Author(s)

Minglu Sun ¹

Affiliation(s)

¹ School of Architecture and Civil Engineering, Beijing University of Technology, Beijing, 100124, China

Corresponding Author

Minglu Sun

ABSTRACT

To investigate the shear capacity of inclined cross-sections of FRP-reinforced recycled concrete beams without stirrups, 31 sets of shear test data were collected to analyze the effects of parameters such as longitudinal reinforcement ratio and shear span ratio on shear capacity. By comparing the calculation results of China Code GB 50608-2020 and American Code ACI 440.1R-15, it was found that both significantly underestimate the actual shear capacity and fail to adequately account for shear span ratio, size effect, and pin bolt effects. Based on the concrete formula in China Code, a shear span ratio correction function was introduced to propose a modified shear capacity calculation formula. The mean ratio of modified calculated values to experimental values was 1.27, with a coefficient of variation of 24.08%, indicating good prediction accuracy. Significant deviations in some specimens may be related to size effect and require further investigation.

KEYWORDS

Recycled Concrete Beam; Shear Span Ratio; Shear Capacity; Unbonded Reinforcement; Pin Bolt Effect

CITE THIS PAPER

Minglu Sun. Calculation Method for Shear Capacity of Diagonal Cross-section of Reinforced Concrete Beam with Unreinforced FRP Strips. Journal of Civil Engineering and Urban Planning (2026). Vol. 8, No.1, 171-178. DOI: http://dx.doi.org/10.23977/jceup.2026.080116.

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