Steel and Composite Structures

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Flexural behavior of partially prefabricated partially encased composite beams

  • Liang, Jiong-feng (College of Civil and Architecture Engineering, East China University of Technology) ;
  • Zhang, Liu-feng (College of Civil Engineering, Xi'an University of Architecture & Technology) ;
  • Yang, Ying-hua (College of Civil Engineering, Xi'an University of Architecture & Technology) ;
  • Wei, Li (College of Civil and Architecture Engineering, Wenzhou University)
  • Received : 2019.07.20
  • Accepted : 2021.02.25
  • Published : 2021.03.25
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Abstract

An innovative partially precast partially encased composite beam (PPECB) is put forward based on the existing research. In order to study the flexural performance of the new composite beam which has precast part and cast-in-place part, six prefabricated specimens and one cast-in-place specimen are designed with considering the influence of the production method, the steel flange thickness, the concrete strength grade and the stirrup process on the behavior of the composite beam. Through four points loading and test data collection and analysis, the behavior of partially prefabricated specimen is similar to that of cast-in-place specimen, and the casting method, the thickness of the steel flange, the concrete strength grade and the stirrup process have different influence on the crack, yield and peak load bearing capacity of the component. Finally, the calculation theory of plastic bending of partially precast partially encased concrete composite beams is given. The calculation results are in good agreement with the experimental results, which can be used for practical engineering theory guidance. This paper can provide reference value for further research and engineering application.

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