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Influence of loading direction on X-HVB shear connectors in partially composite steel–concrete beams exposed to fire

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Abstract

The behavior of shear connectors plays an important part in sustaining the required strength of a composite beam. Many types of shear connectors are available and used in the construction industry according to their use. X-HVB shear connectors are an appropriate replacement for conventional shear stud connectors in terms of being environmentally friendly and suitable for use in cold- or hot-rolled profiles or rehabilitation items. They can be installed with simple and safe equipment. The connectors have been tested under different types of loading at ambient temperature; however, the behavior of these connectors during the fire has not been studied. From this research, design limitations are presented to investigate the strength of such types of shear connectors under fire, which are newly used in the composite steel–concrete structure. The main parameters considered in this paper are the effect of exposure to fire, the direction of the profiled steel sheet (parallel or transverse (to the length of the beam), the degree of composite action, and the orientation of the shear connector (backward or forward) to the shear force direction. Eight pushout specimens were prepared to examine the shear strength, ductility and stiffness. According to the results, the shear connector strength was reduced under fire exposure by about 38% and 42% for specimens with parallel and transverse profile steel decks, respectively. The forward orientation of the shear connector relative to the shear force direction exhibits greater fire resistance when compared with that of the backward orientation under fire exposure conditions. It is also shown that the ductility of the shear connector changes with the direction of profiled sheeting (parallel or transverse) to the steel beam.

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No funding was received to assist with the preparation of this manuscript.

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Authors and Affiliations

  1. College of Engineering, University of Babylon (UoB), PO box 247, Hilla, Iraq

    Mays A. Hamad & Haitham H. Muteb

  2. Building and Construction Techniques Engineering Department, Al-Mustaqbal University, Hillah, Babil, 51001, Iraq

    Mays A. Hamad

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  1. Mays A. Hamad
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  2. Haitham H. Muteb
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Mays A. Hamad wrote the main manuscript text and prepared all figures and tables in the manuscript. Haitham H. Muteb reviewed and modified the manuscript.

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Correspondence to Mays A. Hamad.

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Hamad, M.A., Muteb, H.H. Influence of loading direction on X-HVB shear connectors in partially composite steel–concrete beams exposed to fire. Innov. Infrastruct. Solut. 8, 234 (2023). https://doi.org/10.1007/s41062-023-01206-6

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