UHPC-钢组合半潜式基础结构设计与稳定性研究OA

Traditional floating offshore wind turbine foundations are typically constructed entirely of steel,making them susceptible to steel corrosion and fatigue in deep and far-sea environments,which significantly reduces their service life.To enhance the structural performance and reduce the construction cost of floating foundations,an ultra-high-performance concrete(UHPC)-Steel hybrid semi-submersible foundation design suitable for 10 MW wind turbines is proposed.Based on the load and resistance factor design method for column-stabilized platforms specified in the DNV standards,and using the OO-Star semi-submersible foundation as a prototype,both all-steel and UHPC-steel hybrid semi-submersible foundations are designed under identical dimensional conditions.The finite element models of the all-steel and UHPC-steel hybrid foundations are established using SESAM software,and their stability under both operational and survival conditions is comparatively analyzed.Finally,a preliminary assessment of their economic differences is conducted.The results indicate that,while meeting the relevant design standards,the UHPC-Steel hybrid semi-submersible foundation demonstrates good technical feasibility and exhibits advantages in stability,durability and economy compared to the all-steel semi-submersible foundation.This study can provide valuable reference for the design of floating wind turbine foundations in deep and far-sea areas in China.