Research on Shear Property of Special Shear Keys in Composite Structures of Double-Layer Plate Truss
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摘要:
为研究双层板桁组合结构中特殊剪力键的抗剪力学性能，通过推出试验探讨混凝土强度和横向带孔加劲肋的孔径对特殊剪力键抗剪性能的影响，对精细化数值模拟分析进行验证，揭示了试件破坏形态和特殊剪力键协同工作机理；基于数值模拟进行参数化分析，提出适用特殊剪力键的抗剪承载力计算公式. 结果表明：双层板桁组合结构由横向带孔加劲肋和栓钉承担剪力，混凝土强度增大，剪力键抗剪承载力逐渐提高；混凝土强度从C30提高至C50，剪力键的抗剪承载力从341.16 kN增至448.09 kN，提高了31.34%；剪力键在孔径为25 × 20 mm的延性为2.06 mm，比无孔径的提高了89.0%，且混凝土强度越大对剪力键延性的影响越大；栓钉根部应力首先到达屈服强度，随即横向带孔加劲肋到达屈服强度；栓钉直径、栓钉极限抗拉强度、混凝土强度以及横向带孔加劲肋的厚度等参数影响特殊剪力键的抗剪承载力，基于参数分析提出适用于特殊剪力键抗剪承载力计算公式，其预测结果与有限元结果吻合度良好，为工程设计提供参考依据.
Abstract:To study the shear mechanical properties of special shear keys in composite structures of a double-layer plate truss, the influence of concrete strength and the hole diameter of transverse perforated stiffening ribs on the shear property of special shear keys was explored through push-out tests. The refined numerical simulation analysis was verified, revealing the failure mode of specimens and the collaborative working mechanism of special shear keys. Based on numerical simulation for parameter analysis, a calculation formula for shear bearing capacity suitable for special shear keys was proposed. The results show that the composite structure of a double-layer plate truss bears the shear force by the transverse perforated stiffening ribs and studs. As the concrete strength increases, the shear bearing capacity of the shear keys gradually improves. The concrete strength increases from C30 to C50, and the shear bearing capacity of the shear key rises from 341.16 kN to 448.09 kN, an increase of 31.34%. The ductility of the shear key with a hole diameter of 25 × 20 mm is 2.06 mm, which is 89.0% higher than that without a hole. Moreover, the greater strength of the concrete leads to a greater influence on the ductility of the shear key. The stress at the root of the stud first reaches the yield strength, and then the transverse perforated stiffening rib reaches the yield strength. Parameters, such as the diameter of the stud, the ultimate tensile strength of the stud, the strength of the concrete, and the thickness of the transverse perforated stiffening rib, affect the shear bearing capacity of the special shear key. Based on the parameter analysis, a calculation formula suitable for the shear bearing capacity of the special shear key is proposed. The prediction results are in good agreement with the finite element results, providing a reference basis for engineering design.
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图 7 试验与数值模拟荷载-滑移曲线
Figure 7. Comparison of load–slip curves between test and numerical simulation
图 10 不同参数对连接键抗剪性能的影响
Figure 10. Influence of different parameters on shear property of connection keys
表 1 试件参数
Table 1. Specimen parameters
编号 混凝土等级 横向带孔加劲肋
孔径/mmSSC01 C30 20 × 25 SSC02 15 × 20 SSC03 SSC04 C40 20 × 25 SSC05 15 × 20 SSC06 SSC07 C50 20 × 25 SSC08 15 × 20 SSC09 
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表 2 推出试验结果
Table 2. Push-out test results
编号 极限承载力/kN 对应的滑移量/mm SSC01 341.16 1.07 SSC02 339.95 0.98 SSC03 337.40 0.93 SSC04 390.50 1.36 SSC05 389.18 1.21 SSC06 390.44 1.11 SSC07 448.09 2.06 SSC08 447.28 1.66 SSC09 444.85 1.09
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表 3 推出试验与数值模拟结果对比
Table 3. Comparison of push-out test and numerical simulation results
试件编号 试验值/kN 模拟值/kN 误差/% SSC01 341.06 321.41 5.76 SSC02 339.95 333.38 1.93 SSC03 337.40 338.58 −0.35 SSC04 390.50 385.48 1.29 SSC05 389.18 377.73 2.94 SSC06 390.44 379.85 2.71 SSC07 448.09 431.52 3.70 SSC08 447.26 420.62 5.96 SSC09 444.85 422.67 4.99 注：$ \text{误差}=\frac{\left| \text{试验值}-\text{模拟值}\right| }{\text{试验值}}\times 100{\text{%}} $.
