基于三维地质模型的地下洞室群地震动力响应分析
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摘要
工程区域地质条件是影响地下洞室群稳定的重要因素,而通用数值分析软件在建立复杂地质模型时存在建模时间长、准确度低、不能真实反映复杂地质特征等困难。针对此问题,采用以非均匀有理B样条(NURBS)为主的混合数据结构,对复杂区域地质构造进行了三维建模,建立了西南某水电站大型地下洞室群的三维地质模型。并以此模型为基础,建立了包括空间曲面断层、地层等复杂地质因素的数值模型,结合ABAQUS的隐式和显式分析,对洞室开挖和地震作用下的动力时程响应进行了仿真分析。分析结果表明,该方法不仅较大程度地反映了实际地质情况,而且有利于数值仿真分析的网格剖分与计算,从而为分析地下洞室群地震反应提供了三维数值模型,为地震作用下洞室的安全性评价提供了重要的技术支持。
Engineering regional geologic condition is an important factor that affects the stabilization of underground cavern group,while the common numerical analysis soft wares have some disadvantages such as the long time consumption for modeling,low accuracy and the difficulty in reflecting the real complex geological features.Aiming at these problems,a mixed data structure,in which nonuniform rational B-spline(NURBS) is predominated,is used to carry out the 3D detailed modeling of the complex regional geological structure;and the whole 3D refined geological model of a large underground cavern group in Southwest China is established by this method.Based on this geological model,a numerical model including complex geological factors such as the space surface faults,formations have also been built;and combine the implicit and explicit module of ABAQUS,the underground cavern group excavation and dynamic response under seismic load have been simulated.The results indicate that: This approach not only reflects the actual geological condition to the greatest degree,but also makes against the mesh generation and numerical calculation;thus it provides an accurate and practical model for the dynamic response analysis of underground cavern group and important technical support for the seismic safety evaluation of underground cavern group.
Engineering regional geologic condition is an important factor that affects the stabilization of underground cavern group,while the common numerical analysis soft wares have some disadvantages such as the long time consumption for modeling,low accuracy and the difficulty in reflecting the real complex geological features.Aiming at these problems,a mixed data structure,in which nonuniform rational B-spline(NURBS) is predominated,is used to carry out the 3D detailed modeling of the complex regional geological structure;and the whole 3D refined geological model of a large underground cavern group in Southwest China is established by this method.Based on this geological model,a numerical model including complex geological factors such as the space surface faults,formations have also been built;and combine the implicit and explicit module of ABAQUS,the underground cavern group excavation and dynamic response under seismic load have been simulated.The results indicate that: This approach not only reflects the actual geological condition to the greatest degree,but also makes against the mesh generation and numerical calculation;thus it provides an accurate and practical model for the dynamic response analysis of underground cavern group and important technical support for the seismic safety evaluation of underground cavern group.
引文
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[13]李琦.基于ABAQUS软件的地下洞室群抗震分析研究[D].南京:河海大学,2008.
[14]克拉夫,彭津.结构动力学[M].王光远等译.北京:科学出版社,1984.
[15]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):1877-1882.SUI Bin,ZHU Wei-shen,LI Xiao-jing.Simulation ondynamic response of large underground opening complexunder seismic loads[J].Chinese Journal of GeotechnicalEngineering,2008,30(12):1877-1882.
[16]华东水利学院土力学教研室.土工原理与计算[M].北京:水利水电出版社,1984.
[17]廖振鹏.工程波动理论导论(第二版)[M].北京:科学出版社,2002.
[18]解振涛.层状场域内上、下部结构动力相互作用的输入地震动问题研究[D].西安:西安理工大学,2008.
[19]王如宾,徐卫亚,石崇,等.高地震烈度区岩体地下洞室动力响应分析[J].岩石力学与工程学报,2009,28(3):568-575.WANG Ru-bin,XU Wei-ya,SHI Chong,et al.Dynamicresponse analysis of rock underground caverns in highlyseismic region[J].Chinese Journal of Rock Mechanicsand Engineering,2009,28(3):568-575.
[20]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):1873-1882.LI Hai-bo,LIU Bo,LüTao,et al.A simple safetyassessment method for underground engineering in rockunder seismic loading[J].Rock and Soil Mechanics,2009,30(7):1873-1882.
[2]McClure,COLE R.Damage to underground structuresduring earthquakes[C]//Workshop on Seismic Performanceof Underground Facilities.Augusta Ga USA:E.I.du Pontde Nemours&Co.E.I.du Pont de Nemours&Co,1981:75-106.
