基于拱冠位移的拱坝地震易损性
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摘要
选取一系列地震波对同时考虑材料非线性和横缝非连续接触的拱坝进行大量的动力时程分析,以拱冠最大位移为响应参数定义3个性能水准,结合通过结构反应回归分析得到的概率地震需求模型,建立在地震作用下基于拱冠位移的拱坝易损性曲线,比较不同地震动参数表示下概率地震需求模型以及易损性曲线的区别.利用易损性曲线计算拱坝在不同大小地震作用下处于各级性能水准的概率,为基于性能的拱坝抗震安全评价提供了理论依据.
Eighteen realistic earthquake records were selected and scaled as the seismic input for a series of dynamic response-history analyses for a high arch dam considering both nonlinearity of material and discontinuous contact of contraction joints in the dam.The dynamic responses of the arch dam under earthquake were assessed to define three performance levels based on the maximum crest deformation.The probabilistic seismic demand models and seismic fragility curves of the arch dam were generated conditioned upon different seismic intensity measures of which the differences were also discussed.The probability of exceeding performance levels for arch dams under various levels of earthquake was calculated,which provides theoretical basis for performance-based seismic safety evaluation of arch dams.
Eighteen realistic earthquake records were selected and scaled as the seismic input for a series of dynamic response-history analyses for a high arch dam considering both nonlinearity of material and discontinuous contact of contraction joints in the dam.The dynamic responses of the arch dam under earthquake were assessed to define three performance levels based on the maximum crest deformation.The probabilistic seismic demand models and seismic fragility curves of the arch dam were generated conditioned upon different seismic intensity measures of which the differences were also discussed.The probability of exceeding performance levels for arch dams under various levels of earthquake was calculated,which provides theoretical basis for performance-based seismic safety evaluation of arch dams.
引文
[1]陈厚群.混凝土高坝抗震研究[M].1版.北京:高等教育出版社,2011.
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[9]钟红,李晓燕,林皋.基于破坏形态的重力坝地震易损性研究[J].大连理工大学学报,2012,52(1):60-65.ZHONG Hong,LI Xiao-yan,LIN Gao.Analyses of failure modes-based seismic fragility of gravity dams[J].Journal of Dalian University of Technology,2012,52(1):60-65.
[10]GHANAAT Y,HASHIMOTO P S,ZUCHUAT O,et al.Seismic fragility of Muhleberg dam using nonlinear analysis with latin hypercube simulation[C]∥Proceedings of 31st Annual USSD Conference.San Diego:[s.n.],2011.
[11]PAPADRAKAKIS M,PAPADOPOULOS V,LAGAROS N D,et al.Vulnerability analysis of large concrete dams using the continuum strong discontinuity approach and neural networks[J].Structural Safety,2008,30(3):217-235.
[12]陈厚群.混凝土高坝强震震例分析和启迪[J].水利学报,2009,40(1):10-18.CHEN Hou-qun.Analysis on damages of high concrete dams subjected to strong earthquake and lessons for learning[J].SHUILI XUEBAO,2009,40(1):10-18.
[13]YAO X,JIANG J,XU Y.Damage analysis of high arch dam including contraction joint and cracking nonlinearity[C]∥Proceedings of Joint Conference of7CUEE&5ICEE.Tokyo,Japan:[s.n.],2010.
[14]SHOME N,CORNELL C A,BAZZURRO P,et al.Earthquakes,records,and nonlinear responses[J].Earthquake Spectra,1998,14(3):469-500.
[15]陈健云,郑毅.强震下拱坝损伤整体判别指标的初步探讨[J].水利学报,2010,41(7):826-832.CHEN Jian-yun,ZHENG Yi.Preliminary study on damage index of arch dam subjected to high intensity seismic excitations[J].SHUILI XUEBAO,2010,41(7):826-832.
[16]CORNELL C A,JALAYER F,HAMBURGER R O,et al.Probabilistic basis for 2000SAC federal emergency management agency steel moment frame guidelines[J].Journal of Structural Engineering,2002,128(4):526-533.
