WEN Xiaodong, GONG Wenbo, ZHOU Ming, et al. Effect of shear key arrangement on the bonding properties of prefabricated UHPC-NC interface[J]. Acta Materiae Compositae Sinica, 2025, 42(3): 1588-1600. DOI: 10.13801/j.cnki.fhclxb.20240605.001
Citation: WEN Xiaodong, GONG Wenbo, ZHOU Ming, et al. Effect of shear key arrangement on the bonding properties of prefabricated UHPC-NC interface[J]. Acta Materiae Compositae Sinica, 2025, 42(3): 1588-1600. DOI: 10.13801/j.cnki.fhclxb.20240605.001

Effect of shear key arrangement on the bonding properties of prefabricated UHPC-NC interface

Funds: Basic Public Welfare Research Project of Zhejiang Province (LGG21E080007); Ningbo Natural Science Foundation (202003N4170); Major Project of Science and Technology Innovation in Ningbo (2023Z148)
More Information
  • Received Date: March 24, 2024
  • Revised Date: May 15, 2024
  • Accepted Date: May 24, 2024
  • Available Online: June 17, 2024
  • Published Date: June 05, 2024
  • In order to study the bond-slip behavior of the interface between prefabricated ultra-high performance concrete (UHPC) and normal concrete (NC), 12 sets of UHPC-NC bond specimens were tested using double-sided shear tests with the density and spacing of shear studs on the prefabricated UHPC surface as the experimental parameters. The results show that, after the shear studs being installed on the formwork, there are three main failure modes of the specimens, namely: (a) Shear failure of UHPC-NC bond surface and UHPC shear studs; (b) Shear failure of UHPC-NC bond surface and simultaneous shear and peeling failure of UHPC shear studs; and (c) Shear failure of UHPC-NC bond surface and axial compression failure of NC matrix. The density and distribution interval of shear studs have a significant impact on the shear strength of UHPC-NC bond surface, especially the shear stud density. The shear strength on the bond surface increases parabolically with the density of shear studs. Under the same density of shear stud, the specimens with larger distribution interval of shear stud have a 19.04%-41.74% increase in shear strength on the bond surface, compared to the specimens with smaller distribution interval. On the basis of existing models and experimental results, a calculation formula for the shear strength of prefabricated UHPC-NC bond surface is established. It considers the failure modes of bond surface and the shear testing methods. The calculated results are in good agreement with the experimental values. This can provide a reference for the interface design of UHPC-NC composite specimens.

  • Objective 

    At present, a series of interfacial shear performance tests of UHPC-NC composite members conducted by domestic and foreign scholars mainly show the shear failure of ordinary concrete embedded in pits/keyways, which does not give full play to the performance advantages of UHPC, and the improvement potential of UHPC-NC composite specimens in shear performance needs to be explored. Therefore, in order to explore the bonding and sliding properties of the interface between precast ultra-high performance concrete UHPC and ordinary concrete (NC), the double-sided shear test of 12 sets of UHPC-NC composite specimens was completed.

    Methods 

    Based on the ideas of penetration formwork and concrete transfer technology, the structure setting of UHPC shear nails (that is, a layer of pitted lining plate is pre-laid in the mold, and UHPC shear nails are formed after pouring) is proposed to give full play to the high-strength mechanical properties of UHPC and improve the interface bonding performance of UHPC formwork -NC inner core composite specimen. The shear failure of the composite specimen changed from NC to UHPC. The specific approach of this paper is to prepare UHPC templates with different shear nail density and spacing, and then finally form UHPC-NC composite specimens with different parameters for loading test and obtain data. According to the data, different failure patterns, load-strain relationship, load-slip relationship, interfacial shear strength and shear strength of individual shear nails with different density shear nail structures and different distribution spacing were summarized, so as to explore the law between the density and distribution spacing of shear nails and the shear strength of the bonding surface. Finally, by comparing and analyzing the existing UHPC-NC bonding surface shear strength model and the failure mode of the bonding surface, the failure mode parameters of the bonding surface and the shear test coefficient are introduced, and the quantitative relationship between the new parameters and the shear nail density is fitted according to the test results.

