TY - JOUR
T1 - Shear connection of reinforcement stiffened cold-formed U-shaped steel and concrete composite beam
AU - Zhao, Yi
AU - Yang, Yuanlong
AU - Xu, Shaoqian
AU - Liu, Jiepeng
AU - Chen, Yohchia Frank
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/9/15
Y1 - 2020/9/15
N2 - This paper discusses the shear connection of a novel configuration of U-shaped steel and concrete composite beam with a reinforcement strengthening system (RCUCB). In the push-out experiment on 11 specimens, the effects of the following influencing factors were investigated: the diameter of inverted U-shaped reinforcement (IUR), the number of IUR, the width of varus flanges, and the details of reinforcement truss (RTR). Based on the test results, two distinctive failure modes were found: ductile slip for the cases with IUR; and sudden fracture at the slab-web interface (neck) for the cases without IUR. According to the failure mechanisms, a more exact calculation method for the longitudinal shear capacity at the neck between concrete slab and beam web is proposed, which results in good agreement with the test results. On average, the concrete neck, IUR, and RTR contribute respectively 53%, 28%, and 19% of the shear capacity. Lastly, a reliable method for determining the degree of shear connection in RCUCB is proposed and verified using the earlier test results.
AB - This paper discusses the shear connection of a novel configuration of U-shaped steel and concrete composite beam with a reinforcement strengthening system (RCUCB). In the push-out experiment on 11 specimens, the effects of the following influencing factors were investigated: the diameter of inverted U-shaped reinforcement (IUR), the number of IUR, the width of varus flanges, and the details of reinforcement truss (RTR). Based on the test results, two distinctive failure modes were found: ductile slip for the cases with IUR; and sudden fracture at the slab-web interface (neck) for the cases without IUR. According to the failure mechanisms, a more exact calculation method for the longitudinal shear capacity at the neck between concrete slab and beam web is proposed, which results in good agreement with the test results. On average, the concrete neck, IUR, and RTR contribute respectively 53%, 28%, and 19% of the shear capacity. Lastly, a reliable method for determining the degree of shear connection in RCUCB is proposed and verified using the earlier test results.
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U2 - 10.1016/j.engstruct.2020.110862
DO - 10.1016/j.engstruct.2020.110862
M3 - Article
AN - SCOPUS:85086569644
SN - 0141-0296
VL - 219
JO - Engineering Structures
JF - Engineering Structures
M1 - 110862
ER -