| Timoshenko模型桩水平振动的非线性动力刚度 |
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| 引用本文： | 秦世伟,史惠质. Timoshenko模型桩水平振动的非线性动力刚度[J]. 土木工程学报, 2011, 0(Z2): 94-97 |
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| 作者姓名： | 秦世伟 史惠质 |
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| 作者单位： | 上海大学; |
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| 基金项目： | 国家自然科学基金(10872124) |
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| 摘 要： | 基于桩水平振动的非线性土阻抗,将桩等效为Timoshenko梁,研究非线性黏弹性土层中端承桩水平振动的动力特性,给出频率域内桩头非线性动力刚度的半解析解,得到桩头动力刚度和阻尼随频率的响应,考察物性和几何参数等对桩头动力刚度和阻尼的影响。结果表明:土非线性降低桩头刚度和阻尼,在第一共振频率处,桩头动力刚度取极小,并且随着桩振幅的增加,土层非线性效应逐步增强,这些结果可以为工程设计提供参考和帮助。
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| 关 键 词： | Timoshenko梁 端承桩 土-桩相互作用 非线性动态刚度 水平振动 |
Nonlinear dynamic stiffnesses of a Timoshenko type pile in horizontal vibration |
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| Qin Shiwei Shi Huizhi. Nonlinear dynamic stiffnesses of a Timoshenko type pile in horizontal vibration[J]. China Civil Engineering Journal, 2011, 0(Z2): 94-97 |
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| Authors: | Qin Shiwei Shi Huizhi |
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| Affiliation: | Qin Shiwei Shi Huizhi (Shanghai University,Shanghai 200072,China) |
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| Abstract: | Based on the nonlinear soil resistance,the dynamic characteristics for the horizontal vibration of a end-bearing pile in a nonlinear viscoelastic soil layer is investigated by regarding the pile as a Timoshenko beam,and semi-analytical expressions for nonlinear dynamic stiffnesses of the pile head is presented in the frequency domain.The variations of the stiffnesses and damping with frequency are shown in figures with the nonlinear iteration procedure.Then,the influences of the material and geometry parame... |
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| Keywords: | Timoshenko beam end-bearing pile pile-soil interaction nonlinear dynamic stiffnesses horizontal vibration |
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