双线隧道中单侧隧道内爆炸引起地面建筑的动力响应及滑移隔震研究
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摘要
该文针对双线地铁隧道中单侧隧道内爆炸引起的附近地面建筑物的动力响应及滑移隔震效应进行了数值模拟研究。采用八结点等参元和集中质量体系来分别模拟包含隧道的有限土区和地面多层建筑,并将其耦合形成整个相互作用体系模型。在基底摩擦力计算中提出修正连续摩擦力模型,以克服传统Coulomb摩擦力模型的内在缺陷。通过与单线隧道内爆炸引起建筑物响应及滑移隔震效应的算例对比分析,揭示出地表建筑物在遭受地下单侧隧道内爆炸产生的经相邻隧道反射及衍射后的冲击波作用所引起的动力响应特征及其基底滑移隔震效果,从而为相关的理论研究和工程实践提供重要的数据参考。
This paper gives a numerical analysis for dynamic responses and sliding base-isolation of a building on the ground to an explosion inside one of two-way tunnels. The models of the finite tunnel-included soil zone and the aboveground multi-storey building are formed respectively by means of the eight-node isoparametric finite element technique and mass-lumped system method, and then coupled together to establish the whole interaction one. In the calculating of sliding friction on the base, a modified continuous friction model is proposed in order to overcome the inherent disadvantages of the traditional Coulomb friction model. In comparison with some data under the one-way tunnel condition, example results for responses of an aboveground building with or without a sliding base-isolated measure under blast waves, generated by an explosion inside one of the two-way tunnels and reflected or refracted around the adjacent tunnel, show some new characteristics and isolated effects, which can provide some important references for the related theoretical research and engineering practice.
This paper gives a numerical analysis for dynamic responses and sliding base-isolation of a building on the ground to an explosion inside one of two-way tunnels. The models of the finite tunnel-included soil zone and the aboveground multi-storey building are formed respectively by means of the eight-node isoparametric finite element technique and mass-lumped system method, and then coupled together to establish the whole interaction one. In the calculating of sliding friction on the base, a modified continuous friction model is proposed in order to overcome the inherent disadvantages of the traditional Coulomb friction model. In comparison with some data under the one-way tunnel condition, example results for responses of an aboveground building with or without a sliding base-isolated measure under blast waves, generated by an explosion inside one of the two-way tunnels and reflected or refracted around the adjacent tunnel, show some new characteristics and isolated effects, which can provide some important references for the related theoretical research and engineering practice.
引文
[1]李忠献,刘杨,田力.单侧隧道内爆炸荷载作用下双线地铁隧道的动力响应与抗爆分析[J].北京工业大学学报,2006,32(2):173―181.Li Zhongxian,Liu Yang,Tian Li.Dynamic response and blast-resistance analysis of double track subway tunnel subjected to blast loading within one side of tunnel[J].Journal of Beijing Polytechnic University,2006,32(2):173―181.(in Chinese)
[2]田力,李忠献.地下爆炸冲击波引起的基底滑移隔震建筑的动力响应[J].爆炸与冲击,2004,24(1):16―23.Tian Li,Li Zhongxian.Dynamic responses of sliding base isolated buildings subjected to shock wave of underground explosion[J].Explosion and Shock Waves,2004,24(1):16―23.(in Chinese)
[3]李忠献,田力.地下爆炸波作用下基底滑移隔震建筑-土-隧道相互作用的动力分析[J].工程力学,2004,21(6):56―64,35.Li Zhongxian,Tian Li.Dynamic interaction analysis of sliding base-isolated building-soil-tunnel subjected to underground explosion wave[J].Engineering Mechanics,2004,21(6):56―64,35.(in Chinese)
[4]俞茂宏,马国伟,王一兵.砖混建筑结构基础隔震分析[J].建筑结构学报,1996,17(4):52―59.Yu Maohong,Ma Guowei,Wang Yibing.Analysis of base isolation of brick masonry building structure[J].Journal of Building Structures,1996,17(4):52―59.(in Chinese)
[5]王勖成,邵敏.有限单元法基本原理和数值方法[M].第2版.北京:清华大学出版社,1997.Wang Xucheng,Shao Min.Fundamentals and numerical methods of finite element method[M].Second Edition.Beijing:Tsinghua University Press,1997.(in Chinese)
[6]Lysmer J,Kuhlemeyer R L.Finite dynamic model for infinite media[J].Journal of the Engineering Mechanics Division,ASCE,1969,95(4):859―877.
