Lateral dynamics of a monopile partially embedded in layered saturated soil with radial disturbance
Lateral dynamics of a monopile partially embedded in layered saturated soil with radial disturbance
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DOI：
10.1016/j.oceaneng.2022.113010
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发表时间：
2022-12
影响因子：
5
通讯作者：
Jue Wang;Ying Xiang;Zhenya Li;D. Looi
中科院分区：
文献类型：
--
作者：
Jue Wang;Ying Xiang;Zhenya Li;D. Looi
提出了一种双向传递矩阵法，用于研究径向扰动下部分嵌入层状饱和土中的横向加载单桩的阻抗。为了表征施工激励或循环侧向激励引起的土体径向特性变化，基于Biot理论建立了饱和土的径向传递矩阵来确定土体对桩身的水平阻力。基于Timoshenko梁理论，通过求解桩身横向振动微分方程，结合轴向传递矩阵处理部分埋置单桩沿土的层状特性，得到单桩顶部的横向、摇摆和横向-摇摆耦合阻抗。通过与已有结果的比较，验证了该模型的有效性。通过对土和桩的特性对横向加载单桩阻抗影响的一系列参数分析，突出了该模型的理论严谨性和广泛的工程适用性。
A bidirectional transfer matrix method is presented to investigate the impedances of a laterally loaded monopile partially embedded in layered saturated soil with radial disturbance. To characterize the radial variation of soil properties induced by construction excitations or cyclic lateral excitations, the radial transfer matrix of the saturated soil is developed to determine the horizontal resistance of soil to the pile shaft based on Biot's theory. Lateral, rocking and lateral-rocking coupled impedances at the head of the monopile are obtained by solving the differential equations for transverse vibration of the pile shaft based on the Timoshenko beam theory, combined with an axial transfer matrix to treat the layered property of soil along the partially embedded monopile. The proposed model is validated by comparing it with some existing results. The theoretical rigour and broad engineering applicability of the present model are highlighted by a series of parametric analyses for the influences of soil and pile properties on the impedances of the laterally loaded monopile.