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Flexural behavior of steel-concrete ultra-shallow floor beams (USFBs) with precast hollow-core slab

Pereira Júnior, S. E., Ferreira, F. P. V., Tsavdaridis, K. D. ORCID: 0000-0001-8349-3979 & De Nardin, S. (2023). Flexural behavior of steel-concrete ultra-shallow floor beams (USFBs) with precast hollow-core slab. Engineering Structures, 278, article number 115524. doi: 10.1016/j.engstruct.2022.115524


This paper aims to predict the flexural behavior of steel-concrete composite ultra-shallow floor beams (USFBs) with precast hollow-core slab (PCHCS). A finite element model based on tests is developed. A parametric study is conducted, and the influence of the geometric parameters is discussed. The finite element results were compared with stress block analysis.
It was concluded that the modeling with two symmetry planes offered better computational cost, and the flexural behavior of steel concrete USFBs was sensitive to dilation angles. From the parametric study, the models without steel tie bar through the web openings showed lower bearing capacity. The variation of the reinforcement ratio of the concrete topping contributed to the cracking control. The plastic neutral axis position was measured, considering the mid-span vertical displacement at 10 mm, 50 mm and 100 mm. From the stress distribution it was observed that to define the resisting moment, the P.N.A. closest to the top tee can be considered. The theoretical model underestimated the resistance of SFBs with PCHCS.

Publication Type: Article
Additional Information: © 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Publisher Keywords: Ultra-shallow floor beams; Steel-concrete composite; Precast hollow-core slab; Finite element method; Design.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Science & Technology > Engineering
SWORD Depositor:
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Text - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

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