重力坝-库水-地基相互作用分析方法比较研究
|
摘要
对5种不同高度的重力坝分别采用流固耦合模型与附加质量模型进行了坝体-库水系统相互作用的时域地震动分析.将这两种模型计算所得动水压力结果与Westergaard公式解析解相比较可知,约70m高的中低重力坝采用Westergaard公式计算动水压力就能满足工程实际的要求;对于160m以上的中高重力坝,采用流固耦合模型计算库水作用及坝体动力响应较为接近现实情况.从坝体频率、位移、峰值加速度(PGA)三个方面的结果可以看出,附加质量模型模拟地震条件下库水对坝体作用较流固耦合模型有一定的夸大,对中高坝而言更为显著.地基对200m级高坝库水作用的影响非常明显,在计算坝体与库水相互作用时地基作用不可忽略;对于70m高的中低坝,地基作用可以不用考虑.
Earthquake analyses of gravity dams with five different heights in time domains are performed on the fluid-structure coupling model and the added mass model respectively.The hydrodynamic pressures obtained from the two models are compared with Westergaard solutions,and the comparative results show that the accurate results of hydrodynamic pressure can be obtained by Westergaard formula for middle and low dams with the height of about 70m,but reasonable results of the dynamic responses of dam-reservoir system should be obtained by the fluid-structure coupling model for high dams with the height of above 160m.Based on the comparison between the results from fluid-structure coupling model and the added mass model for dynamic responses of dam-reservoir system,it is found that the results of the added mass model are larger than those of fluid-structure coupling model in the views of fundamental frequencies,displacements and peak ground acceleration(PGA)of dams.As for the dams with a height of about 200m,the influence of foundation on damreservoir interaction is significant and must be considered.As for the dams with a height of about 70 m,the influence of foundation can be neglected.
Earthquake analyses of gravity dams with five different heights in time domains are performed on the fluid-structure coupling model and the added mass model respectively.The hydrodynamic pressures obtained from the two models are compared with Westergaard solutions,and the comparative results show that the accurate results of hydrodynamic pressure can be obtained by Westergaard formula for middle and low dams with the height of about 70m,but reasonable results of the dynamic responses of dam-reservoir system should be obtained by the fluid-structure coupling model for high dams with the height of above 160m.Based on the comparison between the results from fluid-structure coupling model and the added mass model for dynamic responses of dam-reservoir system,it is found that the results of the added mass model are larger than those of fluid-structure coupling model in the views of fundamental frequencies,displacements and peak ground acceleration(PGA)of dams.As for the dams with a height of about 200m,the influence of foundation on damreservoir interaction is significant and must be considered.As for the dams with a height of about 70 m,the influence of foundation can be neglected.
引文
[1]Westergaard H M.Water pressures on dams during earthquakes[J].Transactions of the American Society of Civil Engineers,1933,98(2):418-433.
[2]Chakrabarti P,Chopra A K.Hydrodynamic pressures and response of gravity dams to vertical earthquake component[J].Earthquake Engineering&Structural Dynamics,1972,1(4):325-335.
[3]Chakrabarti P,Chopra A K.Earthquake analysis of gravity dams including hydrodynamic interaction[J].Earthquake Engineering&Structural Dynamics,1973,2(2):143-160.
[4]Chopra A K.Earthquake response of concrete gravity dams[J].Journal of the Engineering Mechanics Division,ASCE,1970,96(4):443-454.
[5]Chopra A K,Gupta S.Hydrodynamic and foundation interaction effects in earthquake response of a concrete gravity dam[J].Journal of the Structural Division,1981,107(8):1399-1412.
[6]Chopra A K,Chakrabarti P.Earthquake analysis of concrete gravity dams including dam-waterfoundation rock interaction[J].Earthquake Engineering&Structural Dynamics,1981,9(4):363-383.
[7]Fenves G,Chopra A K.Effects of reservoir bottom absorption on earthquake response of concrete gravity dams[J].Earthquake Engineering&Structural Dynamics,1983,11(6):809-829.
[8]Darbre G R.Phenomenological two-parameter model for dynamic dam-reservoir interaction[J].Journal of Earthquake Engineering,1998,2(4):513-524.
