Journal of South China University of Technology (Natural Science Edition) ›› 2018, Vol. 46 ›› Issue (6): 54-64.doi: 10.3969/j.issn.1000-565X.2018.06.008

• Traffic & Transportation Engineering • Previous Articles     Next Articles

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) 

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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

CLC Number: