加筋挡土墙地震动力响应规律及地震动参数影响研究
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摘要
建立加筋挡土墙数值分析模型,研究在地震作用下加筋挡土墙的动力响应规律,以及地震动参数对加筋挡土墙动力响应的影响。结果表明在地震力作用下,加筋土体抵抗变形的能力高于纯土体,加筋土体对地震波低频部分的放大作用小于纯土体,而对高频部分的滤波作用优于纯土体。墙体加速度峰值放大系数随输入地震波加速度振幅、频率的增加而减小,持时对加速度峰值响应的影响不大;挡墙位移随振幅、持时的增加而显著增大,随频率的增大而减小,其研究结果有助于进一步揭示加筋挡土墙在地震作用下的失稳机制。
A numerical simulation model of reinforced soil retaining wall was established.The dynamic response law of reinforced soil retaining wall and the effect of strong ground motion parameters on its seismic response in earthquake were researched.The results showed that the anti-deformation properties of reinforced soil and its filtering effect on seismic waves with higher frequency were better than pure soil,but the amplification effect of reinforced soil on seismic waves with lower frequency was lower than that of pure soil.It was indicated that the amplification coefficient of peak acceleration of soil retaining wall decreased with the increase of amplitudes and frequencies of earthquakes,while peak acceleration response was less affected by the duration of seismic wave.It was also indicated that the maximum displacement of reinforced soil retaining wall increased with the increase of amplitudes and duration of seismic wave,while decreased with the increase of frequency of seismic wave.The conclusions were helpful to further research on the instability mechanism of reinforced soil retaining wall in earthquakes.
A numerical simulation model of reinforced soil retaining wall was established.The dynamic response law of reinforced soil retaining wall and the effect of strong ground motion parameters on its seismic response in earthquake were researched.The results showed that the anti-deformation properties of reinforced soil and its filtering effect on seismic waves with higher frequency were better than pure soil,but the amplification effect of reinforced soil on seismic waves with lower frequency was lower than that of pure soil.It was indicated that the amplification coefficient of peak acceleration of soil retaining wall decreased with the increase of amplitudes and frequencies of earthquakes,while peak acceleration response was less affected by the duration of seismic wave.It was also indicated that the maximum displacement of reinforced soil retaining wall increased with the increase of amplitudes and duration of seismic wave,while decreased with the increase of frequency of seismic wave.The conclusions were helpful to further research on the instability mechanism of reinforced soil retaining wall in earthquakes.
引文
[1]刘汉龙,费康,高玉峰.边坡地震稳定时程分析方法[J].岩石力学,2003,24(4):553-556.
[2]LIN Meeiling,WANG Kuolung.Seismic slope behavior in a large-scale shaking table model test[J].EngineeringGeology,2006,86(2,3):118-133.
[3]唐洪祥,邵龙潭.地震动力作用下有限元土石坝边坡稳定分析[J].岩石力学与工程学报,2004,23(8):1318-1324.
[4]周永江,王开云,符文熹,等.高地震烈度区堆积体边坡动力响应时程特征分析[J].山地学报,2007,25(1):93-98.
[5]祁生文.单面边坡的两种动力反应形式及其临界高度[J].地球物理学报,2006,49(2):518-523.
[6]陈国兴,庄海洋,杜修力,等.土-地铁隧道动力相互作用的大型振动台试验——试验结果分析[J].地震工程与工程振动,2007,27(1):164-170.
[7]Dennes T.Bergado,Chairat Teerawattanasuk.2D and 3D numeri-cal simulations of reinforced embankments on soft groud[J].Geotextiles and Geomembranes,article in press.
[8]Kerry Rowe R,Craeme D.Skinner.Numerical analysis of geosyn-thetic reinforced rataining wall constructed on a layered soil foun-dation[J].Geotextiles and Geomembranes,2001,19:387-412.
[9]Karpurapu R G,Bathurst R J.Behaviour of Geosynthetic Rein-forced Soil Retaining Walls Using the Finite Element Method[J].Computers and Geotechnics,1995,17:279-299.
[10]Lombaert G,Degrande G,Clouteau D.Numericalmodeling of freefield traffic-induced vibrations[J].SoilDynamics and Earth-quake Engineering,2000,(19):473-488.
[11]Lu Sun.Computer simulation and filed measurement of dynamicpavement loading[J].Mathematics and Computers in Simula-tion,2001,(56):297-313.
[12]徐光兴,姚令侃,等.边坡地震动力响应规律及地震动参数影响研究[J]岩土工程学报,2008,30(6):918-923.
[2]LIN Meeiling,WANG Kuolung.Seismic slope behavior in a large-scale shaking table model test[J].EngineeringGeology,2006,86(2,3):118-133.
[3]唐洪祥,邵龙潭.地震动力作用下有限元土石坝边坡稳定分析[J].岩石力学与工程学报,2004,23(8):1318-1324.
[4]周永江,王开云,符文熹,等.高地震烈度区堆积体边坡动力响应时程特征分析[J].山地学报,2007,25(1):93-98.
[5]祁生文.单面边坡的两种动力反应形式及其临界高度[J].地球物理学报,2006,49(2):518-523.
[6]陈国兴,庄海洋,杜修力,等.土-地铁隧道动力相互作用的大型振动台试验——试验结果分析[J].地震工程与工程振动,2007,27(1):164-170.
[7]Dennes T.Bergado,Chairat Teerawattanasuk.2D and 3D numeri-cal simulations of reinforced embankments on soft groud[J].Geotextiles and Geomembranes,article in press.
[8]Kerry Rowe R,Craeme D.Skinner.Numerical analysis of geosyn-thetic reinforced rataining wall constructed on a layered soil foun-dation[J].Geotextiles and Geomembranes,2001,19:387-412.
[9]Karpurapu R G,Bathurst R J.Behaviour of Geosynthetic Rein-forced Soil Retaining Walls Using the Finite Element Method[J].Computers and Geotechnics,1995,17:279-299.
[10]Lombaert G,Degrande G,Clouteau D.Numericalmodeling of freefield traffic-induced vibrations[J].SoilDynamics and Earth-quake Engineering,2000,(19):473-488.
[11]Lu Sun.Computer simulation and filed measurement of dynamicpavement loading[J].Mathematics and Computers in Simula-tion,2001,(56):297-313.
[12]徐光兴,姚令侃,等.边坡地震动力响应规律及地震动参数影响研究[J]岩土工程学报,2008,30(6):918-923.
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