Combined compression and bending resistance of steel fibre reinforced concrete tower for wind turbine

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2025-04-01 Epub Date: 2025-01-10 DOI:10.1016/j.tws.2025.112940

Ji-Ke Tan , Ming-Shu Wang , Mei-Ni Su , Kang Wang , Run Liang , Dai Yang

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Abstract

The incorporation of steel fibres in concrete can effectively address the pre-mature cracking and reinforcement congestion issues in wind turbine towers. This study investigated the resistance, failure modes and ductility of steel fibre reinforced concrete (SFRC) towers subjected to the combined compression and bending through cyclic loading tests. Key parameters considered in the study include the wall thickness, the steel fibre dosage, and the methods of tower connection. The results revealed that a greater wall thickness can more effectively reduce crack development. Specimens with 0.8 % steel fibres showed brittle failure, whereas those with 1 % steel fibres exhibited plastic failure. The compression-bending capacity of specimens with epoxy resin applied at connection section increased by 11.4 % compared to the control specimen. Additionally, the study proposed a method for calculating the compression-bending capacity of SFRC tower structures during the post-cracking stage. The predicted values using this design approach closely matched the experimental results, with differences <10 % for all specimens.

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风电机组钢纤维混凝土塔架抗压抗弯综合性能研究

在混凝土中掺入钢纤维可以有效地解决风电塔架的早熟开裂和钢筋堵塞问题。通过循环加载试验，研究了钢纤维混凝土（SFRC）塔在压缩和弯曲联合作用下的抗力、破坏模式和延性。研究中考虑的关键参数包括壁厚、钢纤维用量和塔连接方式。结果表明，较大的壁厚可以更有效地减少裂纹的发展。钢纤维含量为0.8%的试件表现为脆性破坏，而钢纤维含量为1%的试件表现为塑性破坏。连接段应用环氧树脂的试件抗压弯曲能力比对照试件提高了11.4%。此外，本文还提出了一种计算钢纤维塔结构开裂后抗压抗弯能力的方法。使用这种设计方法的预测值与实验结果非常接近，所有样品的差异为10%。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.