考虑前期震动影响的紫坪铺面板坝震后抗震安全评价
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摘要
围绕经受了"5.12"汶川大地震的紫坪铺大坝的震后加固,根据地震后最新核定的地震动参数,采用三维真非线性动力反应分析方法,进行了紫坪铺大坝震后抗震安全评价。紫坪铺大坝是经历了汶川大地震强震的,在进行震后的抗震计算和抗震安全性评价时,应当考虑前期震动的影响。采用试验研究和计算分析,研究了前期震动对大坝地震反应的影响,进行了设计地震下的大坝动力分析,从稳定、变形、面板防渗体系安全等多角度,对震后大坝的抗震安全性进行了评价,分析了抗震薄弱环节,对抗震加固措施提出了建议。所提出的抗震安全性评价方法以及有关规律和结论,可为工程设计和建设提供技术依据。
The post-earthquake seismic safety of Zipingpu dam that suffered from 5.12 Wenchuan earthquake,is evaluated by using a 3D authentic nonlinear dynamic analysis and the latest approved parameters of earthquake ground motion.In the evaluation,the effect of pre-vibration caused by this earthquake of great intensity is considered.Both experimental cyclic triaxial test and numerical analysis are used for a dynamic analysis of the dam under design earthquake.The post-earthquake evaluation is a comprehensive study on stability,deformation and safety of face slab impervious system,etc.,and seismic weak points are revealed.This work provides references for design of CFRD.
The post-earthquake seismic safety of Zipingpu dam that suffered from 5.12 Wenchuan earthquake,is evaluated by using a 3D authentic nonlinear dynamic analysis and the latest approved parameters of earthquake ground motion.In the evaluation,the effect of pre-vibration caused by this earthquake of great intensity is considered.Both experimental cyclic triaxial test and numerical analysis are used for a dynamic analysis of the dam under design earthquake.The post-earthquake evaluation is a comprehensive study on stability,deformation and safety of face slab impervious system,etc.,and seismic weak points are revealed.This work provides references for design of CFRD.
引文
[1]关志诚,宋彦刚,蔡德文.紫坪铺高面板坝“5.12”震害调查与安全状态评价[J].水利水电技术,2008,30(9):36～40.GUAN Zhicheng,SONG Yangang,CAI De-wen.Safety assessment and investigation on damage from disaster of“5.12”WenchuanEarthquake for Zipingpu Concrete Faced Rockfill Dam[J].Water Conservancy and Hydropower Engineering,2008,30(9):36～40.(in Chinese)
[2]陈生水,霍家平,章为民.“5.12”汶川地震对紫坪铺混凝土面板堆石坝的影响及原因分析[J].岩土工程学报,2008,30(6):795～801.CHEN Shengshui,HUO Jiaping,ZHANG Weimin.Analysis of effect of“5.12”Wenchuan Earthquake on Zipingpu CFRD[J].Chinese Journal of Geotechnical Engineering,2008,30(6):795～801.(in Chinese)
[3]赵剑明,刘小生,温彦锋,等.紫坪铺大坝汶川地震震害分析及高土石坝抗震减灾研究设想[J].水力发电,2009,35(5):11～14.ZHAO Jianming,LIU Xiaosheng,WEN Yanfeng,et al.Earthquake damages of Zipingpu CFRD in Wenchuan Earthquake and studyproposal on seismic fortification of high rock-fill dam[J].Water Power,2009,35(5):11～14.(in Chinese)
[4]赵剑明,汪闻韶,常亚屏,等.高面板坝三维真非线性地震反应分析方法及模型试验验证[J].水利学报,2003,(9):12～18.ZHAO Jianming,WANG Wenshao,CHANG Yaping.3-D Authentic Nonlinear Dynamic Analysis Method of High CFRD andVerification by Model Test Data[J].Journal of Hydraulic Engineering.2003,(9):12～18.(in Chinese)
[5]赵剑明,陈宁,常亚屏,等.龙首二级面板堆石坝地震永久变形分析.世界地震工程[J],2003,19(4):57～62.ZHAO Jianming,CHEN Ning,CHANG Yaping,et al.Study on earthquake-induced permanent deformation of Longtoushi CFRD[J].World Earthquake Engineering,2003,19(4):57～62.(in Chinese)
[6]赵剑明,刘小生,陈宁,等.高心墙堆石坝的极限抗震能力研究[J].水力发电学报,2009,28(5):97～102.ZHAO Jianming,LIU Xiaosheng,CHEN Ning,et al.Research on the maximum anti-seismic capability of high earth core rock-fill dam[J].Journal of Hydroelectric Engineering.2009,28(5):97～102.(in Chinese)
[7]赵剑明,温彦锋,刘小生,等.深厚覆盖层上高土石坝极限抗震能力分析[J].岩土力学,2010,31(s1):41～47.ZHAO Jianming,WEN Yanfeng,LIU Xiaosheng,et al.Study on the maximum anti-seismic capability of high earth-rock dam on deepriverbed alluviums[J].Rock and Soil Mechanics.2010,31(s1):41～47.(in Chinese)
[2]陈生水,霍家平,章为民.“5.12”汶川地震对紫坪铺混凝土面板堆石坝的影响及原因分析[J].岩土工程学报,2008,30(6):795～801.CHEN Shengshui,HUO Jiaping,ZHANG Weimin.Analysis of effect of“5.12”Wenchuan Earthquake on Zipingpu CFRD[J].Chinese Journal of Geotechnical Engineering,2008,30(6):795～801.(in Chinese)
[3]赵剑明,刘小生,温彦锋,等.紫坪铺大坝汶川地震震害分析及高土石坝抗震减灾研究设想[J].水力发电,2009,35(5):11～14.ZHAO Jianming,LIU Xiaosheng,WEN Yanfeng,et al.Earthquake damages of Zipingpu CFRD in Wenchuan Earthquake and studyproposal on seismic fortification of high rock-fill dam[J].Water Power,2009,35(5):11～14.(in Chinese)
[4]赵剑明,汪闻韶,常亚屏,等.高面板坝三维真非线性地震反应分析方法及模型试验验证[J].水利学报,2003,(9):12～18.ZHAO Jianming,WANG Wenshao,CHANG Yaping.3-D Authentic Nonlinear Dynamic Analysis Method of High CFRD andVerification by Model Test Data[J].Journal of Hydraulic Engineering.2003,(9):12～18.(in Chinese)
[5]赵剑明,陈宁,常亚屏,等.龙首二级面板堆石坝地震永久变形分析.世界地震工程[J],2003,19(4):57～62.ZHAO Jianming,CHEN Ning,CHANG Yaping,et al.Study on earthquake-induced permanent deformation of Longtoushi CFRD[J].World Earthquake Engineering,2003,19(4):57～62.(in Chinese)
[6]赵剑明,刘小生,陈宁,等.高心墙堆石坝的极限抗震能力研究[J].水力发电学报,2009,28(5):97～102.ZHAO Jianming,LIU Xiaosheng,CHEN Ning,et al.Research on the maximum anti-seismic capability of high earth core rock-fill dam[J].Journal of Hydroelectric Engineering.2009,28(5):97～102.(in Chinese)
[7]赵剑明,温彦锋,刘小生,等.深厚覆盖层上高土石坝极限抗震能力分析[J].岩土力学,2010,31(s1):41～47.ZHAO Jianming,WEN Yanfeng,LIU Xiaosheng,et al.Study on the maximum anti-seismic capability of high earth-rock dam on deepriverbed alluviums[J].Rock and Soil Mechanics.2010,31(s1):41～47.(in Chinese)
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