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中文核心期刊

土钉土体系统动力模型的建立及地震响应分析

Dynamic calculation model and seismic response for the system of soil nailing and surrounding soil

  • 摘要: 建立了土钉土体系统动力计算模型,这种模型将土体对土钉的作用处理成一个线性弹簧和一个与速度有关的阻尼器,把面板对土钉的惯性作用简化为集中于土钉头上的等效质量加以考虑. 以此为基础,建立土钉土体系统地震动力作用下的阻尼微分方程,求解了在简谐地震作用下土钉动力响应的解析解. 最后,结合一案例进行了分析,并用大型非线性有限元软件ADINA对此计算模型进行了验证,结果表明这种计算模型对土质较均匀的边坡动力设计和分析是安全、可靠、合理的.

     

    Abstract: A dynamic calculation model of soil nailing structure forslope protection is proposed in the present paper. The interaction betweensoil and soil nailing is treated as linear spring and damping system relatedto velocity. The inertia of the facing upon soil nailing is simplified as anequivalent concentrated mass. Excitation equations of vibration responseunder horizontal harmonic earthquake are established, and the analyticalsolutions are obtained for steady vibration. 3D nonlinear FEM with ADINAsoftware is carried out to verify the proposed model. The results show thatthe present model is safe and credible for the design of uniform soil slope.The calculation model provides a new approach for earthquake analysis andantiseismic design of the structure protected by soil nailing.

     

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