Techno Press


Steel and Composite Structures   Volume 22, Number 2, October10 2016, pages 353-368
DOI: http://dx.doi.org/10.12989/scs.2016.22.2.353
 
Fatigue behavior of stud shear connectors in steel and recycled tyre rubber-filled concrete composite beams
Qing-Hua Han, Yi-Hong Wang, Jie Xu and Ying Xing

 
Abstract     [Full Text]
    This paper extends our recent work on the fatigue behavior of stud shear connectors in steel and recycled tyre rubber-filled concrete (RRFC) composite beams. A series of 16 fatigue push-out tests were conducted using a hydraulic servo testing machine. Three different recycled tyre rubber contents of concrete, 0%, 5% and 10%, were adopted as main variable parameters. Stress amplitudes and the diameters of studs were also taken into consideration in the tests. The results show that the fatigue lives of studs in 5% and 10% RRFC were 1.6 and 2.0 times greater of those in normal concrete, respectively. At the same time, the ultimate residual slips' values of stud increased in RRFC to highlight its better ductility. The average ultimate residual slip value of the studs was found to be equal to a quarter of studs' diameter. It had also been proved that stress amplitude was inversely proportional to the fatigue life of studs. Moreover, the fatigue lives of studs with large diameter were slightly shorter than those of smaller ones and using larger ones had the risk of tearing off the base metal. Finally, the comparison between test results and three national codes was discussed.
 
Key Words
    recycled tyre rubber-filled concrete; rubber content; push-out test; S-N curve; stress amplitude; fatigue lives; residual slip
 
Address
(1) Qing-Hua Han, Yi-Hong Wang, Jie Xu, Ying Xing:
School of Civil Engineering, Tianjin University, Tianjin 300072, China;
(2) Qing-Hua Han, Jie Xu:
Key Laboratory of Coast Civil Structure and Safety of Ministry of Education, Tianjin University, Tianjin 300072, China.
 

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