基于地震动土压力非线性分布的集中参数法研究
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摘要
为简化结构与土体之间接触面的相互作用,提出采用集中参数法进行分析,即在满足Mononobe-Okabe理论基本假设的前提下,给出了在有土体表面均布荷载作用下地震加速度沿挡土墙高度均匀与线性分布的地震动土压力非线性分布,类比水体附加质量原理,推导了基于给出的地震作用下非线性动土压力分布的附加质量计算公式,给出了土体附加刚度在集中参数中的模拟,并进行了算例验证。结果表明,采用集中参数法模拟在地震作用下土体对挡土结构的作用简便、有效、实用。
In order to simplify the contact surface interaction between structure and soil mass,concentrated parameter method is proposed.If the conditions of Mononobe-Okabe theory are met,the nonlinear distribution of seismic earth pressure under action of uniform load on soil surface are given in case of uniform and linear distribution of seismic acceleration along the height of retaining wall.Referring to the theory of water additional mass,it deduces the formula of soil additional mass based on the given linear distribution of seismic earth pressure.The soil additional stiffness is simulated with concentrated parameters.An example is used to verify the formula and concentrated parameter model.The results show that the proposed method is simple and effective for simulating the effect of soil mass on retaining structures under the action of seismic load;and it can be widely used in engineering.
In order to simplify the contact surface interaction between structure and soil mass,concentrated parameter method is proposed.If the conditions of Mononobe-Okabe theory are met,the nonlinear distribution of seismic earth pressure under action of uniform load on soil surface are given in case of uniform and linear distribution of seismic acceleration along the height of retaining wall.Referring to the theory of water additional mass,it deduces the formula of soil additional mass based on the given linear distribution of seismic earth pressure.The soil additional stiffness is simulated with concentrated parameters.An example is used to verify the formula and concentrated parameter model.The results show that the proposed method is simple and effective for simulating the effect of soil mass on retaining structures under the action of seismic load;and it can be widely used in engineering.
引文
[1]王立强,王元战,迟丽华.挡土墙地震土压力及其分布[J].中国港湾建设,2007(5):1-5.
[2]Ichibara M,Matsuzawa H.Earth Pressure duringEarthquake[J].Soil and Foundation,1973,13(1):75-86.
[3]Sherif M A,Ishibash I I,Lee C D.Earth PressuresAgainst Rigid Retaining Walls[J].Journal of theGeotechnical Engineering Division,1982,108(5):679-695.
[4]Sherif M A,Fang Y S.Dynamic Earth Pressures onWalls Rotating about the Top[J].Soils and Founda-tions,1984,24(4):109-117.
[5]张永兴,陈林,陈建功.地震作用下挡土墙主动土压力分布与侧压力系数[A].自主创新与持续增长第十一届中国科协年会论文集(1)[C].重庆,2009:684-697.
[6]刘忠玉,杨会朋,何盛东.刚性挡土墙地震主动土压力的非线性分布[J].郑州大学学报(工学版),2004,25(2):36-38,43.
[7]林宇亮,杨果林,赵炼恒,等.地震动土压力水平层分析法[J].岩石力学与工程学报,2010,25(12):2 581-2 591.
[8]张永兴,刘世安,陈建功.土体对悬臂挡墙模态的影响与应用[J].土木建筑与环境工程,2009,31(3):72-77.
[9]吴军帅,姜朴.土与混凝土接触面的动力剪切特性[J].岩土工程学报,1992,14(2):61-66.
[10]刘金龙,陈陆望,栾茂田.挡土墙土压力非线性分布的计算方法研究[J].重庆建筑大学学报,2008,30(4):87-90.
[11]陈丽.基于数值模拟软件的重力式挡墙抗震性能研究[D].成都:西南交通大学,2010.
[2]Ichibara M,Matsuzawa H.Earth Pressure duringEarthquake[J].Soil and Foundation,1973,13(1):75-86.
[3]Sherif M A,Ishibash I I,Lee C D.Earth PressuresAgainst Rigid Retaining Walls[J].Journal of theGeotechnical Engineering Division,1982,108(5):679-695.
[4]Sherif M A,Fang Y S.Dynamic Earth Pressures onWalls Rotating about the Top[J].Soils and Founda-tions,1984,24(4):109-117.
[5]张永兴,陈林,陈建功.地震作用下挡土墙主动土压力分布与侧压力系数[A].自主创新与持续增长第十一届中国科协年会论文集(1)[C].重庆,2009:684-697.
[6]刘忠玉,杨会朋,何盛东.刚性挡土墙地震主动土压力的非线性分布[J].郑州大学学报(工学版),2004,25(2):36-38,43.
[7]林宇亮,杨果林,赵炼恒,等.地震动土压力水平层分析法[J].岩石力学与工程学报,2010,25(12):2 581-2 591.
[8]张永兴,刘世安,陈建功.土体对悬臂挡墙模态的影响与应用[J].土木建筑与环境工程,2009,31(3):72-77.
[9]吴军帅,姜朴.土与混凝土接触面的动力剪切特性[J].岩土工程学报,1992,14(2):61-66.
[10]刘金龙,陈陆望,栾茂田.挡土墙土压力非线性分布的计算方法研究[J].重庆建筑大学学报,2008,30(4):87-90.
[11]陈丽.基于数值模拟软件的重力式挡墙抗震性能研究[D].成都:西南交通大学,2010.
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