    Results 

    It can be clearly observed from the test results that there are three kinds of failure modes: (a) the UHPC-NC bonding surface and the shear failure of UHPC shear nails; (b) Shear failure of UHPC-NC bonding surface and shear and peel failure of UHPC shear nails; (c) Shear failure of UHPC-NC bonding surface and axial compression failure of NC matrix. During the whole loading process, the strain increases linearly with the increase of load. The slippage increases linearly with the increase of load at first, and then nonlinear with the increase of load when cracks appear at the interface. With the same distribution spacing, the ultimate bearing capacity of the specimen increases with the increase of the density of shear nails. When the density of shear nails is the same, the ultimate bearing capacity of specimens increases with the increase of distribution spacing. The interfacial bond shear strength increases with the increase of shear nail density and distribution spacing. With the increase of the density of shear nails, the shear strength of single nail decreases gradually. The UHPC-NC bond shear strength formula established by introducing relevant parameters has good accuracy, and can be used to evaluate the bond surface shear strength of UHPC-NC composite specimen.Conclusion: (1) When the UHPC template is not equipped with shear nails, the UHPC-NC composite specimen has shear failure on the bonding surface, and the cross section is smooth and flat. When the shear nail structure is set in the formwork, there are three kinds of failure modes: (a) the shear failure between the UHPC-NC bonding plane and the UHPC shear nail; (b) Shear failure of UHPC-NC bonding surface and shear and peel failure of UHPC shear nails; (c) Shear failure of UHPC-NC bonding surface and axial compression failure of NC matrix. When the shear nail density ρ<2.133, Class a failure occurs. When 2.133≤ρ<6.4, the specimen changes from class a failure to Class a failure. When ρ≥6.4, the specimen failure changes to class c failure. (2) The shear strength of the prefabricated UHPC-NC bonding surface is 1.67-6.56MPa, and the shear strength of the shear nail is 0.635MPa, which comes from the mechanical bite force and chemical bonding. Reasonable arrangement of shear nails on the UHPC-NC bonding surface can give full play to the contribution of shear nails to the strength of the bonding surface and greatly improve the shear strength of the bonding surface. (3) The density and distribution spacing of UHPC shear nails have a significant effect on the shear strength of UHPC-NC bonding surface, especially the density of shear nails. The greater the density of shear nails (0-9.6 range), the greater the shear strength of UHPC-NC bonding surface. Combined with the overall shear strength, single nail shear strength and interface failure pattern, the recommended value of shear nail density on UHPC template is 4.27~6.4. Under the condition of the same density of shear nails, the shear strength of the specimen with larger spacing of shear nails increases by 19.04% to 41.74% compared with that of the specimen with smaller spacing of shear nails. (4) The existing shear strength model of the UHPC-NC bonding surface and the fracture morphology of the bonding surface were compared and analyzed. The fracture morphology parameters of the bonding surface and the shear test coefficient were introduced, and the calculation formula for the shear strength of the prefabricated UHPC-NC bonding surface was established. The calculated results were in good agreement with the test values, and could provide a reference for the interface design of the UHPC-NC composite specimen.

  • [1]
    王鹏刚, 赵明海, 田砾, 等. 预制键槽式UHPC与后浇混凝土界面粘结抗剪性能[J]. 复合材料学报, 2024, 41(5): 2633-2644.

    WANG Penggang, ZHAO Minghai, TIAN Li, et al. Shear performance of interface bonding between prefabricated keyway UHPC and post-cast concrete [J][J]. Acta Materiae Compositae Sinica, 2024, 41(5): 2633-2644(in Chinese).
    [2]
    邵旭东, 邱明红, 晏班夫, 等. 超高性能混凝土在国内外桥梁工程中的研究与应用进展[J]. 材料导报, 2017, 31(23): 33-43. DOI: 10.11896/j.issn.1005-023X.2017.023.004

    SHAO Xudong, QIU Minghong, YAN Banfu, et al. A review on the research and application of ultra-high performance concrete in bridge engineering around the world[J]. Materials Reports, 2017, 31(23): 33-43(in Chinese). DOI: 10.11896/j.issn.1005-023X.2017.023.004
    [3]
    李庆华, 徐世烺. 超高韧性水泥基复合材料基本性能和结构应用研究进展[J]. 工程力学, 2009, 26(增刊2): 23-67.

