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针对浮式海洋结构采用的桩基础,考虑土的循环软化效应,将软土的循环强度与Mohr-Coulomb屈服准则相结合,基于拟静力弹塑性分析建立了循环波浪载荷作用下斜向抗拔桩循环承载性能的计算模型,确定了斜向上载荷作用下抗拔桩的循环承载力,并与单调加载作用下的斜向抗拔桩的极限承载力进行了对比,进一步探讨了桩长、桩径、桩体模量及载荷循环次数等因素对斜向抗拔桩循环承载力的影响。研究结果表明:循环波浪荷载的作用导致了斜向抗拔桩土体循环强度的分布不均匀,从而降低了地基的循环承载力。斜向抗拔桩的动态极限承载力随循环次数的增加而降低,随桩长、桩径及桩体模量的增大而增大。
Considering the cyclic softening effect of soil, the cyclic strength of soft soil is combined with the Mohr-Coulomb yield criterion. Based on the quasi-static elasto-plastic analysis, the cyclic anti-pull The cyclic loading capacity of the pile is calculated and the cyclic loading capacity of the uplift piles under diagonal upward loading is determined. The ultimate bearing capacity of the diagonal uplift piles under monotonic loading is compared. Diameter, pile modulus and the number of load cycles on the bearing capacity of inclined uplift piles. The results show that the circular wave load leads to the uneven distribution of cyclic strength of inclined uplift piles and the decrease of cyclic bearing capacity. The dynamic ultimate bearing capacity of inclined uplift piles decreases with the increase of cycle number, and increases with the increase of pile length, pile diameter and pile modulus.