脱空及修复对超高性能混凝土栓钉连接件抗剪性能的影响试验

doi:10.3973/j.issn.2096-4498.2025.12.006

隧道建设（中英文） ›› 2025, Vol. 45 ›› Issue (12): 2257-2265.DOI: 10.3973/j.issn.2096-4498.2025.12.006

脱空及修复对超高性能混凝土栓钉连接件抗剪性能的影响试验

郭亚唯¹，王军²，姚沅³，朱尧于¹

（1. 中交公路长大桥建设国家工程研究中心有限公司，北京 100088；2. 广西横钦高速公路有限公司，广西钦州 535000； 3. 葛洲坝集团交通投资有限公司，湖北武汉 430000）

出版日期:2025-12-20 发布日期:2025-12-20
作者简介:郭亚唯（1989—），男，河北廊坊人，2017年毕业于大连海事大学，交通运输工程专业，硕士，高级工程师，现从事高性能结构技术研发与推广应用工作。E-mail： guoyawei@bnerc.com。

Influence of Voids and Repairs on Shear Performance of Ultrahigh-Performance Concrete Stud Connectors

GUO Yawei¹, WANG Jun², YAO Yuan³, ZHU Yaoyu¹

(1. CCCC Highway Bridges National Engineering Research Centre Co., Ltd., Beijing 100088, China; 2. Guangxi Hengqin Expressway Co., Ltd., Qinzhou 535000, Guangxi, China; 3. GEZHOUBA Group Transportation Investment Co., Ltd., Wuhan 430000, Hubei, China)

Online:2025-12-20 Published:2025-12-20

摘要/Abstract

摘要： 为合理评估局部混凝土脱空对栓钉连接件抗剪性能的影响程度，探讨脱空修复措施对栓钉连接件抗剪性能恢复的有效性，以脱空深度、脱空率为脱空缺陷变化参数，并采用超高性能混凝土灌浆修复措施，开展超高性能混凝土脱空及修复对栓钉连接件抗剪性能的影响试验。试验结果表明： 1）所有试件均以栓钉剪断破坏为主要标志，超高性能混凝土板未出现明显开裂，脱空及修复对试件最终破坏模式几乎无影响； 2）脱空可导致栓钉抗剪承载力和抗剪刚度显著下降，且随脱空深度增大，抗剪性能呈降低趋势，脱空对抗剪刚度的影响程度高于抗剪承载力； 3）脱空率对栓钉抗剪性能影响不明显； 4）对深度20 mm的脱空采用超高性能混凝土灌注修复后，可提升试件的抗剪承载力和抗剪刚度，且抗剪刚度提升效果优于抗剪承载力，但脱空修复后栓钉抗剪性能仍未恢复至未脱空时的水平，抗剪承载力和抗剪刚度分别较未脱空时降低22.7%和10.2%。最后，基于试验数据提出考虑脱空缺陷的超高性能混凝土栓钉连接件抗剪承载力计算公式。

关键词: 栓钉连接件, 超高性能混凝土, 抗剪性能, 推出试验, 混凝土脱空, 脱空修复

Abstract: The authors rationally evaluate the impact of local concrete voids on the shear performance of stud connectors and investigate the effectiveness of void repair measures in restoring connector performance. Ultrahigh-performance concrete (UHPC) grouting is used in the experiments, with void depth and void ratio as parameters representing void defects. The influence of UHPC voids and their repair on the mechanical properties of stud connectors is examined experimentally. The following findings are obtained: (1) All specimens are mainly characterized by stud shear failure, without noticeable cracking in the UHPC slabs; voids and repairs have minimal impact on the final failure mode of the specimens. (2) Voids cause a substantial decrease in the shear capacity and shear stiffness of the studs. With increasing void depth, the shear performance declines, with the impact on shear stiffness being more pronounced than that on shear capacity. (3) The void ratio does not influence the shear performance of the studs. (4) The use of UHPC grouting to repair 20-mm-deep voids enhances the shear capacity and shear stiffness of specimens, with a greater enhancement effect on shear stiffness than on shear capacity. However, the shear performance of the studs after repair does not recover to the level of void-free specimens: shear capacity and shear stiffness are 22.7% and 10.2% lower, respectively, than those of the void-free specimens. A calculation formula for shear capacity of stud connectors considering UHPC voids is proposed based on the experimental data.

Key words: stud connector, ultrahigh-performance concrete, shear resistance, push-out test, concrete voiding, void repairing

郭亚唯, 王军, 姚沅, 朱尧于. 脱空及修复对超高性能混凝土栓钉连接件抗剪性能的影响试验[J]. 隧道建设, 2025, 45(12): 2257-2265.

GUO Yawei, WANG Jun, YAO Yuan, ZHU Yaoyu. Influence of Voids and Repairs on Shear Performance of Ultrahigh-Performance Concrete Stud Connectors[J]. Tunnel Construction, 2025, 45(12): 2257-2265.

脱空及修复对超高性能混凝土栓钉连接件抗剪性能的影响试验

Influence of Voids and Repairs on Shear Performance of Ultrahigh-Performance Concrete Stud Connectors

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

编辑推荐

Metrics

本文评价