[2]FRANZINI J,MCCANN M,SHAH H.Application of probabilistic risk analysis to the safety of dams[C]∥Proceedings of 8th World Conference on Earthquake Engineering.San Francisco:[s.n.],1984.
[3]VARBANOV G,KOSTOV M,STEFANOV D,et al.Seismic risk assessment for large dams[C]∥Proceedings of 8th Pacific Conference on Earthquake Engineering.Singapore:[s.n.],2007.
[4]沈怀至,金峰,张楚汉.基于功能的混凝土重力坝抗震风险模型研究[J].岩土力学,2008,29(12):3323-3328.SHEN Huai-zhi,JIN Feng,ZHANG Chu-han.Performance-based aseismic risk analysis model of concrete gravity dams[J].Rock and Soil Mechanics,2008,29(12):3323-3328.
[5]HWANG H,JERNIGAN J B,LIN Y W.Evaluation of seismic damage to Memphis bridges and highway systems[J].Journal of Bridge Engineering,2000,5(4):322-330.
[6]NIELSON B G,DESROCHES R.Seismic fragility methodology for highway bridges using a component level approach[J].Earthquake Engineering and Structural Dynamics,2007,36(6):823-839.
[7]TEKIE P B,ELLINGWOOD B R.Seismic fragility assessment of concrete gravity dams[J].Earthquake Engineering and Structural Dynamics,2003,32(14):2221-2240.
[8]沈怀至,金峰,张楚汉.基于性能的重力坝-地基系统地震易损性分析[J].工程力学,2008,25(12):86-91.SHEN Huai-zhi,JIN Feng,ZHANG Chu-han.Performance-based seismic fragility analysis of concrete gravityfoundation system[J].Engineering Mechanics,2008,25(12):86-91.
[9]钟红,李晓燕,林皋.基于破坏形态的重力坝地震易损性研究[J].大连理工大学学报,2012,52(1):60-65.ZHONG Hong,LI Xiao-yan,LIN Gao.Analyses of failure modes-based seismic fragility of gravity dams[J].Journal of Dalian University of Technology,2012,52(1):60-65.
[10]GHANAAT Y,HASHIMOTO P S,ZUCHUAT O,et al.Seismic fragility of Muhleberg dam using nonlinear analysis with latin hypercube simulation[C]∥Proceedings of 31st Annual USSD Conference.San Diego:[s.n.],2011.
[11]PAPADRAKAKIS M,PAPADOPOULOS V,LAGAROS N D,et al.Vulnerability analysis of large concrete dams using the continuum strong discontinuity approach and neural networks[J].Structural Safety,2008,30(3):217-235.
[12]陈厚群.混凝土高坝强震震例分析和启迪[J].水利学报,2009,40(1):10-18.CHEN Hou-qun.Analysis on damages of high concrete dams subjected to strong earthquake and lessons for learning[J].SHUILI XUEBAO,2009,40(1):10-18.
[13]YAO X,JIANG J,XU Y.Damage analysis of high arch dam including contraction joint and cracking nonlinearity[C]∥Proceedings of Joint Conference of7CUEE&5ICEE.Tokyo,Japan:[s.n.],2010.
[14]SHOME N,CORNELL C A,BAZZURRO P,et al.Earthquakes,records,and nonlinear responses[J].Earthquake Spectra,1998,14(3):469-500.
[15]陈健云,郑毅.强震下拱坝损伤整体判别指标的初步探讨[J].水利学报,2010,41(7):826-832.CHEN Jian-yun,ZHENG Yi.Preliminary study on damage index of arch dam subjected to high intensity seismic excitations[J].SHUILI XUEBAO,2010,41(7):826-832.
[16]CORNELL C A,JALAYER F,HAMBURGER R O,et al.Probabilistic basis for 2000SAC federal emergency management agency steel moment frame guidelines[J].Journal of Structural Engineering,2002,128(4):526-533.
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