地基辐射阻尼对高拱坝非线性地震反应的影响
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摘要
本文建立了一种拱坝-地基-库水系统地震反应分析的非线性有限元模型,可以同时考虑无限地基的辐射阻尼、坝体混凝土损伤开裂非线性和坝体横缝非线性等影响高拱坝地震反应的关键因素。利用所建立的有限元模型,以我国拟建的大岗山高拱坝为例,分析研究了地基辐射阻尼对坝体混凝土损伤开裂和坝体横缝开度的影响。结果表明,地基辐射阻尼可以明显减小强地震荷载作用下,坝体中上部的损伤开裂程度和坝体横缝的最大张开度,并改变其分布规律。
A nonlinear finite element model is developed for analyzing the seismic response of arch dam-foundation rock-reservoir system.The radiation damping of infinite foundation rock,damage of dam concrete and opening of contraction joint can be considered simultaneously in this model.The model is applied to analyze the Dagangshan high arch dam with height 210m.The effect of radiation damping on damage of dam concrete and opening of contraction joints are investigated.The results show that the radiation damping can reduce the seismic damage of the upper-middle portion of the dam and the maximum joint openings under strong earthquake.
A nonlinear finite element model is developed for analyzing the seismic response of arch dam-foundation rock-reservoir system.The radiation damping of infinite foundation rock,damage of dam concrete and opening of contraction joint can be considered simultaneously in this model.The model is applied to analyze the Dagangshan high arch dam with height 210m.The effect of radiation damping on damage of dam concrete and opening of contraction joints are investigated.The results show that the radiation damping can reduce the seismic damage of the upper-middle portion of the dam and the maximum joint openings under strong earthquake.
引文
[1]Zhang Chuhan,Xu Yanjie,Wang Guanglun,Jin Feng.Earthquake behavior of arch dams[C]//China Earthquake Engineering Frontiers inthe New Millennium.Spencer&Hu(eds),2001.
[2]陈厚群.高拱坝抗震设计研究进展[J].中国水电,2000,(9):62-68.
[3]林皋.拱坝抗震分析与安全评价的近代发展[C]//水电2006国际研讨会论文集.2006:420-428.
[4]Fenves GL,Mojtahedi S,Reimer R B.ADAP88:a computer programfor nonlinear earthquake analysis of concrete arch dams[R].Report No.EERC89-12,Earthquake Engineering Research Center,University of California,Berkeley,CA,1989.
[5]Lau D T,Noruziaan B,Razaqpura AG.Modelling of contractionjoint and shear sliding effects on earthquake response of arch dams[J].Earthquake Engineering and Structural Dynamics,1998,27:1013-1029.
[6]Zhang Chuhan,Xu Yanjie,Wang Guanglun,Jin Feng.Non-linear seismic response of arch dams with contraction joint opening andjoint reinforcements[J].Earthquake Engineering and Structural Dynamics,2000,29:1547-1566.
[7]龙渝川,周元德,张楚汉.基于两类横缝接触模型的拱坝非线性动力响应研究[J].水利学报,2005,36(9):1094-1099.
[8]杜修力,陈厚群,侯顺载.拱坝系统三维非线性地震波动分析[J].地震工程与工程振动,1996,16(3):39-47.
[9]徐艳杰,张楚汉,金峰.非线性拱坝-地基动力相互作用的FE-BE-IBE模型[J].清华大学学报(自然科学版),1998,38(11):99-103.
[10]杜修力,涂劲,陈厚群.有缝拱坝-地基系统非线性地震波动反应分析方法[J].地震工程与工程振动,2000,20(1):11-20.
[11]林皋,胡志强,陈健云.考虑横缝影响的拱坝动力分析[J].地震工程与工程振动,2004,24(6):45-52,72.
[12]Camara R J.A method for coupled arch dam-foundation-reservoir seismic behavior analysis[J].Earthquake Engineering and Structural Dynamics,2000,29:441-460.
[13]Hall J F.Efficient non-linear seismic analysis of arch dams[J].Earthquake Engineering and Structural Dynamics,1998,27:1425-1444.
[14]潘坚文,王进廷,张楚汉.超强震作用下拱坝的损伤开裂分析[J].水利学报,2007,38(2):143-149.
[15]李静,陈健云,白卫峰.基于应变率相关的非线性损伤模型在高拱坝横缝开度分析中的应用[J].水利学报,2005,36(7):870-875.
[16]Niwa A,Clough R W.Nonlinear seismic response of arch dams[J].Earthquake Engineering and Structural Dynamics,1982,10:267-281.
