“5·12”汶川地震紫坪铺面板堆石坝静动力初步反演研究
|
摘要
根据"5·12"汶川地震峰值加速度衰减关系,推求坝址基岩EW、NS、UD方向峰值加速度分别为0.52g、0.46g、0.43g,然后采用比例法将实测加速度记录(051MXT)换算得到紫坪铺大坝动力计算的输入加速度时程;在利用建设阶段变形监测资料反演堆石体静力模型参数得到大坝静应力的基础上,结合吉林台、猴子岩等工程室内试验资料类比得到了堆石体反映振动硬化特性动力模型的初步参数,并结合关门山、察汗乌苏等工程的现场原位试验资料和大坝实测地震加速度的频谱特性进行了调整复核;通过计算输入地震加速度的等效振动周数,利用实测资料对大坝堆石体的永久变形参数进行了反演分析。结论认为:振动硬化动力模型反映了大坝堆石体地震过程中的"震缩"现象,"5·12"汶川地震主震时间较长和坝址近震的铅直向加速度较大,是紫坪铺大坝震后永久变形较大的主要原因,Ⅱ、Ⅲ期混凝土面板的错台由于堆石体永久变形引起的次生破坏。现有土石坝动力分析理论和方法基本可以反映土石坝的抗震性能。
Based on the"5·12"Wenchuan Earthquake peak acceleration attenuation relations,the peak acceleration of the decided dam bedrock ground on the EW,NS,UD directions were 0.52g,0.46g,and 0.43g,respectively,and the measured acceleration records(051MXT) were converted to the input acceleration time history of Zipingpu Dam by using the ratio method.Based on rockfill E-B model parameters inversion by the construction phase deformation monitoring data and Jilintai,Houziyan and other projects laboratory test data,the initial parameters of dynamic models with vibration hardening characteristics were gained,which were adjusted to theGuanmenshan,Chahanwusu-situ testing data and the dam measured spectral characteristics of the earthquake acceleration.By calculating effective vibration times to the input earthquake acceleration and using the measured data,the rockfill permanent deformation parameters were decided by the inversion analysis.It was concluded that the vibration hardening dynamic model reflects the rockfill material'shock shrinkage'phenomenon during an earthquake.The main reason of the larger Zipingpu dam permanent deformation during "5 ·12" Wenchuan earthquake are both the longer main shock time and the near earthquake.The shear failure of concrete slab between Ⅱ and Ⅲ stage is secondary damage caused by rockfill permanent deformation.Existing dynamic analysis theories and methods of embankment dam can basically reflect earth rock dam seismic characteristics.
Based on the"5·12"Wenchuan Earthquake peak acceleration attenuation relations,the peak acceleration of the decided dam bedrock ground on the EW,NS,UD directions were 0.52g,0.46g,and 0.43g,respectively,and the measured acceleration records(051MXT) were converted to the input acceleration time history of Zipingpu Dam by using the ratio method.Based on rockfill E-B model parameters inversion by the construction phase deformation monitoring data and Jilintai,Houziyan and other projects laboratory test data,the initial parameters of dynamic models with vibration hardening characteristics were gained,which were adjusted to theGuanmenshan,Chahanwusu-situ testing data and the dam measured spectral characteristics of the earthquake acceleration.By calculating effective vibration times to the input earthquake acceleration and using the measured data,the rockfill permanent deformation parameters were decided by the inversion analysis.It was concluded that the vibration hardening dynamic model reflects the rockfill material'shock shrinkage'phenomenon during an earthquake.The main reason of the larger Zipingpu dam permanent deformation during "5 ·12" Wenchuan earthquake are both the longer main shock time and the near earthquake.The shear failure of concrete slab between Ⅱ and Ⅲ stage is secondary damage caused by rockfill permanent deformation.Existing dynamic analysis theories and methods of embankment dam can basically reflect earth rock dam seismic characteristics.
引文
[1]Seed H B.Considerations in the earthquake-resistant design of earth and rockfill dams[J].Geotechnique,1979,29(3):215-263.
[2]Guan Z C.Investigation of the“5.12”Wenchuan Earthquake damages to the Zipingpu Water Control Project and an assessment of its safety state[J].Science in China Series E-technological Sciences,2009(4):820-834.
[3]Wieland M.The effects of the May 12,2008 Wenchuan Earthquake on large storage dams[J].Wasserwirtschaft,2009,99(9):10-15.
