen soil |
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