    LI Qinghua, XU Shilang. Performance and application of ultra high toughness cementitious composite[J]. Engineering Mechanics, 2009, 26(Suppl.2): 23-67(in Chinese).
    [4]
    邓明科, 卜新星, 潘姣姣, 等. 型钢高延性混凝土短 柱抗震性能试验研究[J]. 工程力学, 2017, 34(1): 163-170. DOI: 10.6052/j.issn.1000-4750.2015.06.0484

    DENG Mingke, BU Xinxing, PAN Jiaojiao, et al. Experimental study on seismic behavior of steel reinforced high ductile concrete short columns[J]. Engineering Mechanics, 2017, 34(1): 163-170(in Chinese). DOI: 10.6052/j.issn.1000-4750.2015.06.0484
    [5]
    邓明科, 姚昕, 张阳玺, 等. 基于梁式试验的UHPC-高强钢筋搭接黏结性能[J]. 复合材料学报, 2024, 41(10): 5527-5539.

    DENG Mingke, YAO Xin, ZHANG Yangxi, et al. Lap bonding properties of UHPC-high-strength steel bars based on beam test [J]. Acta Materiae Compositae Sinica, 2024, 41(10): 5527-5539(in Chinese).
    [6]
    MUÑOZ M A C, HARRIS D K, AHLBORN T M, et al. Bond performance between ultrahigh-performance concrete and normal-strength concrete[J]. Journal of Materials in Civil Engineering, 2014, 26(8): 04014031. DOI: 10.1061/(ASCE)MT.1943-5533.0000890
    [7]
    BASSAM A T, ABU B H B, MEGAT M A, et al. Microstructural analysis of the adhesion mechanism between old concrete substrate and UHPFC[J]. Journal of Adhesion Science and Technology, 2014, 28(18): 1846-1864. DOI: 10.1080/01694243.2014.925386
    [8]
    王兴旺. UHPC与普通钢筋混凝土结构界面抗剪性能研究[D]. 长沙: 湖南大学, 2016.

    WANG Xingwang. Study on interfacial shear resistance between UHPC and ordinary reinforced concrete structures [D]. Changsha: Hunan University, 2016(in Chinese).
    [9]
    HUSAM H H, KENNETH K W, SHAD M S, et al. Interfacial properties of ultrahigh-performance concrete and high-strength concrete bridge connections[J]. Journal of Materials in Civil Engineering, 2016, 28(5): 04015208. DOI: 10.1061/(ASCE)MT.1943-5533.0001456
    [10]
    张锐, 胡棚, 李晰, 等. U形UHPC永久模板RC无腹筋组合梁抗剪性能试验[J]. 中国公路学报, 2021, 34(8): 145-156. DOI: 10.3969/j.issn.1001-7372.2021.08.013

    ZHANG Rui, HU Peng, LI Xi, et al. Shear behavior of reinforced concrete composite beams without stirrups using U-shaped UHPC permanent formwork[J]. China Journal of Highway and Transport, 2021, 34(8): 145-156(in Chinese). DOI: 10.3969/j.issn.1001-7372.2021.08.013
    [11]
    王德弘, 沈彤, 鞠彦忠, 等. 后浇普通混凝土与预制UHPC的黏结受剪性能研究[J]. 建筑结构学报, 2020, 41(S2): 411-419.

