Nonlinear Dynamical Characteristics of Piles Under Horizontal Vibration
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摘要: 将桩-土系统看成一个嵌入桩基的粘弹性半空间，利用连续介质力学的方法，在空间柱坐标系中建立了非线性桩-土相互作用的数学模型——桩土耦合的非线性边值问题．在频率域内研究了水平振动下桩基的非线性动力学特性，考察了轴力对桩基非线性动力学特性的影响．研究了多种参数对桩基动力学特性的影响，特别是轴力对桩基刚度的影响A·D2结果表明：在轴力作用下桩基可能丧失承载能力．因此，研究桩基水平振动的力学行为时，必须考察轴力的影响．Abstract: The pile-soil system is regarded as a visco-elastic half-space embedded pile.Based on the method of continuum mechanics,a nonlinear mathematical model of pile-soil interaction was established-a coupling nonlinear boundary value problem.Under the case of horizontal vibration,the nonlinearly dynamical characteristics of pile applying the axis force were studied in horizontal direction in frequency domain.The effects of parameters,especially the axis force on the stiffness were studied in detail.The numerical results suggest that it is possible that the pile applying an axis force will lose its stability.So,the effect of the axis force on the pile is considered.
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