海岸软土地基桩-土相互作用的数值模拟及应用

发布时间：2018-04-17 21:06

本文选题：海岸软土 + 桩-土作用　；参考：《水运工程》2017年12期

【摘要】：桩基础是高桩码头整体结构受力的关键。通过建立桩-土的理论受力模型,对桩体、土体及其相互作用进行理论分析,采用傅里叶级数收敛法对对称的模型进行求逆简化,为计算机求解给定方向。在ANSYS有限元分析软件中通过APDL语言对桩-土相互作用模型进行编程化建模和加载,计算后得出桩体、土体的整体变形规律和桩侧摩阻随桩深的变化规律,将模型计算结果与现有的试验结论进行分析对比。结果表明:傅里叶级数收敛法在对称模型刚度矩阵求逆过程中可以将许多元素变为零,以增加计算机的计算效率;桩体、土体的整体位移在不同荷载作用下发生微小差异,桩土摩擦阻力呈分段线性分布,其中在入土深度32 m处应力达到最大值,在工程中应对该处布置更多纵向持力钢筋。
[Abstract]:Pile foundation is the key to stress on the whole structure of high pile wharf.The theoretical stress model of pile-soil is established, and the pile body, soil mass and their interaction are analyzed theoretically. The Fourier series convergence method is used to inverse simplify the symmetric model and to solve the given direction for the computer.In the finite element analysis software of ANSYS, the pile-soil interaction model is modeled and loaded programmatically by APDL language, and the integral deformation law of pile body and soil mass and the variation law of pile side friction with pile depth are obtained by calculation.The model results are analyzed and compared with the existing experimental results.The results show that the Fourier series convergence method can change many elements to zero in the inverse of the stiffness matrix of the symmetric model, in order to increase the computational efficiency of the computer, and the global displacement of the pile and the soil is slightly different under different loads.The friction resistance of pile and soil is distributed in a piecewise linear manner, in which the stress reaches the maximum value at the depth of 32 m, so more longitudinal reinforcement bars should be arranged in the engineering.
【作者单位】：舟山市水运工程检测中心有限公司;舟山市港航工程规划设计院有限公司;浙江海洋大学港航与交通运输工程学院;
【分类号】：U656.113

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