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《Journal of Shanghai Jiaotong University》 2012-01
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Dynamic Modeling of Underground Structure Based on Viscoelastic Boundaries under Construction Vibration

YU Hai-tao1,2a,YUAN Yong2b,ZHU Yi-min3,WANG Jian-hua1(1.Department of Civil Engineering,Shanghai Jiaotong University,Shanghai 200030,China;2a.Department of Geotechnical Engineering,2b.Key Laboratory of Geotechnical and Underground Engineering ofMinistry of Education,Tongji University,Shanghai 200092,China;3.Shanghai No.1 Construction Co.Ltd.,Shanghai 200120,China)  
A three-dimensional finite element model based on viscoelastic boundaries was developed to effectively capture the dynamic behavior of the metro transfer hall hub of the People's Square.Dynamic characteristics of the underground structure during vibration induced by dismantling temporary reinforced-concrete supporting system were studied,resorting to the Newmark method.In-situ monitoring data were used to calibrate the proposed method in this paper.The results show dynamic characteristics of the underground structure under vibration loading are accurately simulated by the presented model based on viscoelastic boundaries,and thus spurious reflections on the interface of soil and structure can be effectively eliminated.Prediction on the possibility of structural resonance under vibration loading can also be made by the proposed model,which is of benefit to decision making of engineering design and construction.
【Fund】: 国家“十一五”科技支撑计划项目(2011BAG07B01);; 国家自然科学基金项目(50838004);; 同济大学土木工程学院光华基金资助;; 长江学者和创新团队发展计划资助(IRT1029)
【CateGory Index】: TU93;TU311.3
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