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
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摘要
采用子结构耦合法对由隧道及其周围的有限土体、远场半无限土体以及上部基底滑移隔震建筑等三部分构成的体系在隧道内发生意外爆炸时的弹塑性动力响应进行了数值分析;在基底滑移隔震分析中,提出了修正的连续摩擦力模型以取代传统的库仑摩擦力模型,避免了计算过程中跟踪啮合滑移的过渡边界从而可降低计算误差。通过与 Lysmer 透射边界法和修正阻尼透射边界法的数值结果对比分析,验证了本文方法的有效性,其数值结果揭示了在遭受地下爆炸波作用并考虑土-结构相互作用的基底滑移隔震建筑动力响应的内在规律,从而为深入的理论研究与工程实践提供了重要的依据。
In this paper, dynamic elastic-plastic responses of the interaction system consisting of a tunnel and the around finite soil, the far-field semi-infinite soil and a sliding base-isolated building subjected to an accidental explosion inside the tunnel are numerically analyzed using the coupling method of substructures. In the analysis of sliding base isolation, a modified continuous friction model is proposed to replace the conventional Coulomb friction model, which can avoid tracing the transient boundary between meshing and sliding and reduce the calculating error. The proposed method is verified through the comparison of numerical results using the coupling method with those using the Lysmer viscosity boundary method or the Modified viscosity boundary method. The numerical results offer the insight of the dynamic responses of sliding base-isolated buildings subjected to the underground explosion waves in consideration of the soil-structure interaction. The present work may serve as an important reference for further theoretical research and engineering practice.
In this paper, dynamic elastic-plastic responses of the interaction system consisting of a tunnel and the around finite soil, the far-field semi-infinite soil and a sliding base-isolated building subjected to an accidental explosion inside the tunnel are numerically analyzed using the coupling method of substructures. In the analysis of sliding base isolation, a modified continuous friction model is proposed to replace the conventional Coulomb friction model, which can avoid tracing the transient boundary between meshing and sliding and reduce the calculating error. The proposed method is verified through the comparison of numerical results using the coupling method with those using the Lysmer viscosity boundary method or the Modified viscosity boundary method. The numerical results offer the insight of the dynamic responses of sliding base-isolated buildings subjected to the underground explosion waves in consideration of the soil-structure interaction. The present work may serve as an important reference for further theoretical research and engineering practice.
引文
[1]俞茂宏,马国伟,王一兵,等.砖混建筑结构基础隔震分析[J].建筑结构学报,1996,17(4):52-59YuMaohong,MaGuowei,WangYibing, et al.Analysis of base isolation of brick masonry building structures[J].Journal ofBuildingStructures,1996,17(4):52-59.(inChinese)
[2]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.FanJian,TangJiaxiang.Dynamic characteristics and earthquake response analysis of structures supported on slide-limited friction base isolation system[J].Journal ofBuildingStructures,2001,22(1):20-25.(inChinese)
[3]W E Baker,P A Cox,P S Westine, et al.Explosion hazards and evaluation(Fundamental studies in engineering5)[M].Amsterdam, theNetherlands:ElsevierScientificPublishingCompany,1983.238-243.
[4]P D Smith,G C Mays,T A Rose, et al.Small scale model of complex geometry for blast overpressure assessment[J].InternationalJournal ofImpactEngineering,1992,12(3):345-360.
[5]NaserMostaghel,ToddDavis.Representations ofCoulomb friction for dynamic analysis[J].EarthquakeEngineering andStructuralDynamics,1997,26(5):541-548.
[6]JohnLysmer,RogerL.Kuhlemeyer.Finite dynamic model for infinite media[J].Journal of theEngineeringMechanicsDivision,ASCE,August,1969,95(4):859-877.
[7]沈冯强.改进的阻尼透射边界[J].合肥工业大学学报,1998,21(6):18-21.ShenFengqiang.A modified viscous transmitting boundary[J].Journal ofHefeiUniversity ofTechnology,1998,21(6):18-21.(inChinese)
[8]王勖成,邵敏.有限单元法基本原理和数值方法(第二版)[M].北京:清华大学出版社,1997.117-140.WangXucheng,ShaoMin.Fundamental principles and numerical methods for finite element method(2ndEdition)[M].Beijing:TsinghuaUniversityPress,1997.117-140.(inChinese)
[9]龚晓南.土塑性力学[M].杭州:浙江大学出版社,1990.79-82.GongXiaonan.Plasticity of soil[M].Hangzhou:ZhejiangUniversityPress,1990.79-82.(inChinese)
[10]赵崇斌,张楚汉,张光斗.用无穷元模拟半无限平面弹性地基[J].清华大学学报,1986,26(3):51-64.ZhaoChongbin,ZhangChuhan,ZhangGuangdou.Simulation of semi-infinite plane elastic foundation using infinite elements[J].Journal ofTsinghuaUniersity,1986,26(3):51-64.(inChinese)
[2]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.FanJian,TangJiaxiang.Dynamic characteristics and earthquake response analysis of structures supported on slide-limited friction base isolation system[J].Journal ofBuildingStructures,2001,22(1):20-25.(inChinese)
[3]W E Baker,P A Cox,P S Westine, et al.Explosion hazards and evaluation(Fundamental studies in engineering5)[M].Amsterdam, theNetherlands:ElsevierScientificPublishingCompany,1983.238-243.
[4]P D Smith,G C Mays,T A Rose, et al.Small scale model of complex geometry for blast overpressure assessment[J].InternationalJournal ofImpactEngineering,1992,12(3):345-360.
[5]NaserMostaghel,ToddDavis.Representations ofCoulomb friction for dynamic analysis[J].EarthquakeEngineering andStructuralDynamics,1997,26(5):541-548.
[6]JohnLysmer,RogerL.Kuhlemeyer.Finite dynamic model for infinite media[J].Journal of theEngineeringMechanicsDivision,ASCE,August,1969,95(4):859-877.
[7]沈冯强.改进的阻尼透射边界[J].合肥工业大学学报,1998,21(6):18-21.ShenFengqiang.A modified viscous transmitting boundary[J].Journal ofHefeiUniversity ofTechnology,1998,21(6):18-21.(inChinese)
[8]王勖成,邵敏.有限单元法基本原理和数值方法(第二版)[M].北京:清华大学出版社,1997.117-140.WangXucheng,ShaoMin.Fundamental principles and numerical methods for finite element method(2ndEdition)[M].Beijing:TsinghuaUniversityPress,1997.117-140.(inChinese)
[9]龚晓南.土塑性力学[M].杭州:浙江大学出版社,1990.79-82.GongXiaonan.Plasticity of soil[M].Hangzhou:ZhejiangUniversityPress,1990.79-82.(inChinese)
[10]赵崇斌,张楚汉,张光斗.用无穷元模拟半无限平面弹性地基[J].清华大学学报,1986,26(3):51-64.ZhaoChongbin,ZhangChuhan,ZhangGuangdou.Simulation of semi-infinite plane elastic foundation using infinite elements[J].Journal ofTsinghuaUniersity,1986,26(3):51-64.(inChinese)
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