[4]Yang Zeyan,Zhang Jianmin,Gao Xizhang.A primary analysis of seismic behavior and damage for Zipingpu CFRD during Wenchuan Earthquake water power[J].Water Power,2009,35(7):30-33.[杨泽艳,张建民,高希章.汶川地震中紫坪铺面板坝抗震特性初步分析[J].水力发电,2009,35(7):30-33.]
[5]Chen S S,Huo J P,Zhang W M.Analysis of effects of“5.12”Wenchuan Earthquake on Zipingpu Concrete Face Rockfill Dam[J].Chinese Journal of Geotechnical Engineering,2008(06):795-801.[陈生水,霍家平,章为民.“5.12”汶川地震对紫坪铺混凝土面板坝的影响及原因分析[J].岩土工程学报,2008(06):795-801.]
[6]Chen Houaun,Xu Zeping,Li Min.Wenchuan Earthquake and seismic safety of large dams[J].Journal of Hydraulic Engineering,2008,33(10):1160-1161.[陈厚群,徐泽平,李敏.汶川大地震和大坝抗震安全[J].水利学报,2008,33(10):1160-1161.]
[7]Zhu Sheng,Wang Yongming,Hu Xiangqun.Application research on immune genetic algorithm in back analysis of rockfill dam’s coarse grain material constitutive model parameters[J].Rock and Soil Mechanics,2010,31(3):961-966.[朱晟,王永明,胡祥群.免疫遗传算法在土石坝筑坝粗粒料本构模型参数反演中的应用研究[J].岩土力学,2010,31(3):961-966.]
[8]Song Yanggang,Deng Liangsheng,Cai Dewen,et al.Monitoring for concrete faced rockfill dam settiement during construction of Zipingpu Project[J].Sichuan Water Power,2006,25(01):21-27.[宋彦刚,邓良胜,蔡德文,等.紫坪铺混凝土面板堆石坝施工期沉降监测分析[J].四川水力发电,2006,25(01):21-27.]
[9]Wang W M,Zhao L F,Li J,et al.Rupture process of the Ms8.0 wenchuan earthquake of Sichuan,China[J].Journal of Geophysics Chinese Edition,2008.51(5):1403-1410.
[10]Liu Q F,Li X J.Preliminary analysis of the hanging wall effect and velocity pulse of the“5.12”Wenchuan earthquake[J].Earthquake Engineering and Engineering Vibration,2009,8(02):165-177.
[11]Yu Haiying,Wang Dong,Yang Yongqiang,et al.The preliminary analysis of strong ground motion records from the Ms8.0 Wenchuan Earthquake[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(1):1-13.[于海英,王栋,杨永强,等.汶川8.0级地震强震动加速度记录的初步分析[J].地震工程与工程振动,2009,29(1):1-13.]
[12]Kiureghian A D,Neuenhofer A.Response spectrum method for multi-support seismic excitations[J].Earthquake Engineering&Structural Dynamics,1992,21(8):713-740.
[13]Zhu Sheng,Zhou Jianbo.Deformation behaviour of coarse grained materials under cyclic loading[J].Rock and Soil Mechanics,2010(5):1375-1380.[朱晟,周建波.粗粒筑坝材料的动力变形特性[J].岩土力学,2010(5):1375-1380.]
[14]Abdel-Ghaffar A M,Scott R F,Experimental investigation of the dynamic response characteristics of an earth dam[C]//Proc 2nd US National Conference in Earthquake Engi-neering.California,1979:1026-1035.
[15]Nose M.Results of earthquake observations and dynamic test on rockfill dams and their consideration[C]//Proc12th ICOLD.Mexico,1976:919-934.
[16]Han Guocheng,Kong Xianjing,Wang Bingqiang,et al,Experimental study of elastic wave in guanmengshan concrete faced rockfill dam field[J].Journal of Dalian University of Technology,1990,30(05):559-568.[韩国城,孔宪京,王炳乾,等.关门山面板堆石坝现场弹性波试验研究[J].大连理工大学学报,1990,30(05):559-568.]
[17]Lee K L,Seed H B.Cyclic stress conditions causing liquefaction of sand[J].Journal of the Soil Mechanics and Foundations Division,ASCE,1967,93(SM1):47-70.
[2]Guan Z C.Investigation of the“5.12”Wenchuan Earthquake damages to the Zipingpu Water Control Project and an assessment of its safety state[J].Science in China Series E-technological Sciences,2009(4):820-834.
