不同地震动输入方向下的大型地下岩体洞室群地震反应分析
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摘要
以某水电站为工程背景,建立该水电站地下厂房大型岩体洞室群有限元-无限元耦合动力计算模型。在洞室群开挖稳定后所形成的二次应力场和地震动荷载联合作用下,进行不同地震动输入方向下的大型岩体洞室群地震反应研究。研究结果表明,地震动斜入射对地下岩体洞室群的动力反应和稳定性有不利的影响,在进行类似的大型地下岩体洞室群地震动安全评价时应考虑地震动输入方向的影响。
The finite-infinite element coupling model of a large underground rock cavern groups is set up which is located in the western of China.Firstly,in order to obtain the reasonable secondary geostress field,the rock cavern is excavated under the loading of gravity.Then its seismic response is studied under the combined loadings of the secondary geostress formed after excavation and the seismic motion considering different incident angles.Simulated results indicate that the obliquely incident earthquake waves dramatically influence the seismic response of underground rock cavern groups,for example,the distribution of stress and the plastic zone of the cavern groups.The incident angle of seismic wave should be taken into account in the seismic safety assessment of the similar underground rock cavern groups.
The finite-infinite element coupling model of a large underground rock cavern groups is set up which is located in the western of China.Firstly,in order to obtain the reasonable secondary geostress field,the rock cavern is excavated under the loading of gravity.Then its seismic response is studied under the combined loadings of the secondary geostress formed after excavation and the seismic motion considering different incident angles.Simulated results indicate that the obliquely incident earthquake waves dramatically influence the seismic response of underground rock cavern groups,for example,the distribution of stress and the plastic zone of the cavern groups.The incident angle of seismic wave should be taken into account in the seismic safety assessment of the similar underground rock cavern groups.
引文
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[14]ABAQUS Inc..ABAQUS/Standard Version6.6.ABAQUS theory manual[M].[S.l.]:ABAQUS Inc.,2006.
[15]林皋.地下结构抗震分析综述(上)[J].世界地震工程,1990,6(2):1-9.(LIN Gao.Summarization of earthquake resistance analysis of underground structures(first)[J].World Earthquake Engineering,1990,6(2):1-9.(in Chinese))
[2]LEE C F.Performance of underground coal mines during the1976Tangshan earthquake[J].Tunnelling and Underground Space Technology,1987,2(2):199-202.
[3]WANG W L,WANG T T,SU J J,et al.Assessment of damage in mountain tunnels due to the Taiwan Chichi earthquake[J].Tunnelling and Underground Space Technology,2001,16(3):133-150.
[4]谢和平,邓建辉,台佳佳,等.汶川大地震灾害与灾区重建的岩土工程问题[J].岩石力学与工程学报,2008,27(9):1757-1766.(XIE Heping,DENG Jianhui,TAI Jiajia,et al.Wenchuan large earthquake and post-earthquake reconsideration-related geotechnical problems[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(9):1757-1766.(in Chinese))
[5]李宏男,肖诗云,霍林生.汶川地震震害调查与启示[J].建筑结构学报,2008,29(4):10-19.(LI Hongnan,XIAO Shiyun,HUO Linsheng.Damage investigation and analysis of engineering structures in the Wenchuan earthquake[J].Journal of Building Structures,2008,29(4):10-19.(in Chinese))
[6]DOWDING C H,ROZEN A.Damage to rock tunnels from earthquake shaking[J].Journal of the Geotechnical Engineering Division,ASCE,1978,104(2):175-191.
[7]李天斌.汶川特大地震中山岭隧道变形破坏特征及影响因素分析[J].工程地质学报,2008,16(6):742-750.(LI Tianbin.Failure characteristics and influence factor analysis of mountain tunnels at epicenter zones of great Wenchuan earthquake[J].Journal of Engineering Geology,2008,16(6):742-750.(in Chinese))
[8]王滔,郭恩栋,张丽娜,等.大跨斜拉桥地震动最不利输入方向分析[J].世界地震工程,2007,23(4):800-804.(WANG Tao,GUO Endong,ZHANG Li′na,et al.The critical direction of earthquake input for dynamic analysis of a long span cable-stayed bridge[J].World Earthquake Engineering,2007,23(4):800-804.(in Chinese))
[9]杨庆山,刘文华,田玉基.国家体育场在多点激励作用下的地震反应分析[J].土木工程学报,2008,41(2):35-41.(YANG Qingshan,LIU Wenhua,TIAN Yuji.Response analysis of national stadium under specially variable earthquake ground motions[J].China Civil Engineering Journal,2008,41(2):35-41.(in Chinese))
[10]林皋,梁青槐.地下结构的抗震设计[J].土木工程学报,1996,29(1):15-24.(LIN Gao,LIANG Qinghuai.A seismic design of underground structures[J].China Civil Engineering Journal,1996,29(1):15-24.(in Chinese))
[11]黄强兵,彭建兵.基于地震波入射角的地下管道地震应力计算[J].地下空间与工程学报,2008,4(5):979-984.(HUANG Qiangbing,PENG Jianbing.Calculation about earthquake stress for underground pipeline based on the incident angle of earthquake wave[J].Chinese Journal of Underground Space and Engineering,2008,4(5):979-984.(in Chinese))
[12]王琴,陈隽,李杰.斜入射地震波作用下地下管线的地震反应分析[J].华中科技大学学报,2008,25(4):283-286.(WANG Qin,CHEN Juan,LI Jie.Seismic response analysis of underground pipeline under obliquely incident seismic waves[J].Journal of Huazhong University of Science and Technology,2008,25(4):283-286.(in Chinese))
[13]杜修力,陈维,李亮,等.斜入射条件下地下结构时域地震反应分析初探[J].震灾防御技术,2007,2(3):290-296.(DU Xiuli,CHEN Wei,LI Liang,et al.Preliminary study of time-domain seismic response for underground structures to obliquely incident seismic waves[J].Technology for Earthquake Disaster Prevention,2007,2(3):290-296.(in Chinese))
[14]ABAQUS Inc..ABAQUS/Standard Version6.6.ABAQUS theory manual[M].[S.l.]:ABAQUS Inc.,2006.
[15]林皋.地下结构抗震分析综述(上)[J].世界地震工程,1990,6(2):1-9.(LIN Gao.Summarization of earthquake resistance analysis of underground structures(first)[J].World Earthquake Engineering,1990,6(2):1-9.(in Chinese))
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