华南理工大学学报(自然科学版) ›› 2018, Vol. 46 ›› Issue (6): 54-64.doi: 10.3969/j.issn.1000-565X.2018.06.008

• 交通运输工程 • 上一篇    下一篇

重复荷载作用后栓钉连接件的剩余力学性能

黄侨1 汪炳2 刘小玲3 邹韵1 李文贤1   

  1. 1. 东南大学 交通学院,江苏 南京 211189;
    2. 宁波大学 建筑工程与环境学院,浙江 宁波 315211;
    3. 宁波大学 海运学院,浙江 宁波 315211
  • 收稿日期:2017-08-31 修回日期:2018-04-03 出版日期:2018-06-25 发布日期:2018-05-07
  • 通信作者: 黄侨( 1958-) ,男,博士,教授,主要从事钢 -混凝土组合桥梁的设计理论研究. E-mail:qhuanghit@126.com
  • 作者简介:黄侨( 1958-) ,男,博士,教授,主要从事钢 -混凝土组合桥梁的设计理论研究.
  • 基金资助:
    国家自然科学基金资助项目( 51278119, 51078078) 

Residual Mechanical Properties of Stud Connectors under Cyclic Loading
 

 HUANG Qiao1 WANG Bing2 LIU Xiaoling3 ZOU Yun1 LI Wenxian1   

  1.  1. School of Transportation,Southeast University,Nanjing 211189,Jiangsu,China; 2. Faculty of Architecture,Civil Engineering and Environment,Ningbo University,Ningbo 315211,Zhejiang,China; 3. Faculty of Maritime and Transportation,Ningbo University,Ningbo 315211,Zhejiang,China
  • Received:2017-08-31 Revised:2018-04-03 Online:2018-06-25 Published:2018-05-07
  • Contact: 黄侨( 1958-) ,男,博士,教授,主要从事钢 -混凝土组合桥梁的设计理论研究. E-mail:qhuanghit@126.com
  • About author:黄侨( 1958-) ,男,博士,教授,主要从事钢 -混凝土组合桥梁的设计理论研究.
  • Supported by:
     Supported by the National Natural Science Foundation of China( 51278119, 51078078) 

摘要: 为研究钢 -混凝土组合结构中栓钉连接件在疲劳荷载作用后的力学性能退化规 律,基于标准推出试验方法,对共计11 个栓钉连接件的推出试件进行了三组试验,分别为 推出试件的静载破坏试验、完全疲劳破坏试验以及经历一定疲劳荷载循环次数后的静载 破坏试验. 在得到栓钉推出试件的静力承载力和疲劳寿命的基础上,分析总结了不同疲劳 荷载循环次数后的栓钉推出试件的抗剪承载力、抗剪刚度、延性等力学性能的变化情况, 并建立了考虑力学性能退化的栓钉荷载 -滑移本构模型. 结果表明: ①栓钉连接件在静载 破坏、疲劳破坏以及疲劳后静载破坏下呈现三种不同的截面破坏特征; ②疲劳荷载作用 下,栓钉推出试件的各项剩余力学指标均呈非线性退化,退化趋势显著; ③文中所建立的 栓钉荷载 -滑移本构模型,形式简单,便于应用,且计算值与试验值吻合良好. 

关键词: 钢-混凝土组合结构, 栓钉连接件, 疲劳, 剩余力学性能, 桥梁

Abstract:

For the study of degradation in mechanical properties of stud connectors in steel-concrete composite structure after fatigue loads,a total of 11 specimens of stud connectors were performed in three series based on the standard push-out test method. They are static load test, fatigue test and static test under a certain fatigue loading
cycle number respectively. The static bearing capacity and fatigue life of the stud specimens were obtained. Based on this, the change rules of mechanical properties for push-out specimens such as shear bearing capacity,shear stiffness and ductility were analyzed after different fatigue load cycles. Finally,a loadslip constitutive model for the
studs consideration degradation of mechanical properties was established. The results show that the stud connectors show three different section failure characteristics in static tests,complete fatigue tests and incomplete fatigue tests;
various residual mechanical indexes for the stud specimens show a nonlinear degradation under fatigue loading and the degradation trend is significant; the established stud loadslip constitutive model is simple in form and expedient
to use. The calculated values are quite agreeable to the experimental ones. 

Key words:  steel-concrete composite structure, stud connectors, fatigue, residual mechanical property, bridge

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