地下结构对工程场地地震动场的影响
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摘要
本文以日本神户市地铁大开站为工程背景,应用大型通用有限元ANSYS软件,分别建立了自然条件下的工程场地土层和建有地下车站结构的土层的二维有限元分析模型。计算了基岩一致地震动输入模式下2个土层模型的动力反应。通过将2个土层模型的动力反应进行比较分析,讨论了地下结构对工程场地地震动场的影响。分析结果表明,日本神户地铁大开站的存在对其邻近区域土层的地震反应有影响,但影响有限。
Taking a subway station in Kobe city, Japan as the engineering example, we establish 2-dimensional finite element models of soil site in natural condition and with underground structure respectivelly. Then, seismic responses of two models were computed under excitations of uniform seismic wave. At last, by comparing difference between the dynamic responses of two models, influence of the underground structure on ground motion field of the site was discussed. The numerical results show that existence of Daikai subway station has influence on seismic responses of adjacent area of the soil to the underground structure, but such influence is limited.
Taking a subway station in Kobe city, Japan as the engineering example, we establish 2-dimensional finite element models of soil site in natural condition and with underground structure respectivelly. Then, seismic responses of two models were computed under excitations of uniform seismic wave. At last, by comparing difference between the dynamic responses of two models, influence of the underground structure on ground motion field of the site was discussed. The numerical results show that existence of Daikai subway station has influence on seismic responses of adjacent area of the soil to the underground structure, but such influence is limited.
引文
匡志平,刘竹钊,曹国安,2002.地下结构纵向随机地震响应和极值分析.同济大学学报,34(8):922—926.
楼梦麟,潘旦光,范立础,2003.土层地震反应分析中侧向人工边界的影响.同济大学学报,31(7):757—761.
钱七虎,2000.现代城市地下空间开发利用技术及其发展趋势.铁道建筑技术,(5):1—5.
钱七虎,1999.岩土工程的第四次浪潮.地下空间,19(4):267—272.
杨林德,季倩倩,郑永来,2003.软土地铁车站结构的振动台模型试验.现代隧道技术,40(1):7—11.
庄海洋,程绍革,陈国兴,2008.阪神地震中大开地铁车站震害机制数值仿真分析.岩土力学,29(1):245—250.
Jun Seong Choi,Jong She Lee,2002.Nonlinear earthquake response analysis of2-Dunderground structures with soil-structure interaction including separation and sliding at interface.See:15th ASCE Engineering Mechanics Conference.New York:Columbia University.
楼梦麟,潘旦光,范立础,2003.土层地震反应分析中侧向人工边界的影响.同济大学学报,31(7):757—761.
钱七虎,2000.现代城市地下空间开发利用技术及其发展趋势.铁道建筑技术,(5):1—5.
钱七虎,1999.岩土工程的第四次浪潮.地下空间,19(4):267—272.
杨林德,季倩倩,郑永来,2003.软土地铁车站结构的振动台模型试验.现代隧道技术,40(1):7—11.
庄海洋,程绍革,陈国兴,2008.阪神地震中大开地铁车站震害机制数值仿真分析.岩土力学,29(1):245—250.
Jun Seong Choi,Jong She Lee,2002.Nonlinear earthquake response analysis of2-Dunderground structures with soil-structure interaction including separation and sliding at interface.See:15th ASCE Engineering Mechanics Conference.New York:Columbia University.
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