水利水电技术（中英文）2025，Vol.56Issue(3)：110-122,13.DOI:10.13928/j.cnki.wrahe.2025.03.009
钢筋对海上风电承台混凝土的温度场及应力场的影响研究
Study on the influence of reinforcement on the temperature field and stress field of concrete for offshore wind power platform
摘要
Abstract
The offshore wind turbine foundation is composed of massive reinforced concrete.Apart from its crack-limiting effect,steel reinforcement can also enhance the load-bearing capacity of the concrete structure and influence the development and distribution of the temperature field.The role of steel reinforcement cannot be neglected in the simulation analysis of the temperature and stress fields of the foundation.While the precise algorithm for simulating every steel reinforcement bar is computationally intensive,the average equivalent algorithm based on reinforcement ratio neglects the interaction between steel reinforcement and concrete.Therefore,an equivalent calculation method for thermal and mechanical parameters of massive reinforced concrete is proposed,aiming to reflect the macroscopic role of steel reinforcement while considering its local effects.Then the accuracy of these method in predicting the temperature and stress field changes of reinforced concrete were verified by using simplified models.Taking the Leting offshore wind turbine foundation as a case study,this paper compares the Equivalent Reinforced Concrete(ERC)model with the Plain Pile-cap Concrete(PPC)model to analyze the effect of reinforcement on temperature and stress changes in foundation concrete.Simulation result reveal that reinforcement can lower the maximum temperature of the foundation concrete,with a reduction of about 1.2℃ at the center of the foundation and more than 8℃ in areas with dense reinforcement,while also decreasing the internal-external temperature difference.The surface concrete of the foundation experiences tensile stress during the early stages of heating,and the internal concrete of the foundation develops tensile stress during the later stages of cooling.Under the influence of reinforcement,the former was reduced by 0.34 MPa,a reduction rate of 22.37％,and the latter was reduced by 0.87 MPa,a reduction rate of 24.79％.Acting as a low thermal resistance pathway,the reinforcement's high thermal conductivity effectively lowers the maximum temperature and the internal-external temperature difference in the foundation concrete,reducing the stress induced by temperature.Additionally,the difference in the coefficient of thermal expansion between steel and concrete result in compressive stress in the surrounding concrete during the later stages of cooling,further decreasing the maximum tensile stress in the internal concrete areas of the foundation,thereby reducing the risk of cracking in the foundation concrete.关键词
海上风电承台/大体积混凝土/钢筋仿真/导热作用/温度应力/混凝土/变形/力学性能Key words
offshore wind turbine foundations/mass concrete/reinforcement simulation/heat conduction/temperature stress/concrete/deformation/mechanical property分类
水利科学引用本文复制引用
谭妮,张国新,项建强,周兴政..钢筋对海上风电承台混凝土的温度场及应力场的影响研究[J].水利水电技术（中英文）,2025,56(3):110-122,13.基金项目
国家重点研发计划项目(2021YFC3090102) （2021YFC3090102）
中国三峡新能源(集团)股份有限公司科研项目(FQHX/0052-2020) （集团）
