上海交通大学学报

上海交通大学学报 ›› 2012, Vol. 46 ›› Issue (01): 64-68.doi: 10.16183/j.cnki.jsjtu.2012.01.014

所属专题： 王建华教授学报发文专辑

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施工振动下基于黏弹性边界的地下结构动力特性模拟

禹海涛1,2(), 袁勇2,3, 朱毅敏4, 王建华1   

  1. 1.上海交通大学土木工程系，上海 　200030
    2.同济大学 地下建筑与工程系
    3.同济大学 岩土及地下工程教育部重点实验室，上海 　200092
    4.上海建工集团第一建筑有限公司，上海 　200120
  • 收稿日期:2011-07-27 出版日期:2012-01-01 发布日期:2012-01-30
  • 作者简介:禹海涛（1983-)，男，河南省泌阳县人，博士，目前主要从事地下结构动力学研究．电话（Tel.):021-62932915; E-mail: yuhaitaobest@163.com.
  • 基金资助:
    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)

Dynamic Modeling of Underground Structure Based on Viscoelastic Boundaries under Construction Vibration

YU Hai-tao1,2(), YUAN Yong2,3, ZHU Yi-min4, WANG Jian-hua1   

  1. 1.Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200030, China
    2.Department of Geotechnical Engineering
    3.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
    4.Shanghai No. 1 Construction Co. Ltd. , Shanghai 200120, China
  • Received:2011-07-27 Online:2012-01-01 Published:2012-01-30

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摘要：

结合上海市人民广场地铁换乘大厅枢纽工程，建立了基于黏弹性边界的三维有限元分析模型，利用Newmark数值方法对在拆除临时混凝土支撑振动条件下结构的动力特性进行研究，并将数值计算结果与现场监测结果进行比较．结果表明：所建立的基于黏弹性边界的数值模型不仅能够较好地模拟施工振动下结构的动力特性，消除土体与结构交界面的振动波虚假发射；而且可以预测激励荷载下结构发生共振的可能性．

关键词: 拆撑振动, 地下结构, 黏弹性边界, 动力特性

Abstract:

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.

Key words: demolition vibration, underground structure, viscoelastic boundary, dynamic characteristics

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