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[1] 晏班夫, 刘千, 王凯, 等. 带钢底板UHPC梁抗剪承载力计算方法[J]. 交通运输工程学报, 2024, 24(3): 82-93.Yan Banfu, Liu Qian, Wang Kai, et al. Shear bearing capacity calculation method for UHPC beams with steel bottom plate[J]. Journal of Traffic and Transportation Engineering, 2024, 24(3): 82-93. [2] 周敏, 肖靖林, 杨腾宇, 等. 带开孔板剪力键的钢-UHPC组合板受弯性能试验研究及数值模拟[J]. 工程力学, 2022, 39(7): 19-29.Zhou Min, Xiao Jinglin, Yang Tengyu, et al. Experimental and numerical investigations on the flexural behavior of steel-UHPC composite slabs with perfobond rib shear connectors[J]. Engineering Mechanics, 2022, 39(7): 19-29. [3] Qin S Q, Yu L H, Zhang J B, et al. Fatigue assessment of steel-UHPC composite deck with a thin polymer overlay in a long-span suspension bridge under static and random traffic loads[J]. International Journal of Fatigue, 2023, 168: 107409. doi: 10.1016/j.ijfatigue.2022.107409 [4] Liu J P, Lai Z C, Chen B C, et al. Experimental behavior and analysis of steel-laminated concrete (RC and UHPC) composite girders[J]. Engineering Structures, 2020, 225: 111240. doi: 10.1016/j.engstruct.2020.111240 [5] Zhang Y J, Yang Z C, Xie T Y, et al. Flexural behaviour and cost effectiveness of layered UHPC-NC composite beams[J]. Engineering Structures, 2022, 273: 115060. doi: 10.1016/j.engstruct.2022.115060 [6] 张连振, 宋谋, 李玉生, 等. 组合桥面板切应力分布规律及横向剪力钉布置[J]. 浙江大学学报(工学版), 2024, 58(8): 1636-1646.Zhang Lianzhen, Song Mou, Li Yusheng, et al. Distribution law of shear stress of composite bridge deck and arrangement of transverse shear stud[J]. Journal of Zhejiang University (Engineering Science), 2024, 58(8): 1636-1646. [7] 裴必达, 朱星畅, 李传习, 等. 钢-NC-UHPC组合桥面板抗负弯性能试验研究[J]. 土木工程学报, 2025, 58(5): 41-53.Pei Bida, Zhu Xingchang, Li Chuanxi, et al. Experimental study on negative bending resistance of steel-NC-UHPC composite bridge deck[J]. China Civil Engineering Journal, 2025, 58(5): 41-53. [8] 查上, 邓文琴, 刘朵, 等. 波形钢腹板工字钢-UHPC组合梁抗弯性能试验研究[J/OL]. 工程力学, 1-12[2026-01-13]. https: //link.cnki.net/urlid/11.2595.O3.20240304.1241.008. [9] 张协力, 吴冲, 苏庆田. 带开孔板连接件的压型钢板-混凝土组合桥面板疲劳性能试验研究[J]. 同济大学学报(自然科学版), 2023, 51(9): 1395-1406.Zhang Xieli, Wu Chong, Su Qingtian. Experimental study of the fatigue behavior of profiled steel sheeting-concrete composite bridge decks with perfobond connectors[J]. Journal of Tongji University (Natural Science), 2023, 51(9): 1395-1406. [10] 邓宗才, 黄松, 薛会青. 钢-UHPC轻型组合结构短栓钉抗剪性能试验研究[J]. 天津大学学报(自然科学与工程技术版), 2024, 57(1): 42-52.Deng Zongcai, Huang Song, Xue Huiqing. Experimental study on shear behavior of short studs in steel-UHPC light composite structure[J]. Journal of Tianjin University (Science and Technology), 2024, 57(1): 42-52. [11] 阳霞, 何俊杰, 户东阳, 等. 波形钢-UHPC组合桥面板中栓钉-PBL连接件抗剪性能数值模拟研究[J]. 铁道科学与工程学报, 2024, 21(2): 697-708.Yang Xia, He Junjie, Hu Dongyang, et al. Numerical study on shear performance of stud-PBL shear connector in corrugated steel plate-UHPC layer composite deck[J]. Journal of Railway Science and Engineering, 2024, 21(2): 697-708. [12] 曾丹, 刘扬, 曹磊. 钢-UHPC组合结构新型剪力件的抗剪性能[J]. 