基于两类典型动力人工边界的水电站地下洞室群地震反应分析
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摘要
通过自编子程序实现粘弹性边界及二阶透射边界的施加及相应的地震动输入,并内置于大型通用有限元分析软件系统中,采用隐式积分算法进行动力分析,以实现无条件稳定的地震反应时域分析。算例精度和准确度验证了该程序的有效性,将其应用于大型地下厂房洞室群的地震反应计算,给出了洞室不同位置的应力、位移和加速度的幅值分布及时程变化曲线,为深入了解地震作用下洞室群的动力反应特点提供了参考。
Using implicit integration scheme to analyze the dynamic properties,the codes for applying the multi-order transmission boundary and viscoelasticity boundary with the corresponding seismic input are programmed and embedded into the general finite element analysis software system to realize unconditional stable time domain analysis of seismic response.A numerical example is presented to verify the precision and reliability of the proposed method.Finally,the seismic response calculation of the large-scale underground powerhouse chambers of hydropower station is taken as an example.Variation curves of powerhouse and amplitudes distribution of stress,displacement and acceleration in different position of chambers are presented,which gives reference to gain the dynamic characteristics of underground chambers with the seismic action.
Using implicit integration scheme to analyze the dynamic properties,the codes for applying the multi-order transmission boundary and viscoelasticity boundary with the corresponding seismic input are programmed and embedded into the general finite element analysis software system to realize unconditional stable time domain analysis of seismic response.A numerical example is presented to verify the precision and reliability of the proposed method.Finally,the seismic response calculation of the large-scale underground powerhouse chambers of hydropower station is taken as an example.Variation curves of powerhouse and amplitudes distribution of stress,displacement and acceleration in different position of chambers are presented,which gives reference to gain the dynamic characteristics of underground chambers with the seismic action.
引文
[1]陶连金,张倬元,傅小敏.在地震载荷作用下的节理岩体地下洞室围岩稳定性分析[J].中国地质灾害与防治学报,1998,19(1):32-40.
[2]金峰,王光纶,贾伟伟.离散元—边界元动力耦合模型在地下结构动力分析中的应用[J].水利学报,2001,1(2):24-28.
[3]陈健云,胡志强,林皋.超大型地下洞室群的随机地震响应分析[J].水利学报,2002(1):71-75.
[4]隋斌,朱维申,李晓静.地震荷载作用下大型地下洞室群的动态响应模拟[J].岩土工程学报,2008,30(12):1 877-1 882.
[5]李海波,刘博,吕涛,等.一种简单的岩体地下洞室地震安全评价方法[J].岩土力学,2009,30(7):1 873-1 882.
[6]廖振鹏.工程波动理论导论(第二版)[M].北京:科学出版社,2002.
[7]杜修力,赵密,王进廷.近场波动模拟的人工应力边界条件[J].力学学报,2006,38(1):49-56.
[8]杜修力,赵密.基于黏弹性边界的拱坝地震反应分析方法[J].水利学报,2006,37(9):1 063-1 069.
[9]廖振鹏.工程波动理论导论(第二版)[M].北京:科学出版社,2002.
[10]李小军,卢滔.水电站地下厂房洞室群地震反应显式有限元分析[J].水力发电学报,2009,28(5):41-46.
[2]金峰,王光纶,贾伟伟.离散元—边界元动力耦合模型在地下结构动力分析中的应用[J].水利学报,2001,1(2):24-28.
[3]陈健云,胡志强,林皋.超大型地下洞室群的随机地震响应分析[J].水利学报,2002(1):71-75.
[4]隋斌,朱维申,李晓静.地震荷载作用下大型地下洞室群的动态响应模拟[J].岩土工程学报,2008,30(12):1 877-1 882.
[5]李海波,刘博,吕涛,等.一种简单的岩体地下洞室地震安全评价方法[J].岩土力学,2009,30(7):1 873-1 882.
[6]廖振鹏.工程波动理论导论(第二版)[M].北京:科学出版社,2002.
[7]杜修力,赵密,王进廷.近场波动模拟的人工应力边界条件[J].力学学报,2006,38(1):49-56.
[8]杜修力,赵密.基于黏弹性边界的拱坝地震反应分析方法[J].水利学报,2006,37(9):1 063-1 069.
[9]廖振鹏.工程波动理论导论(第二版)[M].北京:科学出版社,2002.
[10]李小军,卢滔.水电站地下厂房洞室群地震反应显式有限元分析[J].水力发电学报,2009,28(5):41-46.
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