Three-dimensional finite element study of a single pile response to multidirectional lateral loadings incorporating the simplified state-dependent dilatancy model
Three-dimensional finite element study of a single pile response to multidirectional lateral loadings incorporating the simplified state-dependent dilatancy model
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DOI：
10.1016/j.compgeo.2013.01.007
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发表时间：
2013-05
影响因子：
5.3
通讯作者：
D. Su;Jinhui Li
中科院分区：
文献类型：
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作者：
D. Su;Jinhui Li
海浪和风会对桩产生横向荷载，这种荷载往往是多向的。利用有限元分析程序ABAQUS研究了单桩在单向和多向水平荷载作用下的响应。实现了状态相关剪胀模型的简化版本，并将其嵌入到程序中，以模拟桩周围土壤的行为。分析结果表明，在多向荷载作用下，桩在同一水平方向上的横向阻力比单向荷载下的水平阻力小。桩端位移路径的长径比越大，阻力减小的程度越大。在多向载荷作用下，力增量向量和位移增量向量的方向一般是非共轴的。多向荷载作用下的桩土相互作用和土体反应也明显不同于单向荷载作用下的桩土相互作用。
Waves and winds can induce lateral loads on piles, which are often multidirectional. The objective of this study is to investigate the response of a single pile subjected to unidirectional and multidirectional lateral loadings using the finite element analysis program ABAQUS. A simplified version of the state-dependent dilatancy model was implemented and embedded into the program to simulate the behavior of the soil around the pile. The results of the analyses indicate that the lateral resistance of the pile along one horizontal direction under multidirectional loading is lower than that under unidirectional loading. The degree of reduction of the resistance increases with the aspect ratio of the displacement path at the pile head. The directions of the force increment vector and the displacement increment vector are generally non-coaxial under multidirectional loading. The soil-pile interaction and soil responses under multidirectional loading are also significantly different than those under unidirectional loading.