[7]Baker W E,Cox P A,Westine P S.Explosion hazards and evaluation(Fundamental studies in engineering5)[M].Amsterdam,the Netherlands:Elsevier Scientific Publish-ing Company,1983.
[8]Mostaghel N,Davis T.Representations of coulomb friction for dynamic analysis[J].Earthquake Engineering and Structural Dynamics,1997,26(5):541―548.
[9]樊剑,唐家祥.带限位装置的摩擦隔震结构动力特性及地震反应分析[J].建筑结构学报,2001,22(1):20―25.Fan Jian,Tang Jiaxiang.Dynamic characteristics and earthquake response analysis of structures supported on slide-limited friction base isolation system[J].Journal of Building Structures,2001,22(1):20―25.(in Chinese)
[10]Smith P D,Mays G C,Rose T A.Small scale model of complex geometry for blast overpressure assessment[J].International Journal of Impact Engineering,1992,12(3):345―360.
[11]龚晓南.土塑性力学[M].杭州:浙江大学出版社,1990.Gong Xiaonan.Plasticity mechanics of soil[M].Hangzhou:Zhejiang University Press,1990.(in Chinese)
[2]田力,李忠献.地下爆炸冲击波引起的基底滑移隔震建筑的动力响应[J].爆炸与冲击,2004,24(1):16―23.Tian Li,Li Zhongxian.Dynamic responses of sliding base isolated buildings subjected to shock wave of underground explosion[J].Explosion and Shock Waves,2004,24(1):16―23.(in Chinese)
[3]李忠献,田力.地下爆炸波作用下基底滑移隔震建筑-土-隧道相互作用的动力分析[J].工程力学,2004,21(6):56―64,35.Li Zhongxian,Tian Li.Dynamic interaction analysis of sliding base-isolated building-soil-tunnel subjected to underground explosion wave[J].Engineering Mechanics,2004,21(6):56―64,35.(in Chinese)
[4]俞茂宏,马国伟,王一兵.砖混建筑结构基础隔震分析[J].建筑结构学报,1996,17(4):52―59.Yu Maohong,Ma Guowei,Wang Yibing.Analysis of base isolation of brick masonry building structure[J].Journal of Building Structures,1996,17(4):52―59.(in Chinese)
[5]王勖成,邵敏.有限单元法基本原理和数值方法[M].第2版.北京:清华大学出版社,1997.Wang Xucheng,Shao Min.Fundamentals and numerical methods of finite element method[M].Second Edition.Beijing:Tsinghua University Press,1997.(in Chinese)
[6]Lysmer J,Kuhlemeyer R L.Finite dynamic model for infinite media[J].Journal of the Engineering Mechanics Division,ASCE,1969,95(4):859―877.
[7]Baker W E,Cox P A,Westine P S.Explosion hazards and evaluation(Fundamental studies in engineering5)[M].Amsterdam,the Netherlands:Elsevier Scientific Publish-ing Company,1983.
[8]Mostaghel N,Davis T.Representations of coulomb friction for dynamic analysis[J].Earthquake Engineering and Structural Dynamics,1997,26(5):541―548.
[9]樊剑,唐家祥.带限位装置的摩擦隔震结构动力特性及地震反应分析[J].建筑结构学报,2001,22(1):20―25.Fan Jian,Tang Jiaxiang.Dynamic characteristics and earthquake response analysis of structures supported on slide-limited friction base isolation system[J].Journal of Building Structures,2001,22(1):20―25.(in Chinese)
[10]Smith P D,Mays G C,Rose T A.Small scale model of complex geometry for blast overpressure assessment[J].International Journal of Impact Engineering,1992,12(3):345―360.
[11]龚晓南.土塑性力学[M].杭州:浙江大学出版社,1990.Gong Xiaonan.Plasticity mechanics of soil[M].Hangzhou:Zhejiang University Press,1990.(in Chinese)
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