低频循环荷载对桩基础承载力的影响

Effect of Low-Frequency Cyclic Loading on Bearing Behavior of Pile Foundation

深水环境下的桩基础长期承受潮位的涨跌产生的低频循环荷载,从而增大了桩基础的工后沉降。室内模型试验结果表明,在低频循环荷载作用下,地基土逐渐被压密,从而产生硬化,但硬化的程度无法通过试验进行定量评价。利用ABAQUS有限元软件开展数值模拟,定量评价地基土硬化对桩基础承载性能的影响。

Pile foundation longly bears low - frequency cyclic caused by loading tidal level in deep - water environment, thus cau- sing the post - construction settlement increasing of pile foundation. The research result of indoor model tests indicates that foun- dation soil is pressed consolidation gradually, and leads to be hardened. However, hardeneing degree can＇ t be evaluated quanti- tatively by tests. The paper develop numerical simulation using ABAQUS finite element software to quantitatively evaluate the effect of foundation soil hardening on beating behavior of pile foundation.