| 成层液化土中单桩-土-结构系统的水平振动分析 |
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| 引用本文： | 杨骁,何光辉.成层液化土中单桩-土-结构系统的水平振动分析[J].上海大学学报(自然科学版),2011(6):779-784. |
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| 作者姓名： | 杨骁 何光辉 |
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| 作者单位： | 上海大学土木工程系; |
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| 基金项目： | 上海市自然科学基金资助项目(06ZR14037); 国家自然科学基金资助项目(10872124) |
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| 摘 要： | 根据地震场地液化特征,将土层分为上部液化土层与下部非液化土层,并基于桩-土相互作用的Winkler模型,将桩等效为Rayleigh梁.建立了考虑上部结构的质量、转动惯量、桩身转动惯量和轴力效应的单桩-土-结构系统的控制方程和边界条件,在频率域给出了问题的解析封闭解.通过与相关实验结果的比较,验证模型和解析解的合理性和有效性,分析几何、物理参数等对单桩-土-结构系统位移放大因子、动力放大因子的影响.研究结果表明:桩身轴力使系统的基频更加趋向地震的主频;土壤的液化使得上部结构动力响应更加剧烈,随着土体液化程度的发展,桩的临界载荷将减小,最终导致桩发生失稳破坏.
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| 关 键 词： | 桩-土-结构相互作用 土体液化 Winkler模型 动力特性 失稳破坏 |
Analysis of Horizontal Vibration of Pile-Soil-Superstructure System in Layered Liquefiable Soil |
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| YANG Xiao,HE Guang-hui.Analysis of Horizontal Vibration of Pile-Soil-Superstructure System in Layered Liquefiable Soil[J].Journal of Shanghai University(Natural Science),2011(6):779-784. |
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| Authors: | YANG Xiao HE Guang-hui |
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| Institution: | YANG Xiao,HE Guang-hui(Department of Civil Engineering,Shanghai University,Shanghai 200072,China) |
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| Abstract: | According to the characteristics of liquefiable soil in earthquake,we divide the liquefiable soil layer into a top liquefied layer and a bottom non-liquefied layer.Based on the Winkler model for the pile-soil interaction and treating the pile as a Rayleigh beam,the governing equations and the corresponding boundary conditions for interaction of the single pile-soil-superstructure are established.This is done by taking into account the mass and inertia moment of the superstructure,and the inertia moment and ... |
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| Keywords: | pile-soil-superstructure interaction soil liquefaction Winkler model dynamic behavior unstable failure |
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