Vibration characteristics of frozen soil under moving track loads
Vibration characteristics of frozen soil under moving track loads作者机构:Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology)Ministry of Education School of Civil EngineeringHeilongjiang University China Academy of Architecture and Building School of ScienceHarbin Institute of Technology
出 版 物:《Research in Cold and Arid Regions》 (寒旱区科学(英文版))
年 卷 期:2015年第7卷第4期
页 面:414-420页
核心收录:
学科分类:081401[工学-岩土工程] 08[工学] 0814[工学-土木工程]
基 金:supported by the National High Technology Research and Development Program of China (863 2008AA11Z104)
主 题:moving track load dynamic response seismic observation array (SOA) permafrost seasonal frozen soil
摘 要: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 per- mafrost 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.