强震区心墙土石坝地震反应三维非线性分析
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摘要
地震对土石坝的危害已经为工程界所广泛认识和重视,尤其"5.12"汶川大地震后,西部强震区土石坝的抗震安全性已成为人们普遍关注的关键技术问题。论文结合东风水库土石坝工程,基于动力分析中的等效线性模型,采用三维非线性动力有限元法,对心墙土石坝进行了地震反应分析,揭示坝体动应力、动应变、加速度、残余变形等分布规律,对土石坝的抗震安全性进行评价,为工程的除险加固设计提供了参考依据。
It is generally accepted and emphasized that earthquake could cause a great harm to earth-rock dam.After the Wunchuan earthquake,seismic safety of earthrock dam in meizoseismal areas has been a key technological problem widely concerned.An equivalent linear model and a 3D nonlinear dynamic finite element method were adopted to analyze the seismic response of dam structure for the Dongfeng earth-rock dam,and the space distributions of dynamic stress,strain,acceleration,permanent deformation,etc,are obtained.This paper,through an evaluation of aseismic safety,may provide reasonable references for danger-eliminating and reinforcing design.
It is generally accepted and emphasized that earthquake could cause a great harm to earth-rock dam.After the Wunchuan earthquake,seismic safety of earthrock dam in meizoseismal areas has been a key technological problem widely concerned.An equivalent linear model and a 3D nonlinear dynamic finite element method were adopted to analyze the seismic response of dam structure for the Dongfeng earth-rock dam,and the space distributions of dynamic stress,strain,acceleration,permanent deformation,etc,are obtained.This paper,through an evaluation of aseismic safety,may provide reasonable references for danger-eliminating and reinforcing design.
引文
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[4]MEJIA L H.Three dimensional dynamic response analysis of earth dam[R].Report No.UCB/ERRC-81/15.Berkeley:University ofCalifornia,1981.
[5]DUNCAN J M,WONG K S,OZAWA Y.FEADAM:A computer program for finite element analysis of dams[R].Report No.UCB/GT/80-02.Berkeley:University of California,1980.
[2]倪汉根,金崇磐.大坝抗震特性与抗震计算[M].大连:大连理工大学出版社,1994.NI Hangen,JIN Chongpan.Anti-seismic characteristics and calculation of dam[M].Dalian:Dalian University of Technology Press,1994.(in Chinese)
[3]杨光,雷红军,于玉贞,等.糯扎渡高心墙堆石坝的抗震措施研究[J].水力发电学报,2008,27(4):89~93.YANG Guang,LEI Hongjun,YU Yuzhen,et al.Research on aseismatic measures of Nuozhadu high core rockfill dam[J].Journal ofHydroelectric Engineering,2008,27(4):89~93.(in Chinese)
[4]MEJIA L H.Three dimensional dynamic response analysis of earth dam[R].Report No.UCB/ERRC-81/15.Berkeley:University ofCalifornia,1981.
[5]DUNCAN J M,WONG K S,OZAWA Y.FEADAM:A computer program for finite element analysis of dams[R].Report No.UCB/GT/80-02.Berkeley:University of California,1980.
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