Steel and Composite Structures

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Static and fatigue performance of stud shear connector in steel fiber reinforced concrete

  • Xu, Chen (Department of Bridge Engineering, College of Civil Engineering, Tongji University) ;
  • Su, Qingtian (Department of Bridge Engineering, College of Civil Engineering, Tongji University) ;
  • Masuya, Hiroshi (Department of Environmental Design, Institute of Science and Engineering, Kanazawa University)
  • Received : 2017.01.10
  • Accepted : 2017.05.24
  • Published : 2017.07.20
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Abstract

The stud is one of the most frequently used shear connectors which are important to the steel-concrete composite action. The static and fatigue behavior of stud in the steel fiber reinforced concrete (SFRC) were particularly concerned in this study through the push-out tests and analysis. It was for the purpose of investigating and explaining a tendency proposed by the current existing researches that the SFRC may ameliorate the shear connector's mechanical performance, and thus contributing to the corresponding design practice. There were 20 test specimens in the tests and 8 models in the analysis. According to the test and analysis results, the SFRC had an obvious effect of restraining the concrete damage and improving the stud static performance when the compressive strength of the host concrete was relatively low. As to the fatigue aspect, the steel fibers in concrete also tended to improve the stud fatigue life, and the favorable tensile performance of SFRC may be the main reason. But such effect was found to vary with the fatigue load range. Moreover, the static and fatigue test results were compared with several design codes. Particularly, the fatigue life estimation of Eurocode 4 appeared to be less conservative than that of AASHTO, and to have higher safety redundancy than that of JSCE hybrid structure guideline.

Keywords

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