[9]Dominguez J,Maeso O.Earthquake analysis of arch dams.II:Dam-water-foundation interaction[J].Journal of Engineering Mechanics,1993,119(3):513-530.
[10]Maeso O,Aznarez J J,Dominguez J.Effects of space distribution of excitation on seismic response of arch dams[J].Journal of Engineering Mechanics,2002,128(7):759-768.
[11]Maeso O,Aznarez J J,Dominguez J.Threedimensional models of reservoir sediment and effects on the seismic response of arch dams[J].Earthquake Engineering&Structural Dynamics,2004,33(10):1103-1123.
[12]Brathez H A,Heilbron C H.Discussion of water pressures on dams during earthquakes[J].Transactions of the American Society of Civil Engineers,1933,98(2):434-470.
[13]杜修力,王进廷.动水压力及其对坝体地震反应影响的研究进展[J].水利学报,2001,46(7):13-21.DU Xiu-li,WANG Jin-ting.Review of studies on the hydrodynamic pressure and its effects on the seismic response of dams[J].Journal of Hydraulic Engineering,2001,46(7):13-21.(in Chinese)
[14]DU Xiu-li,WANG Jin-ting.Seismic response analysis of arch dam-water-rock foundation systems[J].Earthquake Engineering and Engineering Vibration,2004,3(2):283-291.
[15]杜修力,王进廷.拱坝-可压缩库水-地基地震波动反应分析方法[J].水利学报,2002,47(6):83-90.DU Xiu-li,WANG Jin-ting.Analysis method for seismic response of arch dam-compressible waterfoundation systems[J].Journal of Hydraulic Engineering,2002,47(6):83-90.(in Chinese)
[16]林皋,杜建国.基于SBFEM的坝-库水相互作用分析[J].大连理工大学学报,2005,45(5):723-729.LIN Gao,DU Jian-guo.Analysis of dam-reservoir interaction based on SBFEM[J].Journal of Dalian University of Technology,2005,45(5):723-729.(in Chinese)
[17]杜建国.基于SBFEM的大坝-库水-地基动力相互作用分析[D].大连:大连理工大学,2007.DU Jian-guo.The dynamic interaction analysis of dam-reservoir-foundation based on SBFEM[D].Dalian:Dalian University of Technology,2007.(in Chinese)
[18]Parrinello F,Borino G.Lagrangian finite element modelling of dam-fluid interaction:Accurate absorbing boundary conditions[J].Computers&Structures,2007,85(11-14):932-943.
[19]王铭明,陈健云,范书立.重力坝地震动水压力的试验研究[J].水电能源科学,2012,30(5):51-53,89.WANG Ming-ming,CHEN Jian-yun,FAN Shu-li.Experimental study on earthquake hydrodynamic pressure of gravity dam[J].Water Resources and Power,2012,30(5):51-53,89.(in Chinese)
[20]李德玉,张伯艳,王海波,等.重力坝坝体-库水相互作用振动台试验研究[J].中国水利水电科学研究院学报,2003,1(3):216-220.LI De-yu,ZHANG Bo-yan,WANG Hai-bo,et al.A shaking table model test on dam-reservoir interaction of gravity dam[J].Journal of China Institute of Water Resources and Hydropower Research,2003,1(3):216-220.(in Chinese)
[21]宫必宁.重力坝地震动水压力试验研究[J].河海大学学报,1997,25(1):98-102.GONG Bi-ning.Experimental study on earthquake hydrodynamic pressure of gravity dam[J].Journal of Hohai University,1997,25(1):98-102.(in Chinese)
[2]Chakrabarti P,Chopra A K.Hydrodynamic pressures and response of gravity dams to vertical earthquake component[J].Earthquake Engineering&Structural Dynamics,1972,1(4):325-335.
[3]Chakrabarti P,Chopra A K.Earthquake analysis of gravity dams including hydrodynamic interaction[J].Earthquake Engineering&Structural Dynamics,1973,2(2):143-160.
[4]Chopra A K.Earthquake response of concrete gravity dams[J].Journal of the Engineering Mechanics Division,ASCE,1970,96(4):443-454.
[5]Chopra A K,Gupta S.Hydrodynamic and foundation interaction effects in earthquake response of a concrete gravity dam[J].Journal of the Structural Division,1981,107(8):1399-1412.