[3]Wieland M.The effects of the May 12,2008 Wenchuan Earthquake on large storage dams[J].Wasserwirtschaft,2009,99(9):10-15.
[4]Yang Zeyan,Zhang Jianmin,Gao Xizhang.A primary analysis of seismic behavior and damage for Zipingpu CFRD during Wenchuan Earthquake water power[J].Water Power,2009,35(7):30-33.[杨泽艳,张建民,高希章.汶川地震中紫坪铺面板坝抗震特性初步分析[J].水力发电,2009,35(7):30-33.]
[5]Chen S S,Huo J P,Zhang W M.Analysis of effects of“5.12”Wenchuan Earthquake on Zipingpu Concrete Face Rockfill Dam[J].Chinese Journal of Geotechnical Engineering,2008(06):795-801.[陈生水,霍家平,章为民.“5.12”汶川地震对紫坪铺混凝土面板坝的影响及原因分析[J].岩土工程学报,2008(06):795-801.]
[6]Chen Houaun,Xu Zeping,Li Min.Wenchuan Earthquake and seismic safety of large dams[J].Journal of Hydraulic Engineering,2008,33(10):1160-1161.[陈厚群,徐泽平,李敏.汶川大地震和大坝抗震安全[J].水利学报,2008,33(10):1160-1161.]
[7]Zhu Sheng,Wang Yongming,Hu Xiangqun.Application research on immune genetic algorithm in back analysis of rockfill dam’s coarse grain material constitutive model parameters[J].Rock and Soil Mechanics,2010,31(3):961-966.[朱晟,王永明,胡祥群.免疫遗传算法在土石坝筑坝粗粒料本构模型参数反演中的应用研究[J].岩土力学,2010,31(3):961-966.]
[8]Song Yanggang,Deng Liangsheng,Cai Dewen,et al.Monitoring for concrete faced rockfill dam settiement during construction of Zipingpu Project[J].Sichuan Water Power,2006,25(01):21-27.[宋彦刚,邓良胜,蔡德文,等.紫坪铺混凝土面板堆石坝施工期沉降监测分析[J].四川水力发电,2006,25(01):21-27.]
[9]Wang W M,Zhao L F,Li J,et al.Rupture process of the Ms8.0 wenchuan earthquake of Sichuan,China[J].Journal of Geophysics Chinese Edition,2008.51(5):1403-1410.
[10]Liu Q F,Li X J.Preliminary analysis of the hanging wall effect and velocity pulse of the“5.12”Wenchuan earthquake[J].Earthquake Engineering and Engineering Vibration,2009,8(02):165-177.
[11]Yu Haiying,Wang Dong,Yang Yongqiang,et al.The preliminary analysis of strong ground motion records from the Ms8.0 Wenchuan Earthquake[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(1):1-13.[于海英,王栋,杨永强,等.汶川8.0级地震强震动加速度记录的初步分析[J].地震工程与工程振动,2009,29(1):1-13.]
[12]Kiureghian A D,Neuenhofer A.Response spectrum method for multi-support seismic excitations[J].Earthquake Engineering&Structural Dynamics,1992,21(8):713-740.
[13]Zhu Sheng,Zhou Jianbo.Deformation behaviour of coarse grained materials under cyclic loading[J].Rock and Soil Mechanics,2010(5):1375-1380.[朱晟,周建波.粗粒筑坝材料的动力变形特性[J].岩土力学,2010(5):1375-1380.]
[14]Abdel-Ghaffar A M,Scott R F,Experimental investigation of the dynamic response characteristics of an earth dam[C]//Proc 2nd US National Conference in Earthquake Engi-neering.California,1979:1026-1035.
[15]Nose M.Results of earthquake observations and dynamic test on rockfill dams and their consideration[C]//Proc12th ICOLD.Mexico,1976:919-934.
[16]Han Guocheng,Kong Xianjing,Wang Bingqiang,et al,Experimental study of elastic wave in guanmengshan concrete faced rockfill dam field[J].Journal of Dalian University of Technology,1990,30(05):559-568.[韩国城,孔宪京,王炳乾,等.关门山面板堆石坝现场弹性波试验研究[J].大连理工大学学报,1990,30(05):559-568.]
[17]Lee K L,Seed H B.Cyclic stress conditions causing liquefaction of sand[J].Journal of the Soil Mechanics and Foundations Division,ASCE,1967,93(SM1):47-70.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心