欢迎访问《硅酸盐通报》官方网站,今天是

硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (4): 1459-1470.DOI: 10.16552/j.cnki.issn1001-1625.2025.0939

• 道路材料 • 上一篇    下一篇

节段预制UHPC大键齿胶接缝直剪性能

陈伟忠1(), 李明阳2, 麦鹏1, 周旋3, 刘旭聪4()   

  1. 1.佛山市建盈发展有限公司,佛山 528000
    2.佛山市交通科技有限公司,佛山 528300
    3.湖南省交通规划勘察设计院有限公司,长沙 410219
    4.湖南大学土木工程学院,长沙 410082
  • 收稿日期:2025-09-22 修订日期:2025-11-24 出版日期:2026-04-20 发布日期:2026-05-14
  • 通信作者: 刘旭聪,博士研究生。E-mail:1364565372@qq.com
  • 作者简介:陈伟忠(1969—),男,高级工程师。主要从事桥梁工程与道路工程研究。E-mail:1337258874@qq.com
  • 基金资助:
    2021年度湖南省交通运输厅科技进步与创新计划项目(202113)

Direct Shear Behavior of Segment Precast UHPC Big Shear Key Epoxy Joints

CHEN Weizhong1(), LI Mingyang2, MAI Peng1, ZHOU Xuan3, LIU Xucong4()   

  1. 1.Foshan Jianying Development Co. ,Ltd. ,Foshan 528000,China
    2.Foshan Traffic Technology Co. ,Ltd. ,Foshan 528300,China
    3.Hunan Provincial Communications Planning,Survey & Design Institute Co. ,Ltd. ,Changsha 410219,China
    4.College of Civil Engineering,Hunan University,Changsha 410082,China
  • Received:2025-09-22 Revised:2025-11-24 Published:2026-04-20 Online:2026-05-14

摘要:

为探究工程设计最优键齿深度h与键齿根部高度H比和键齿倾斜角度θ,研究超高性能混凝土(UHPC)大键齿胶接缝的直剪性能和破坏机制,本文进行了UHPC大键齿胶接缝直剪性能试验。基于试验验证的ABAQUS有限元模型(FEM),采用控制变量法和正交试验设计分析了侧向预应力σθh等参数对键齿试件破坏模式、破坏机制和抗剪承载力的影响,提出了UHPC大键齿胶接缝抗剪承载力计算公式。结果表明,大键齿胶接缝试件破坏模式主要可分为键齿根部的直剪破坏、沿胶接缝界面的滑移破坏和剪压破坏。工程设计应用中,UHPC大键齿胶接缝的h/Hθ建议取值分别为0.19≤h/H≤0.30,15°≤θ≤27°。不同侧向预应力水平、键齿倾斜角度、键齿深度下的抗剪承载力计算值与有限元值比值介于0.88~1.14,平均值为0.94。

关键词: UHPC大键齿胶接缝, 直剪性能, 抗剪强度, 强度计算, 有限元分析

Abstract:

To investigate the optimal shear key depth h and shear key root height H ratio and shear key inclination angle θ in engineering design, this study conducted direct shear tests on ultra-high performance concrete (UHPC) big shear key epoxy joints to explore their shear performance and failure mechanisms. Based on the ABAQUS finite element model (FEM) validated by experiments, the influences of parameters such as lateral prestress σθ, and h on the failure mode, failure mechanism, and shear bearing capacity of shear key specimens were analyzed using the control variable method and orthogonal experimental design. The formula for calculating the shear bearing capacity of UHPC big shear key epoxy joints was proposed. The results show that the failure modes of the specimens are primarily categorized into direct shear failure at shear key root, slip failure along epoxy joint interface, and shear-compression failure. For engineering applications, the recommended ranges for h/H and θ are 0.19≤h/H≤0.30 and 15°≤θ≤27°, respectively. The ratio for theoretical calculation value and the FEM value with difference lateral prestress, inclination angle and shear key depth is between 0.88 to 1.14, with an average value of 0.94.

Key words: UHPC big shear key epoxy joint, direct shear behavior, shear strength, strength calculation, finite element analysis

中图分类号: