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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2025, Vol. 44 ›› Issue (5): 8-18.DOI: 10.3969/j.issn.1674-0696.2025.05.02

• 桥梁与隧道工程 • 上一篇    

UHPC外包层-钢管界面黏结抗剪性能非线性分析

秦志清1，吴庆雄2，许志坤2，袁辉辉2   

  1. (1. 福建省交通规划设计院有限公司，福建 福州 350004；2. 福州大学 土木工程学院，福建 福州 350108)
  • 收稿日期:2024-07-10 修回日期:2024-09-13 发布日期:2025-05-23
  • 作者简介:秦志清(1973—)，男，湖南沅江人，教授级高工，主要从事桥梁工程方面的研究。 E-mail: 915081@qq.com 通信作者：袁辉辉（1985—），男，福建柘荣人，研究员，博士，主要从事组合结构方面的研究。E-mail: yuanhh@fzu.edu.cn
  • 基金资助:
    国家自然科学基金项目(51978169); 福建省科技计划项目(2021H6021); 福建省交通运输科技项目(202211)

Nonlinear Analysis of Bonding Shear Properties of UHPC Cladding-Steel Tube Interface

QIN Zhiqing1, WU Qingxiong2, XU Zhikun2, YUAN Huihui2   

  1. (1. Fujian Transportation Planning and Design Institute Co., Ltd., Fuzhou 350004, Fujian, China; 2. College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian, China)
  • Received:2024-07-10 Revised:2024-09-13 Published:2025-05-23

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摘要： 为研究UHPC外包层-钢管界面的黏结抗剪性能，采用大型通用有限元软件ABAQUS建立了UHPC外包层-钢管界面试件的精细化实体有限元模型。对试件各组成部分的材料本构模型和接触关系进行讨论，并与试验结果进行了对比，验证了所建立有限元模型的有效性。进而对不同界面构造措施的UHPC外包层-钢管界面黏结抗剪性能和破坏机理进行了研究，同时进行了构造参数影响分析。研究结果表明: 达到界面承载力时，UHPC外包层-钢管普通界面只剩下摩擦力抵抗界面剪力，而设抗剪连接件界面试件则存在摩擦力和机械咬合力共同抵抗界面剪力；栓钉对提高界面极限黏结抗剪强度的效果最佳；当外包UHPC层厚度小于40 mm时，可采用竖向钢筋或环向钢筋作为界面的抗剪连接件；UHPC外包层-钢管界面黏结抗剪强度随着UHPC强度、外包层厚度以及抗剪连接件直径的增加而增大，而随钢管外径的增大而减小。最后，根据有限元参数分析结果，提出了采用不同界面构造措施的UHPC外包层-钢管界面黏结抗剪强度简化计算方法。

关键词: 桥梁工程；UHPC外包层；钢混连接件；黏结抗剪强度；有限元分析；计算方法

Abstract: To investigate the shear bond properties of ultra-high-performance concrete (UHPC) cladding-steel tube interface, a refined solid finite element model of the UHPC cladding-steel tube interface specimen was established by the large-scale general finite element (FE) software ABAQUS. The material constitutive models and contact relationships of each component of the specimen were discussed, and a comparison was made with experimental results to verify the validity of the established FE model. Furthermore, the bonding shear performance and failure mechanism of different interface construction measures of the UHPC cladding-steel tube interface were studied, meanwhile, the influence of construction parameters was analyzed. The research results show that when reaching the interface bearing capacity, the ordinary interface of the UHPC cladding-steel tube only resists the interface shear force through friction, whereas the interface specimen with shear connectors resists the interface shear force through both friction and mechanical interlocking. The studs have the best effect on increasing the ultimate bond shear strength of the interface. When the thickness of the UHPC cladding layer is less than 40 mm, the vertical or circumferential rebars can be used as the shear connectors at the interface of the UHPC cladding-steel tube. The bonding shear strength of the UHPC cladding-steel tube interface increases with the increase of UHPC strength, cladding thickness and shear connector diameter, while decreases with the increase of steel tube outer diameter. Finally, based on the FE parameter analysis results, a simplified calculation method for the bonding shear strength of the UHPC cladding-steel tube interface with different interface construction measures is proposed.

Key words: bridge engineering; UHPC cladding; steel-concrete connectors; bonding shear strength; finite element analysis; calculation method

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