    WANG Dehong, SHEN Tong, JU Yanzhong, et al. Study on bonding shear properties of post-poured ordinary concrete and prefabricated UHPC[J]. Journal of Building Structures, 2020, 41(S2): 411-419(in Chinese).
    [12]
    杨俊, 周建庭, 张中亚, 等. UHPC-NC键槽界面抗剪性能研究[J]. 中国公路学报, 2021, 34(8): 132-144. DOI: 10.3969/j.issn.1001-7372.2021.08.012

    YANG Jun, ZHOU Jianting, ZHANG Zhongya, et al. Study on interfacial shear performance of UHPC-NC keyway[J]. China Journal of Highway and Transport, 2021, 34(8): 132-144(in Chinese). DOI: 10.3969/j.issn.1001-7372.2021.08.012
    [13]
    柴敏, 罗素蓉. 自密实混凝土与老混凝土黏结抗剪性能试验研究[J]. 福州大学学报(自然科学版), 2013, 41(5): 922-927.

    CHAI Min, LUO Surong. Experimental study on shear performance of self-compacting concrete and old concrete[J]. Journal of Fuzhou University (Natural Science Edition), 2013, 41(5): 922-927(in Chinese).
    [14]
    李平先, 赵国藩, 张雷顺. 环氧砂改善新老混凝土黏结强度试验研究[J]. 大连理工大学学报, 2005(2): 255-259. DOI: 10.3321/j.issn:1000-8608.2005.02.021

    LI Pingxian, ZHAO Guofan, ZHANG Leishun. Experimental study on epoxy sand to improve the bond strength of new and old concrete[J]. Journal of Dalian University of Technology, 2005(2): 255-259(in Chinese). DOI: 10.3321/j.issn:1000-8608.2005.02.021
    [15]
    刘传奇. 新旧混凝土界面粘贴机理试验研究[D]. 西安: 长安大学, 2014.

    LIU Chuanqi. Experimental study of old and new concrete interface mechanism of paste[D]. Xi'an: Chang'an University, 2014(in Chinese).
    [16]
    中华人民共和国住房和城乡建设部. 混凝土结构设计规范: GB60010—2010[S] 北京: 中国建筑工业出版社, 2010.

    Ministry of Housing and Urban-Rural Development of the People's Republic of China. Code for design of concrete structures: GB 50010—2010[S]. Beijing: China Architecture & Building Press, 2010(in Chinese).
    [17]
    British Standards Institution. Eurocode 2: Design of concrete structures—Part 1-1: General rules and rules for buildings: BS EN 1992-1-1[S]. London: British Standards Institution, 2004.
    [18]
    ACI 318 Committee. Building code requirements for structural concrete and commentary: ACI 318M—05[S]. Farmington Hills, MI: American Concrete Institute, 2005.
    [19]
    American Association of State Highway and Transportation Officials. AASHTO LRFD bridge design specification: AASHTO LRFDUS—2004[S]. Washington, D.C.: American Association of State Highway and Transportation Officials, 2005.
    [20]
    东南大学. 混凝土结构(上册)—混凝土结构设计原理[M] 北京: 中国建筑工业出版社, 2015: 8-32.

    Southeast University. Concrete structure (the first volume)—Design theory for concrete structure[M]. Beijing: China Architecture & Building Press, 2015: 8-32(in Chinese).
    [21]
    周建庭, 胡天祥, 杨俊, 等. 键槽构造UHPC-NC界面黏结性能试验研究[J]. 材料导报, 2021, 35(16): 16050-16057. DOI: 10.11896/cldb.20070033

    ZHOU Jianting, HU Tianxiang, YANG Jun, et al. Experimental study on adhesion properties of UHPC-NC interface of keyway structure[J]. Materials Reports, 2021, 35(16): 16050-16057(in Chinese). DOI: 10.11896/cldb.20070033
    [22]
    杨冠宇. 不同试验条件下锚索剪切力学行为及失效特征研究[D]. 北京: 中国矿业大学, 2018.

    YANG Guanyu. Study on the behaviors and failure characteristics of cable bolt under various shearing loading experimental environment[D]. Beijing: China University of Mining and Technology, 2018(in Chinese).
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