The performance of monopiles in cohesive soils is great interest for future offshore wind farm developments, particularly under the cyclic loads experienced ocean environment. Clay behaviour during undrained loading complex and involves accumulation plastic strains, generation excess pore-water pressures degradation initial stiffness. In this paper, a laterally-loaded monopile spatially variabl...

Foundation scour has long been a concern in the offshore wind industry as it poses great threat to safety of turbines (OWTs). However, current understanding this issue is still insufficient. This because many farm factors and their coupling effect on have not fully investigated. Therefore, two phases experimental studies are conducted paper investigate how monopile vibration, water flow, interm...

In recent years, Chinese offshore wind farms have experienced varying degrees of foundation scour since their completion. The maximum depth pile foundations has far exceeded the design depth, which seriously threatens safety turbines. Among current prediction formulas, values calculated by specification 65-1, 65-2 formula are small and results on dangerous side. value American Hec-18 is safe bu...

Currently, p-y models have been broadly adopted for estimating the lateral bearing capacity of large-diameter monopiles in offshore engineering. However, existing curves cannot reflect effect pile diameter D on response under local scouring conditions. In order to extend model a pile, well-calibrated three-dimensional pile-soil performed by ABAQUS is used study ultimate soil resistance P and in...

Thick weldments used in offshore structures frequently act as fatigue crack initiation sites due to stress concentration at weld toe well residual fields. This paper investigates the cyclic deformation behavior of S355 G10+M steel, which is predominantly wind applications. Owing vast size difference monopile structure and cross-section, a global–local finite element (FE) method was used, geomet...