浙江大学学报(工学版), 2021, 55(9): 1714-1724, 1771.Zeng Dan, Liu Yang, Cao Lei. Shear performance of innovative shear connectors in steel-UHPC composite structure[J]. Journal of Zhejiang University (Engineering Science), 2021, 55(9): 1714-1724, 1771. [13] 马亚飞, 周彪, 王磊, 等. 承压型组合剪力键剪切性能试验与承载力计算[J]. 工程力学, 2023, 40(11): 120-129.Ma Yafei, Zhou Biao, Wang Lei, et al. Shear performance test and bearing capacity calculation of compressive composite shear connector[J]. Engineering Mechanics, 2023, 40(11): 120-129. [14] Shao X D, Yi D T, Huang Z Y, et al. Basic performance of the composite deck system composed of orthotropic steel deck and ultrathin RPC layer[J]. Journal of Bridge Engineering, 2013, 18(5): 417-428. doi: 10.1061/(ASCE)BE.1943-5592.0000348 [15] Dieng L, Marchand P, Gomes F, et al. Use of UHPFRC overlay to reduce stresses in orthotropic steel decks[J]. Journal of Constructional Steel Research, 2013, 89: 30-41. doi: 10.1016/j.jcsr.2013.06.006 [16] 戚菁菁, 吴记东, 蒋丽忠, 等. 带约束构造的栓钉连接件组合板界面抗剪性能试验研究[J]. 铁道科学与工程学报, 2023, 20(7): 2629-2642.Qi Jingjing, Wu Jidong, Jiang Lizhong, et al. Interface shear behavior of stud shear connectors composite plate with constrained measure[J]. Journal of Railway Science and Engineering, 2023, 20(7): 2629-2642. [17] 王宁, 侯和涛, 李海生, 等. 改进的新型全装配式组合梁抗剪连接件试验研究[J]. 工程力学, 2021, 38(1): 89-99.Wang Ning, Hou Hetao, Li Haisheng, et al. Experimental study on improved new fully-assembled composite bear shear connectors[J]. Engineering Mechanics, 2021, 38(1): 89-99. [18] 韩庆华, 高天翼, 王中兴. 铝-木组合抗剪连接件试验研究与数值分析[J/OL]. 土木工程学报, 2025-03-05. https://doi.org/10.15951/j.tmgcxb.24120975. [19] 袁辉辉, 黄珍珍, 吴庆雄, 等. 大跨混合连续箱梁桥钢混结合段传力机理试验与分析[J]. 湖南大学学报(自然科学版), 2023, 50(7): 44-56.Yuan Huihui, Huang Zhenzhen, Wu Qingxiong, et al. Testing and analysis on force transmission mechanism of steel-concrete joint of large-span hybrid continuous girder bridge[J]. Journal of Hunan University (Natural Sciences), 2023, 50(7): 44-56. [20] 马驰, 何家源, 陈天地, 等. 钢-混组合梁异位栓钉剪力键抗剪性能研究[J/OL]. 铁道科学与工程学报, 2025-12-17. https://doi.org/10.19713/j.cnki.43-1423/u.T20251529. [21] Wang S L, Ke Z T, Gao Y, et al. Long-term in situ performance investigation of orthotropic steel bridge deck strengthened by SPS and RPC solutions[J]. Journal of Bridge Engineering, 2019, 24(6): 04019054. doi: 10.1061/(ASCE)BE.1943-5592.0001421 [22] Xiao J L, Zhou M, Nie J G, et al. Flexural behavior of steel-UHPC composite slabs with perfobond rib shear connectors[J]. Engineering Structures, 2021, 245: 112912. doi: 10.1016/j.engstruct.2021.112912 [23] Luo J, Shao X D, Cao J H, et al. Transverse bending behavior of the steel-UHPC lightweight composite deck: Orthogonal test and analysis[J]. Journal of Constructional Steel Research, 2019, 162: 105708. doi: 10.1016/j.jcsr.2019.105708 [24] 梁桓玮, 许春荣, 林昱, 等. 带肋直钩钢筋剪力键剪切与拔出性能研究[J/OL]. 西南交通大学学报, 2024-07-15. https://link.cnki.net/urlid/51.1277.U.20240711.1759.006. [25] 刘益铭, 张清华, 卜一之. ECC桥面板中栓钉抗剪性能试验研究与数值分析[J]. 西南交通大学学报, 2025, 60(1): 35-44.Liu Yiming, Zhang Qinghua, Bu Yizhi. Experimental study and numerical analysis of shear behavior of studs embedded in engineered cementitious composite bridge decks[J]. Journal of Southwest Jiaotong University, 2025, 60(1): 35-44. [26] GB 50917—2013: 钢-混凝土组合桥梁设计规范[S]. -
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