[3]陈健云,胡志强,林皋.超大型地下洞室群的三维地震响应分析[J].岩土工程学报,2001,23(4):494-498.CHEN Jian-yun,HU Zhi-qiang,LIN Gao.3-D seismicresponse study of large scale underground groupcaverns[J].Chinese Journal of GeotechnicalEngineering,2001,23(4):494-498.
[4]马行东,李海波.地震波入射方向对地下岩体洞室动态响应的初步分析[J].水力发电,2007,33(1):23-25.MA Xing-dong,LI Hai-bo.Primary analysis of differentincidence propagation on dynamic response ofunderground rock cavern under earthquake[J].WaterPower,2007,33(1):23-25.
[5]吕涛,李海波,杨建宏,等.溪洛渡地下洞室群地震响应的二维及三维数值模型比较分析研究[J].岩土力学,2009,30(3):721-728.LüTao,LI Hai-bo,YANG Jian-hong,et al.Comparisonbetween 2D and 3D numerical analysis for seismicresponse of Xiluodu underground caverns[J].Rock andSoil Mechanics,2009,30(3):721-728.
[6]吕涛.地震作用下岩体地下洞室响应及安全评价方法研究[D].武汉:中国科学院武汉岩土力学研究所,2008.
[7]左双英,肖明.映秀湾水电站大型地下洞室群三维非线性损伤地震响应数值分析[J].水力发电学报,2009,28(5):127-133.ZUO Shuang-ying,XIAO Ming.3D numerical analysis ofnonlinear damage seismic response of large undergroundcaverns of Yingxiuwan hydropower station[J].Journal ofHydroelectric Engineering,2009,28(5):127-133.
[8]袁松.地震动力响应下公路隧道合理净距的研究[D].成都:西南交通大学,2008.
[9]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.LI Xiao-jun,LU Tao.Explicit finite element analysis ofearthquake response for underground caverns ofhydropower stations[J].Journal of HydroelectricEngineering,2009,28(5):41-46.
[10]钟登华,李明超,刘杰.水利水电工程地质三维统一建模方法研究[J].中国科学E辑(技术科学),2007,37(3):455-466.
[11]钟登华,李明超,杨建敏.复杂工程岩体结构三维可视化构造及其应用[J].岩石力学与工程学报,2005,24(4):575-580.ZHONG Deng-hua,LI Ming-chao,YANG Jian-min.3Dvisual construction of complex engineering rock massstructure and its application[J].Chinese Journal of RockMechanics and Engineering,2005,24(4):575-580.
[12]姜忻良,徐余,郑刚.地下隧道-土体系地震反应分析的有限元与无限元耦合法[J].地震工程与工程振动,1999,(3):22-26.JIANG Xin-liang,XU Yu,ZHENG Gang.Finite elementand infinite element coupling method for seismic analysisof soil-underground tunnel system[J].EarthquakeEngineering and Engineering Vibration,1999,(3):22-26.
[13]李琦.基于ABAQUS软件的地下洞室群抗震分析研究[D].南京:河海大学,2008.
[14]克拉夫,彭津.结构动力学[M].王光远等译.北京:科学出版社,1984.
[15]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):1877-1882.SUI Bin,ZHU Wei-shen,LI Xiao-jing.Simulation ondynamic response of large underground opening complexunder seismic loads[J].Chinese Journal of GeotechnicalEngineering,2008,30(12):1877-1882.
[16]华东水利学院土力学教研室.土工原理与计算[M].北京:水利水电出版社,1984.
[17]廖振鹏.工程波动理论导论(第二版)[M].北京:科学出版社,2002.
[18]解振涛.层状场域内上、下部结构动力相互作用的输入地震动问题研究[D].西安:西安理工大学,2008.
[19]王如宾,徐卫亚,石崇,等.高地震烈度区岩体地下洞室动力响应分析[J].岩石力学与工程学报,2009,28(3):568-575.WANG Ru-bin,XU Wei-ya,SHI Chong,et al.Dynamicresponse analysis of rock underground caverns in highlyseismic region[J].Chinese Journal of Rock Mechanicsand Engineering,2009,28(3):568-575.
[20]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):1873-1882.LI Hai-bo,LIU Bo,LüTao,et al.A simple safetyassessment method for underground engineering in rockunder seismic loading[J].Rock and Soil Mechanics,2009,30(7):1873-1882.
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