| 引用本文: | 崔春义,孟坤,梁志孟,赵会杰.双向非均质黏性阻尼土中管桩纵向振动特性[J].哈尔滨工业大学学报,2020,52(11):113.DOI:10.11918/201904050 |
| CUI Chunyi,MENG Kun,LIANG Zhimeng,ZHAO Huijie.Vertical vibration impedance of pipe pile embedded in radially and vertically inhomogeneous layered soil with viscous damping[J].Journal of Harbin Institute of Technology,2020,52(11):113.DOI:10.11918/201904050 |
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| 摘要: |
| 管桩施工会使土体产生扰动,从而引起桩周土体沿桩基径向的不均匀性,为同时考虑桩周土体此种径向非均质效应和纵向成层特性对管桩纵向振动动力阻抗的影响规律,提出基于土体黏性阻尼的多圈层平面应变模型,建立双向非均质土中管桩纵向振动简化分析模型,利用拉普拉斯变换和阻抗函数的传递性,推导得出管桩桩顶动力阻抗解析解答,计算结果表明,纵向软硬夹层对一定低频区间内动力阻抗曲线振幅水平影响显著,夹层越软（硬）,共振频率处对应的动力阻抗曲线振幅水平越高（低）.施工扰动引起桩周土径向非均匀性对管桩桩顶复刚度曲线影响显著,在对管桩进行纵向振动特性分析时宜采用双向非均质黏性阻尼土-管桩相互作用模型推导所得解析解答更为合理. |
| 关键词: 管桩 径向非均质 纵向成层 复刚度传递 动力阻抗 |
| DOI：10.11918/201904050 |
| 分类号:TU443 |
| 文献标识码:A |
| 基金项目:国家自然科学基金面上项目(9,1, 51578100)；中央高校基本科研业务费专项资金(3132019601);大连理工大学海岸和近海工程国家重点实验室开放课题基金(LP1904); “双一流”建设专项(CXXM2019BS008) |
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| Vertical vibration impedance of pipe pile embedded in radially and vertically inhomogeneous layered soil with viscous damping |
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CUI Chunyi,MENG Kun,LIANG Zhimeng,ZHAO Huijie
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(School of Transportation Engineering, Dalian Maritime University, Dalian 116026, Liaoning, China)
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| Abstract: |
| The construction of pipe pile will cause the inhomogeneity of the surrounding soil. By considering the influence of the radial inhomogeneity effect and the vertically layer characteristic on the vertical vibration dynamic impedance of pipe pile, a multi-circle plane strain model based on soil viscous damping was proposed, and a simplified model for vertical vibration analysis of pipe pile in radially and vertically layered soil was established. Based on the Laplace transformation and the transitivity of impedance function, the analytical solution of the dynamic impedance of the pile head was derived. Computational results show that the vertical soft and hard interlayer had a significant effect on the amplitude of the dynamic impedance curve in a certain low frequency range, where the softer (harder) the interlayer was, the higher (lower) the amplitude of the dynamic impedance curve at the resonance frequency became. The radial inhomogeneity caused by construction disturbance had a significant influence on the complex stiffness curve of the pile head. In the analysis of vertical vibration characteristics of pipe piles, the analytical solution derived by the proposed soil-pile interaction model was more reasonable. |
| Key words: pipe pile radially inhomogeneous vertically layer complex stiffness transfer dynamic impedance |
