东北大学学报(自然科学版) ›› 2024, Vol. 45 ›› Issue (11): 1604-1611.DOI: 10.12068/j.issn.1005-3026.2024.11.011

• 资源与土木工程 • 上一篇    下一篇

含小型粗骨料UHPC中栓钉连接件的抗剪性能

王衍1(), 王者超2, 李昌昊3, 崔鹏4   

  1. 1.东北大学 资源与土木工程学院,辽宁 沈阳 110819
    2.东北大学 深部金属矿山安全开采教育部重点实验室,辽宁 沈阳 110819
    3.中交公路规划设计院有限公司,北京 100088
    4.北京城建设计发展集团股份有限公司,北京 100034
  • 收稿日期:2023-05-29 出版日期:2024-11-15 发布日期:2025-02-24
  • 通讯作者: 王衍
  • 作者简介:王 衍(1990-),男,辽宁辽阳人,东北大学讲师
    王者超(1980-),男,山东高唐人,东北大学教授,博士生导师.
  • 基金资助:
    辽宁省自然科学基金资助项目(2023BSBA103);东北大学博士后基金资助项目(01270012810282);国家自然科学基金重点资助项目(52038003)

Shear Performance of Headed Studs in UHPC Containing Small Coarse Aggregates

Yan WANG1(), Zhe-chao WANG2, Chang-hao LI3, Peng CUI4   

  1. 1.School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China
    2.Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Northeastern University,Shenyang 110819,China
    3.CCCC Highway Consultants Co. ,Ltd. ,Beijing 100088,China
    4.Beijing Urban Construction Design and Development Group Co. ,Ltd. ,Beijing 100045,China.
  • Received:2023-05-29 Online:2024-11-15 Published:2025-02-24
  • Contact: Yan WANG
  • About author:WANG Yan, E-mail: wangyan2@mail.neu.edu.cn

摘要:

随着钢-超高性能混凝土(ultra?high performance concrete, UHPC)轻型组合梁跨径不断增加,梁内水平剪力增幅明显,故栓钉连接件的抗剪性能设计愈加关键.通过标准推出试验研究钢-含小型粗骨料UHPC板间栓钉抗剪力学性能,揭示了标准推出试件的荷载-滑移量行为与破坏模式,提出了单钉抗剪刚度和单钉抗剪承载力计算方法.试验结果表明:推出试件破坏模式为栓钉连接件根部被剪断,推出试件破坏滑移量在0.5~1.2 mm之间,单钉极限抗剪强度为400.7 MPa.理论计算结果表明:依据现有规范,按照破坏荷载0.5倍或滑移量达到0.2 mm时,设计栓钉抗剪刚度偏安全,单钉抗剪承载力范围为95.51~129.20 kN,是试验值的62.7%~84.8%.含小型粗骨料UHPC板中栓钉连接件在设计时,抗剪刚度应考虑折减系数为0.57~0.73,承载能力无需折减.

关键词: 组合结构, 栓钉连接件, 超高性能混凝土, 抗剪刚度, 抗剪承载力

Abstract:

With the increasing span of steel-UHPC lightweight composite girders and the horizontal shear force in girders, the design of shear performance of headed studs in the lightweight composite girders becomes increasingly critical. The shear performance of headed studs between steel and UHPC with small coarse aggregates is studied via standard push?out specimens. The load?slippage behavior and failure mode of standard specimens are revealed, and the calculation methods for shear stiffness and capacity of single headed stud are proposed. Test results show that the failure mode of specimens is that the roots of headed studs are cut off. The failure slippage range of the push?out specimen is between 0.5~1.2 mm, and the ultimate shear strength of the single headed stud is 400.7 MPa. Theoretical calculation results show that according to existing design specifications, the shear stiffness is designed safely at the half failure load or the slippage of 0.2 mm. The design shear capacity of the single headed stud is calculated in the range of 95.51~129.20 kN, which was only 62.7%~84.8% of the test results. Therefore, when designing headed studs for UHPC deck panels with small coarse aggregates, the shear stiffness should consider a reduction coefficient of 0.57~0.73, and the shear capacity should not be reduced.

Key words: composite structure, headed stud, ultra?high performance concrete, shear stiffness, shear capacity

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