风电塔筒-基础界面T形开孔板连接件抗剪性能研究

张树琛; 杨勇; 顾江龙; 温开华; 刘享阳

doi:10.3724/j.gyjzG25102903

风电塔筒-基础界面T形开孔板连接件抗剪性能研究

doi: 10.3724/j.gyjzG25102903

1. 西安建筑科技大学土木工程学院, 西安 710055;
2. 西安建筑科技大学, 结构工程与抗震教育部重点实验室, 西安 710055;
3. 中国电建集团江西省电力设计院有限公司, 南昌 330096

基金项目:

陕西省重点科技创新团队项目（2024RS-CXTD-37）。

详细信息

作者简介:
张树琛,博士研究生,主要从事钢-混凝土组合结构方向研究,18291927831@163.com。

通讯作者:
杨勇,博士,教授,主要从事钢-混凝土组合结构方向研究,yyhhp2004@163.com。

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出版历程
- 收稿日期: 2025-10-29
- 网络出版日期: 2026-11-06

Research on the Shear Performance of T-PBL Connectors at the Wind Turbine Tower-Foundation Interface

1. College of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China;
2. Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education (XAUAT), Xi'an 710055, China;
3. PowerChina Jiangxi Electric Power Design Institute Co., Ltd., Nanchang 330096, China

摘要

摘要: 随着风电机组向大型化和高荷载方向发展，塔筒-基础连接界面的受力性能愈加重要。为提高界面的协同作用与锚固性能，提出一种新型T形开孔板（T-PBL）连接件。该连接件在传统开孔板（PBL）连接件的端部增设翼缘板并采用错孔布置方式，以改善孔间应力分布、提高抗压与抗剪性能，并增强对混凝土的约束作用。设计并开展了8个T-PBL连接件推出试验，以孔洞横向间距和翼缘宽度为主要研究参数，系统分析了其破坏模式、荷载-滑移曲线、抗剪承载力、抗剪刚度及延性性能，并提出了T-PBL连接件的抗剪承载力计算方法。结果表明：T-PBL连接件的破坏形态主要表现为混凝土板开裂破坏及局部孔周混凝土压碎，且钢板开孔和贯穿钢筋均发生明显的局部塑性变形；T-PBL连接件表现出良好的抗剪承载力、抗剪刚度及延性性能；当孔洞横向间距由0增加至80 mm时，抗剪承载力增加约26.1%，而抗剪刚度降低约12.9%；随着翼缘宽度增加，抗剪承载力和刚度均呈先增后减的变化趋势。基于试验结果，提出考虑翼缘宽度及孔洞间距影响的T-PBL连接件的抗剪承载力计算公式，计算结果与试验值吻合较好。
- 风电塔筒-基础界面 /
- T-PBL连接件 /
- 推出试验 /
- 抗剪承载力 /
- 抗剪刚度
Abstract: With the development of wind turbines toward large capacities and higher loads， the mechanical properties of the tower-foundation interface have become increasingly critical. To enhance the composite action and anchorage performance of the interface， this study proposes a novel T-PBL connector. The connector is developed by adding flange plates at the ends of traditional PBL connectors and adopting a staggered hole arrangement， aiming to improve the stress distribution between holes， increase compressive and shear capacities， and enhance the confinement effect on the concrete. Eight push-out tests on T-PBL connectors were designed and conducted to investigate their shear performance， with the transverse hole spacing and flange width being selected as the main research parameters. The failure modes， load-slip responses， shear bearing capacity， shear stiffness， and ductility were systematically analyzed， and a shear capacity calculation method for T-PBL connectors was proposed. The results revealed that the failure mode of the T-PBL connectors was primarily characterized by cracking of the concrete slab and local crushing of the concrete around the holes， while noticeable local plastic deformation occurred in both the steel plate holes and the penetrating bars. The T-PBL connectors exhibited excellent shear bearing capacity， shear stiffness， and ductility. When the transverse hole spacing increased from 0 to 80 mm， the shear bearing capacity increased by approximately 26.1%， while the shear stiffness decreased by about 12.9%. With the increase in flange width， both shear bearing capacity and stiffness exhibited a trend of first increasing and then decreasing. Based on the experimental results， a shear bearing capacity calculation formula considering the effects of flange width and hole spacing was proposed. The calculated values showed good agreement with the test results.
- wind turbine tower-foundation interface /
- T-PBL connectors /
- push-out test /
- shear bearing capacity /
- shear stiffness

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