[6]Chopra A K,Chakrabarti P.Earthquake analysis of concrete gravity dams including dam-waterfoundation rock interaction[J].Earthquake Engineering&Structural Dynamics,1981,9(4):363-383.
[7]Fenves G,Chopra A K.Effects of reservoir bottom absorption on earthquake response of concrete gravity dams[J].Earthquake Engineering&Structural Dynamics,1983,11(6):809-829.
[8]Darbre G R.Phenomenological two-parameter model for dynamic dam-reservoir interaction[J].Journal of Earthquake Engineering,1998,2(4):513-524.
[9]Dominguez J,Maeso O.Earthquake analysis of arch dams.II:Dam-water-foundation interaction[J].Journal of Engineering Mechanics,1993,119(3):513-530.
[10]Maeso O,Aznarez J J,Dominguez J.Effects of space distribution of excitation on seismic response of arch dams[J].Journal of Engineering Mechanics,2002,128(7):759-768.
[11]Maeso O,Aznarez J J,Dominguez J.Threedimensional models of reservoir sediment and effects on the seismic response of arch dams[J].Earthquake Engineering&Structural Dynamics,2004,33(10):1103-1123.
[12]Brathez H A,Heilbron C H.Discussion of water pressures on dams during earthquakes[J].Transactions of the American Society of Civil Engineers,1933,98(2):434-470.
[13]杜修力,王进廷.动水压力及其对坝体地震反应影响的研究进展[J].水利学报,2001,46(7):13-21.DU Xiu-li,WANG Jin-ting.Review of studies on the hydrodynamic pressure and its effects on the seismic response of dams[J].Journal of Hydraulic Engineering,2001,46(7):13-21.(in Chinese)
[14]DU Xiu-li,WANG Jin-ting.Seismic response analysis of arch dam-water-rock foundation systems[J].Earthquake Engineering and Engineering Vibration,2004,3(2):283-291.
[15]杜修力,王进廷.拱坝-可压缩库水-地基地震波动反应分析方法[J].水利学报,2002,47(6):83-90.DU Xiu-li,WANG Jin-ting.Analysis method for seismic response of arch dam-compressible waterfoundation systems[J].Journal of Hydraulic Engineering,2002,47(6):83-90.(in Chinese)
[16]林皋,杜建国.基于SBFEM的坝-库水相互作用分析[J].大连理工大学学报,2005,45(5):723-729.LIN Gao,DU Jian-guo.Analysis of dam-reservoir interaction based on SBFEM[J].Journal of Dalian University of Technology,2005,45(5):723-729.(in Chinese)
[17]杜建国.基于SBFEM的大坝-库水-地基动力相互作用分析[D].大连:大连理工大学,2007.DU Jian-guo.The dynamic interaction analysis of dam-reservoir-foundation based on SBFEM[D].Dalian:Dalian University of Technology,2007.(in Chinese)
[18]Parrinello F,Borino G.Lagrangian finite element modelling of dam-fluid interaction:Accurate absorbing boundary conditions[J].Computers&Structures,2007,85(11-14):932-943.
[19]王铭明,陈健云,范书立.重力坝地震动水压力的试验研究[J].水电能源科学,2012,30(5):51-53,89.WANG Ming-ming,CHEN Jian-yun,FAN Shu-li.Experimental study on earthquake hydrodynamic pressure of gravity dam[J].Water Resources and Power,2012,30(5):51-53,89.(in Chinese)
[20]李德玉,张伯艳,王海波,等.重力坝坝体-库水相互作用振动台试验研究[J].中国水利水电科学研究院学报,2003,1(3):216-220.LI De-yu,ZHANG Bo-yan,WANG Hai-bo,et al.A shaking table model test on dam-reservoir interaction of gravity dam[J].Journal of China Institute of Water Resources and Hydropower Research,2003,1(3):216-220.(in Chinese)
[21]宫必宁.重力坝地震动水压力试验研究[J].河海大学学报,1997,25(1):98-102.GONG Bi-ning.Experimental study on earthquake hydrodynamic pressure of gravity dam[J].Journal of Hohai University,1997,25(1):98-102.(in Chinese)
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