| 185 | 1 | 205 |
| 下载次数 | 被引频次 | 阅读次数 |
为考察栓钉界面、竖钢板界面对于预制装配抗剪栓钉（PCSS）剪力键抗剪性能的影响，进行了栓钉、竖钢板与混凝土全粘结（F），只有栓钉与混凝土粘结（H），栓钉、竖钢板与混凝土均无粘结（N）的剪力键推出实验研究，并建立了有限元模型，揭示了界面工作机理。实验结果表明：N、H、F型试件承载力和抗剪刚度依次增大，其中栓钉与混凝土间的粘结效应对剪力键抗剪承载力贡献了7.9%，对抗剪刚度贡献了10%；竖钢板与混凝土间的粘结效应对剪力键的抗剪承载力贡献了5.6%，对抗剪刚度贡献约50%。其中，竖钢板与混凝土间的粘结作用对剪力键的抗剪刚度和延性均影响较大。通过有限元Abaqus软件进行模拟分析，考虑零厚度内聚力单元模拟竖钢板与混凝土之间的界面接触，对比弹塑性阶段无粘结效应的界面横向应变，得出PCSS剪力键竖钢板与混凝土间存在约束效应，并且竖钢板与混凝土间的粘结作用能够强化这种约束效应。在计算其抗剪刚度和承载力时，需考虑这种约束效应。
Abstract：In order to investigate the influence of stud interface and vertical steel plate interface on the shear performance of prefabricated composite shear studs(PCSS), the push-out experiment of stud, vertical steel plate and concrete fully bonded(F), only stud and concrete bonded(H), and stud, vertical steel plate and concrete unbonded(N) were carried out, and the finite element model was established, revealing the working mechanism of the interface. The experimental results show that: the bearing capacity and shear stiffness of N, H and F specimens increase in order, where the bond effect between the studs and concrete contributes 7.9% to the shear bearing capacity and 10% to the shear stiffness of the shear connectors, and the bond effect between the vertical steel plate and concrete contributes 5.6% to the shear bearing capacity and about 50% to the shear stiffness of the shear connectors. Among them, the bond effect between the vertical steel plate and the concrete has a greater influence on both the shear stiffness and ductility of the shear connectors. The finite element Abaqus software is used to simulate and analyze the interface contact between the vertical steel plate and concrete by considering the zero-thickness cohesion element. Compared with the interface transverse strain of unbonded effect in the elastic-plastic stage, it is concluded that there is a constraint effect between the PCSS shear connectors vertical steel plate and concrete, and the bonding effect between the vertical steel plate and concrete can strengthen this constraint effect. This constraint effect should be considered when calculating its shear stiffness and bearing capacity.
[1]李成君，周志祥，黄雅意，等.装配式组合梁剪力钉抗剪承载力研究[J].中国公路学报，2017, 30(3):264–270.
[2] GAO Y M, LI C J, LIU D, et al. Shear-slip behaviour of prefabricated composite shear stud connectors in composite bridges[J]. Engineering Structures, 2021, 240(3):1–16.
[3]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.
[4]丁发兴，倪鸣，龚永智，等.栓钉剪力连接件滑移性能试验研究及受剪承载力计算[J].建筑结构学报，2014, 35(9):98–106.
[5] TAHIR A K, SHALLAL M A. Load-slip relationship of multi-type shear connectors based on push-out test[J]. Journal of Physics:Conference Series, 2021, 1895(1):012065.
[6] XU C, SUGIURA K, WU C, et al. Parametrical static analysis on group studs with typical push-out tests[J]. Journal of Constructional Steel Research, 2012, 72(3):84–96.
[7] NGUYEN H T, KIM S E. Finite element modeling of push-out tests for large stud shear connectors[J]. Journal of Constructional Steel Research, 2009, 65(10/11):1909–1920.
[8]苏庆田，薛智波，李晨翔，等.组合梁钢与混凝土界面连接效应的精细化计算[J].同济大学学报（自然科学版），2016,44(12):1803–1809.
[9]刘界鹏，周保旭，余洁，等.装配整体式钢-混凝土组合梁栓钉抗剪连接件受力性能试验研究[J].建筑结构学报，2017, 38（增刊1）:337–341.
[10]苏小卒，黄长鑫.受栓钉强度控制的钢板-混凝土界面黏结滑移性能试验与本构模型[J].建筑结构学报，2018, 39(3):167–174.
[11] WANG X L, LIU Y Q, LI Y X. Bond behavior and shear transfer of steel section-concrete interface with studs:Testing and modeling[J]. Construction and Building Materials, 2020,264(5):1255–1272.
[12] CEN-European Committee for Standardisation. Eurocode 4:Design of composite steel and concrete structures. Part1-1:General rules and rules for buildings[S]. Brussels, CENEuropean Committee for Standardisation, 2004.
[13] GB50917-2013：钢-混凝土组合桥梁设计规范[S].中华人民共和国住房和城乡建设部, 2013.
[14]蔺钊飞，刘玉擎，贺君.焊钉连接件抗剪刚度计算方法研究[J].工程力学，2014, 31(7):85–90.
[15]苏庆田，杜霄，李晨翔.钢与混凝土界面的基本物理参数测试[J].同济大学学报（自然科学版），2016, 44(4):499–506.
[16] GB50010—2010:混凝土结构设计规范[S].北京：中国建筑工业出版社，2015.
[17] LIN J P, WANG J F, XU R Q. Cohesive zone model based numerical analysis of steel-concrete composite structure push-out tests[J]. Mathematical Problems in Engineering,2014(7):1–12.
[18] LOWES L N, MOEHLE J P, GOVINDJEE S. Concrete-steel bond model for use in finite element modeling of reinforced concrete structures[J]. Aci Structural Journal, 2004, 101(4):501–511.
基本信息:
DOI：10.16791/j.cnki.sjg.2023.05.007
中图分类号:TU741;TU398.9
引用信息:
[1]高燕梅,马飞,叶孝平,等.界面效应对PCSS剪力键滑移性能的影响实验研究[J].实验技术与管理,2023,40(05):42-49.DOI:10.16791/j.cnki.sjg.2023.05.007.
基金信息:
重庆市自然科学基金项目（cstc2020jcyj-msxmX0062）
2023-06-15
2023-06-15
2023-06-15