| 林煜铭，杨健，谢东东，王星尔，宋春雨.浮式风机钢-混组合立柱的HSEC切条试件抗弯性能研究[J].海洋工程,2025,(3):70~83 |
| 浮式风机钢-混组合立柱的HSEC切条试件抗弯性能研究 |
| Study on the flexural performance of HSEC strip specimens in steel-concrete composite columns for floating offshore wind turbines |
| 投稿时间：2024-04-21 修订日期：2024-07-11 |
| DOI：10.16483/j.issn.1005-9865.2025.03.007 |
| 中文关键词: 海上浮式风机结构 超高性能混凝土 单侧钢板-混凝土 抗弯性能 用钢量 |
| 英文关键词:floating offshore wind turbine structures ultra-high-performance concrete single-sided steel plate-concrete flexural performance steel usage |
| 基金项目:国家自然科学基金资助项目（52078293） |
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| 中文摘要: |
| 基于单侧钢板-端部约束超高性能混凝土（HSEC）的组合形式，研究浮式风机立柱结构的HSEC切条构件抗弯性能。通过试验研究超高性能混凝土（ultra-high-performance concrete，简称UHPC）强度、跨度和拉结筋间距对构件抗弯性能的影响。结果表明：试件受弯无端部滑移呈正截面破坏，且均达到较高承载力并展现出良好的延性。钢板的材料性能得到充分利用，拉结筋和端部型钢协同提升试件延性。采用有限元分析端部约束和拉结筋对抗弯性能的作用，探究用钢参数对抗弯性能的影响。结果显示，提升钢板强度、含钢率或配筋率，均可有效提升极限承载力，且保持延性的正截面破坏模式。无端部型钢约束时，端部产生相对滑移破坏，整体呈脆性的斜截面破坏模式，且承载力较低；UHPC受端部约束时，保持拉结筋间距并适当减小拉结筋直径，将提高拉结筋的强度利用率且保持其良好的抗弯性能，端部型钢和拉结筋协同确保试件的组合效应和整体承载性能。 |
| 英文摘要: |
| Based on the composite form of single-sided steel plate and end-constrained ultra-high-performance concrete (HSEC), this study investigates the flexural performance of HSEC strip components in floating wind turbine column structures. Experimental research was conducted to examine the effects of ultra-high-performance concrete (UHPC) strength, span length, and tie bar spacing on the flexural performance of the specimens. The results indicate that the specimens exhibited positive-section failure without end slippage, achieving high load-bearing capacity and demonstrating good ductility. The material properties of the steel plate were fully utilized, while the tie bars and end-section steel collaborated to enhance ductility. Finite element analysis was used to examine the effects of end constraints and tie bars on flexural performance, as well as the influence of steel usage parameters. The analysis results show that increasing steel plate strength, steel content, or reinforcement ratio effectively improves the ultimate load-bearing capacity while maintaining a positive-section failure mode with good ductility. In the absence of end-section steel constraints, relative slippage failure occurred at the ends, resulting in a brittle shear-section failure mode with lower load-bearing capacity. When UHPC was constrained at the ends, maintaining tie bar spacing and appropriately reducing tie bar diameter improved tie bar strength utilization while maintaining good flexural performance. The synergy between end-section steel and tie bars ensured the composite effect and overall load-bearing performance of the specimens. |
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