| 水平振动下桩基的非线性动力学特性 |
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| 引用本文： | 胡育佳,程昌钧,杨骁.水平振动下桩基的非线性动力学特性[J].应用数学和力学,2005,26(6):645-652. |
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| 作者姓名： | 胡育佳 程昌钧 杨骁 |
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| 作者单位： | 上海大学 力学系,上海 200072 |
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| 基金项目： | 国家自然科学基金资助项目(50278051)，上海市重点学科建设项目 |
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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．
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| 关 键 词： | 桩-土相互作用 连续介质力学 粘弹性半空间 参数研究 桩基的动刚度 |
| 文章编号： | 1000-0887(2005)06-0645-08 |
| 收稿时间： | 2003-12-12 |
| 修稿时间： | 2003年12月12 |
Nonlinear Dynamical Characteristics of Piles Under Horizontal Vibration |
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| HU Yu-jia,Cheng Chang-jun,YANG Xiao.Nonlinear Dynamical Characteristics of Piles Under Horizontal Vibration[J].Applied Mathematics and Mechanics,2005,26(6):645-652. |
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| Authors: | HU Yu-jia Cheng Chang-jun YANG Xiao |
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| Institution: | Shanghai Institute of Applied Mathematics and Mechanics;Department of Mechanics, Shanghai University, Shanghai 200072, P. R. China |
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| 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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| Keywords: | system of pile-soil interaction nonlinear visco-elasticity half-space continuum mechanics parameter study dynamical stiffness |
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