Abstract:Considering cyclic softening effect of soft soil foundation, cyclic strength of soft soil was embedded in the framework of the general finite element software ABAQUS by secondary development. Then, taking into account the pseudo-static analysis, it has been formulated a calculation model about the structural stability of the inverse T-type breakwater with jackets and pile foundations. Cyclic bearing capacities of the structures under action of wave load have been analyzed with the finite element method, and the influence of cyclic-softening effect of soft soil foundation on structural failure mode as well as the influence of structure size parameters on cyclic bearing capacity has been discussed. The results show that the cyclic bearing capacity of the inverse T-type breakwater with jackets and pile foundations is clearly lower than the ultimate bearing capacity without considering cyclic-softening effect of soft soil, and the rate of reduction is between 28.72% and 41.20% for the structure model. In consideration of the cyclic softening effect of soft soil, the failure mode of the structure may change from structure displacement for piles body yielding to structural failure caused by soil strength insufficient.