土-大型地铁地下车站结构动力接触效应研究
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摘要
以苏州地铁一号线的星海站为工程背景,考虑土与地铁车站结构非线性动力相互作用效应,分析了土与地下结构接触面的动力分离与滑移效应、土与地下结构接触面上动土压力和动摩擦力的分布规律与反应幅值,以及动力接触效应对地铁车站结构动力反应的影响规律。研究结果表明:强地震发生时,在地铁地下车站结构侧墙顶端,出现了土与结构接触分离现象,在车站结构顶底板处,土与结构产生了相对滑移现象;考虑动力接触效应时,地下结构总体动力反应是变小的。给出了车站结构侧墙上动土压力分布规律及其动土压力系数,以及车站结构顶底板上的动土压力分布规律及其反应幅值。研究结果对进一步了解土与地下结构的动力接触效应及其对地下结构动力反应的影响,具有一定的参考价值和指导意义。
Based on the engineering background of Xinghai station of metro line 1in Suzhou city,considering the nonlinear dynamic interaction of soil-subway station structure,the following is analyzed mainly in this article:the dynamic separation and slip effect of the interface between soil and underground structure,the response amplitude and the distribution law of dynamic earth pressure and dynamic friction and the influence of dynamic contact effect on the dynamic response of subway station structure.The results show that soil and subway station structure are found separated on the top of the side wall and relatively sliped on the structure roof;meanwhile,the general dynamic response of underground structure is smaller when considering the dynamic contact effect.The distribution law and coefficient of dynamic earth pressure of the side wall are given in this article.The response amplitude and the distribution law of dynamic earth pressure of the structure roof are also given.These analysis results have direct reference value and guiding significance for further understanding the dynamic contact effect of soil-underground structure and its effect on dynamic response.
Based on the engineering background of Xinghai station of metro line 1in Suzhou city,considering the nonlinear dynamic interaction of soil-subway station structure,the following is analyzed mainly in this article:the dynamic separation and slip effect of the interface between soil and underground structure,the response amplitude and the distribution law of dynamic earth pressure and dynamic friction and the influence of dynamic contact effect on the dynamic response of subway station structure.The results show that soil and subway station structure are found separated on the top of the side wall and relatively sliped on the structure roof;meanwhile,the general dynamic response of underground structure is smaller when considering the dynamic contact effect.The distribution law and coefficient of dynamic earth pressure of the side wall are given in this article.The response amplitude and the distribution law of dynamic earth pressure of the structure roof are also given.These analysis results have direct reference value and guiding significance for further understanding the dynamic contact effect of soil-underground structure and its effect on dynamic response.
引文
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[3]刘书.土木工程中动态接触问题的数值计算方法及试验研究[D].北京:清华大学,2000.Liu Sh.Studies on the dynamic contact problem and its numerical methods[D].Beijing:Tsinghua University,2000.
[4]庄海洋,陈国兴.对土体动力粘塑性记忆型嵌套面模型的改进[J].岩土力学,2009,30(1):118-122.Zhuang H Y,Chen G X.Futher analysis on the dynamic viscous-plastic memorial nested yield surface model of soil[J].Rock Mechanics,2009,30(1):118-122.
[5]庄海洋,陈国兴,梁艳仙,等.土体非线性粘弹性模型及其ABAQUS软件的实现[J].岩土力学,2007,28(3):436-442.Zhuang H Y,Chen G X,Liang Y X,et al.A developed elastic-plastic constitutive relation of soil and implemented by ABAQUS software[J].Rock Mechanics,2007,28(3):436-442.
[6]Lee J,Fenves G L.Plastic-damage model for cyclic loading of concrete structures[J].Journal of Engineering Mech-anics,1998,(4):892-900.
[7]Lubliner J,Oliver J,Oller S,et al.A plastic-damage model for concrete[J].International Journal of Solids and Structures,1989,25(3):299-326.
[8]庄海洋,吴祥祖,陈国兴.考虑初始静应力状态的土-地下结构非线性静动力相互作用研究[J].岩石力学与工程学报,2011,30(增1):3112-3119.Zhuang H Y,Wu X Z,Chen G X.Study of nonlinear static and dynamic coupling interaction of soil-underground structure considering initial static stress[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(S1):3112-3119.
[9]楼梦麟,陈清军,等.侧向边界对桩基地震反应影响的研究[R].上海:同济大学,1999.Lou M L,Chen Q J,et al.Study on pile foundation seismic response due to the influence of lateral boundary[R].Shanghai:Tongji University,1999.
[10]楼梦麟,王文剑,朱彤.土-结构体系振动台模型试验中土层边界影响问题[J].地震工程与工程振动,2000,20(2):30-36.Lou M L,Wang W J,Zhu T,et al.Soil lateral boundary effect in shaking fable model test of soilstructure system[J].Journal of Earthquake Engineering and Engineering Vibration,2000,20(2):30-36.
[11]庄海洋.土-地下结构非线性动力相互作用及其大型振动台试验研究[D].南京:南京工业大学,2006.Zhuang H Y.Study on nonlinear dynamic soil-underground structure interaction and its large-size shaking table test[D].Nanjing:Nanjing University of Technology,2006.
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