[17]Hillerborg A,Modeer M,Petersson P E.Analysis of crackformation and crack growthin concrete by means of fracture mechanics andfinite elements[J].Cement and Concrete Research,1976,6(6):773-782.
[18]Bazant Z P,Oh B H.Crack band theory for fracture of concrete[J].Materiaux Constructions,1983,16(93):155-177.
[19]Lubliner J,Oliver J,Oller S,Onate E.A Plastic-damage model for concrete[J].International Journal of Solids and Structures,1989,25(3):299-326.
[20]Lee J,Fenves L G.Plastic-damage model for cyclic loading of concrete structures[J].Journal of Engineering Mechanics,1998,124(3):892-900.
[21]杜修力,赵密,王进廷.近场波动模拟的人工应力边界条件[J].力学学报,2006,107(1):49-56.
[22]吴智敏,黄承逵,赵国藩.大尺寸混凝土试件的断裂能[J].大连理工大学学报,1996,36(6):782-784.
[2]陈厚群.高拱坝抗震设计研究进展[J].中国水电,2000,(9):62-68.
[3]林皋.拱坝抗震分析与安全评价的近代发展[C]//水电2006国际研讨会论文集.2006:420-428.
[4]Fenves GL,Mojtahedi S,Reimer R B.ADAP88:a computer programfor nonlinear earthquake analysis of concrete arch dams[R].Report No.EERC89-12,Earthquake Engineering Research Center,University of California,Berkeley,CA,1989.
[5]Lau D T,Noruziaan B,Razaqpura AG.Modelling of contractionjoint and shear sliding effects on earthquake response of arch dams[J].Earthquake Engineering and Structural Dynamics,1998,27:1013-1029.
[6]Zhang Chuhan,Xu Yanjie,Wang Guanglun,Jin Feng.Non-linear seismic response of arch dams with contraction joint opening andjoint reinforcements[J].Earthquake Engineering and Structural Dynamics,2000,29:1547-1566.
[7]龙渝川,周元德,张楚汉.基于两类横缝接触模型的拱坝非线性动力响应研究[J].水利学报,2005,36(9):1094-1099.
[8]杜修力,陈厚群,侯顺载.拱坝系统三维非线性地震波动分析[J].地震工程与工程振动,1996,16(3):39-47.
[9]徐艳杰,张楚汉,金峰.非线性拱坝-地基动力相互作用的FE-BE-IBE模型[J].清华大学学报(自然科学版),1998,38(11):99-103.
[10]杜修力,涂劲,陈厚群.有缝拱坝-地基系统非线性地震波动反应分析方法[J].地震工程与工程振动,2000,20(1):11-20.
[11]林皋,胡志强,陈健云.考虑横缝影响的拱坝动力分析[J].地震工程与工程振动,2004,24(6):45-52,72.
[12]Camara R J.A method for coupled arch dam-foundation-reservoir seismic behavior analysis[J].Earthquake Engineering and Structural Dynamics,2000,29:441-460.
[13]Hall J F.Efficient non-linear seismic analysis of arch dams[J].Earthquake Engineering and Structural Dynamics,1998,27:1425-1444.
[14]潘坚文,王进廷,张楚汉.超强震作用下拱坝的损伤开裂分析[J].水利学报,2007,38(2):143-149.
[15]李静,陈健云,白卫峰.基于应变率相关的非线性损伤模型在高拱坝横缝开度分析中的应用[J].水利学报,2005,36(7):870-875.
[16]Niwa A,Clough R W.Nonlinear seismic response of arch dams[J].Earthquake Engineering and Structural Dynamics,1982,10:267-281.
[17]Hillerborg A,Modeer M,Petersson P E.Analysis of crackformation and crack growthin concrete by means of fracture mechanics andfinite elements[J].Cement and Concrete Research,1976,6(6):773-782.
[18]Bazant Z P,Oh B H.Crack band theory for fracture of concrete[J].Materiaux Constructions,1983,16(93):155-177.
[19]Lubliner J,Oliver J,Oller S,Onate E.A Plastic-damage model for concrete[J].International Journal of Solids and Structures,1989,25(3):299-326.
[20]Lee J,Fenves L G.Plastic-damage model for cyclic loading of concrete structures[J].Journal of Engineering Mechanics,1998,124(3):892-900.
[21]杜修力,赵密,王进廷.近场波动模拟的人工应力边界条件[J].力学学报,2006,107(1):49-56.
[22]吴智敏,黄承逵,赵国藩.大尺寸混凝土试件的断裂能[J].大连理工大学学报,1996,36(6):782-784.
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