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| 成层土中基于虚土桩模型的桩基纵向振动响应 | |
| 引用本文： | 吴文兵,王奎华,杨冬英,马少俊,马伯宁.成层土中基于虚土桩模型的桩基纵向振动响应[J].中国公路学报,2012,25(2):72-80. |
| 作者姓名： | 吴文兵 王奎华 杨冬英 马少俊 马伯宁 |
| 作者单位： | 1. 浙江大学软弱土与环境土工教育部重点实验室,浙江杭州310058／中国地质大学（武汉）工程学院,湖北武汉430074 2. 浙江大学软弱土与环境土工教育部重点实验室,浙江杭州,310058 3. 浙江大学软弱土与环境土工教育部重点实验室,浙江杭州310058／苏州科技学院土木工程学院,江苏苏州215011 |
| 基金项目： | 国家自然科学基金项目(50879077);浙江省重点创新团队支持计划项目(2009R50050) |
| 摘 要： | 基于虚土桩模型,对成层广义Voigt地基中桩基纵向振动响应进行研究。将桩截面面积范围内有限层桩端土模拟为与桩完全接触的虚土桩,桩侧土采用广义Voigt模型,结合Laplace变换求得了瞬态半正弦脉冲荷载作用下桩顶频域响应的解析解及时域响应的半解析解;同时采用参数研究方法讨论了单层桩端土和双层桩端土情况下,土层参数对桩顶振动响应的影响,并将虚土桩模型与其他桩端土支承模型进行了对比;最后将理论结果与实际工程桩实测曲线进行了拟合对比。结果表明：该虚土桩模型较为合理,能够较真实地反映桩土相互作用机理。 |
| 关 键 词： | 桥梁工程 虚土桩模型 Laplace变换 纵向振动 成层土 广义Voigt模型 |
Longitudinal Dynamic Response to the Pile Embedded in Layered Soil Based on Fictitious Soil Pile Model |
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| WU Wen-bing,WANG Kui-hua,YANG Dong-ying,MA Shao-jun,MA Bo-ning.Longitudinal Dynamic Response to the Pile Embedded in Layered Soil Based on Fictitious Soil Pile Model[J].China Journal of Highway and Transport,2012,25(2):72-80. | |
| Authors: | WU Wen-bing WANG Kui-hua YANG Dong-ying MA Shao-jun MA Bo-ning |
| Institution: | 1(1.MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China;2.School of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,Hubei,China;3.School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,Jiangsu,China) |
| Abstract: | Based on fictitious soil pile model,the longitudinal dynamic response to the pile under axial dynamic loading in layered general Voigt foundation was presented.The finite soil layers under the pile were modeled as fictitious soil pile in the range of cross-section area with the pile and the surrounding layered soils which were described with general Voigt model.By means of Laplace transform,the analytical solutions were obtained for the vertical dynamic response in the frequency domain and the relevant semi-analytical solutions in the time domain at condition of transient half cycle sine wave shaped on the pile top.Subsequently,the influence of parameters of pile end soil on the dynamic response at the pile top was investigated through parametric study method.Fictitious soil pile model and other pile end soil supporting model were compared.Theoretical result and field measurement curves of pile were fitted and compared.It has verified rationality of fictitious soil pile. |
| Keywords: | bridge engineering fictitious soil pile model Laplace transform longitudinal vibration layered soil general Voigt model |
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