Structural Engineering and Mechanics

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Behavior of steel and concrete composite beams with a newly puzzle shape of crestbond rib shear connector: an experimental study

  • Le, Van Phuoc Nhan (Department of Civil Engineering, Ho Chi Minh City University of Technology) ;
  • Bui, Duc Vinh (Department of Civil Engineering, Ho Chi Minh City University of Technology) ;
  • Chu, Thi Hai Vinh (Faculity of Civil Engineering, MienTrung University of Civil Engineering) ;
  • Kim, In-Tae (Department of Civil Engineering, Pusan National University) ;
  • Ahn, Jin-Hee (Department of Civil Engineering, Gyeongnam National University of Science and Technology) ;
  • Dao, Duy Kien (Department of Civil Engineering, Pusan National University)
  • Received : 2016.06.21
  • Accepted : 2016.10.05
  • Published : 2016.12.25
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Abstract

The connector is the most important part of a composite beam and promotes a composite action between a steel beam and concrete slab. This paper presents the experiment results for three large-scale beams with a newly puzzle shape of crestbond. The behavior of this connector in a composite beam was investigated, and the results were correlated with those obtained from push-out-test specimens. Four-point-bending load testing was carried out on steel-concrete composite beam models to consider the effects of the concrete strength, number of transverse rebars in the crestbond, and width of the concrete slab. Then, the deflection, ultimate load, and strains of the concrete, steel beam, and crestbond; the relative slip between the steel beam and the concrete slab at the end of the beams; and the failure mechanism were observed. The results showed that the general behavior of a steel-concrete composite beam using the newly puzzle shape of crestbond shear connectors was similar to that of a steel-concrete composite beam using conventional shear connectors. These newly puzzle shape of crestbond shear connectors can be used as shear connectors, and should be considered for application in composite bridges, which have a large number of steel beams.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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