大直径钢筋-UHPC灌浆波纹管的锚固性能

doi:10.3785/j.issn.1008-973X.2026.05.005

浙江大学学报(工学版)

2026, Vol. 60

Issue (5): 954-963 DOI: 10.3785/j.issn.1008-973X.2026.05.005

土木与建筑工程

大直径钢筋-UHPC灌浆波纹管的锚固性能

李嘉航1(

),周敉1,*(

),杨凯2,王帅2

1. 长安大学公路桥梁与隧道陕西省重点实验室，陕西西安 710064
2. 陕西省交通规划设计研究院有限公司，陕西西安 710068

Anchorage performance of large-diameter rebar-UHPC grouting bellows

Jiahang LI1(

),Mi ZHOU1,*(

),Kai YANG2,Shuai WANG2

1. Shaanxi Provincial Major Laboratory for Highway Bridge & Tunnel, Chang’an University, Xi’an 710064, China
2. Shaanxi Provincial Transport Planning Design and Research Institute Co. Ltd, Xi’an 710068, China

全文: PDF(3735 KB) HTML

摘要：

设计并制作4组使用40 mm直径钢筋作为锚固的足尺UHPC灌浆波纹管连接件模型，开展单侧拉拔试验. 建立经试验验证的UHPC灌浆波纹管连接件有限元模型，以钢筋直径、钢筋锚固长度和波纹管直径为参数进行拓展参数化分析. 基于支持向量机（SVM）对采用16~50 mm直径钢筋作为锚固钢筋的灌浆波纹管连接件进行分类和预测. 结果表明：当波纹管长度不小于15倍钢筋直径，钢筋锚固长度不小于12倍钢筋直径时，可保证不发生钢筋拔出破坏. 结合有限元模型计算36 mm直径及以上钢筋的建议锚固长度和波纹管的建议外径取值，SVM分类模型预测使用16~50 mm直径钢筋作为锚固钢筋连接件的破坏模式的准确率为86%.

关键词： 大直径钢筋; 灌浆波纹管; 单侧拉拔试验; 有限元模型; 支持向量机(SVM)

Abstract:

Four groups of UHPC grouting bellows connectors were designed and fabricated using 40 mm diameter rebars as anchorage, and unilateral pullout tests were carried out. Finite-element models of the experimentally verified UHPC grouting bellows connectors were established, and an expanded parameterization analysis was carried out by taking the diameter of the rebars, the anchor length of the rebars, and the diameter of the bellows as the parameters. The grouted bellows connectors, which used 16 to 50 mm diameter rebars as anchorage, were classified and predicted using a support vector machine (SVM). Results show that pullout damage can be prevented when the bellows length is at least 15 times the rebar diameter and the anchorage length is at least 12 times the rebar diameter. Based on the finite-element models, the recommended anchorage length for rebars of 36 mm diameter and above and the recommended outer diameter of bellows were calculated. The accuracy of the SVM classification model in predicting the damage mode reached 86% for connectors with 16 to 50 mm diameter rebars as anchorage.

Key words: large-diameter rebar grouting bellows unilateral pullout tests finite-element models support vector machine(SVM)

收稿日期: 2025-05-31 出版日期: 2026-05-06

CLC:

U 445

基金资助: 国家自然科学基金资助项目（51978062）；陕西省重点研发计划项目（2024SF-YBXM-644）；陕西省交通科研项目（22-05K）；山西省交通科技项目（2021-02-03）.

通讯作者: 周敉 E-mail: 2783590746@qq.com;zhoumi@chd.edu.cn

作者简介: 李嘉航（1999—），男，博士生，从事桥梁抗震研究. orcid.org/0009-0008-6864-2356. E-mail：2783590746@qq.com

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引用本文:

李嘉航,周敉,杨凯,王帅. 大直径钢筋-UHPC灌浆波纹管的锚固性能[J]. 浙江大学学报(工学版), 2026, 60(5): 954-963.

Jiahang LI,Mi ZHOU,Kai YANG,Shuai WANG. Anchorage performance of large-diameter rebar-UHPC grouting bellows. Journal of ZheJiang University (Engineering Science), 2026, 60(5): 954-963.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2026.05.005 或 https://www.zjujournals.com/eng/CN/Y2026/V60/I5/954

图 1 大直径钢筋-UHPC灌浆波纹管连接件构造示意图

表 1 大直径钢筋-UHPC灌浆波纹管拉拔试验设计

表 2 UHPC拌合物各组分的质量组成

图 2 UHPC灌浆波纹管连接件制作过程示意图

图 3 UHPC灌浆波纹管连接件的单侧拉拔试验加载装置示意图

图 4 UHPC灌浆波纹管连接件破坏模式剖面示意图

表 3 大直径钢筋-UHPC灌浆波纹管拉拔试验结果

图 5 试验加载后的UHPC灌浆波纹管连接件

图 6 UHPC灌浆波纹管连接件的应力-位移曲线

图 7 钢材的应力-应变曲线

图 8 混凝土损伤塑性模型

图 9 拉拔试验有限元模型

图 10 UHPC灌浆波纹管连接件的应力-位移曲线（数值模拟与试验结果对比）

表 4 UHPC灌浆波纹管连接件单侧拉伸试验与模拟结果对比

表 5 有限元模型尺寸参数

图 11 有限元模型几何构造

表 6 有限元模型单侧拉拔试验结果

图 12 确定钢筋临界锚固长度

图 13 不同孔径比对应混凝土和UHPC的压应力

表 7 不同模型的波纹管和钢筋笼应力

图 14 受试者工作特征曲线

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