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Experimental and Numerical Study on the Mechanical Performance of Ultra-High-Performance Concrete T-Section Beams

Author

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  • Jianluan Li

    (College of Civil Engineering, Hefei University of Technology, Hefei 230009, China
    Anhui Transport Consulting and Design Institute Co., Ltd., Hefei 230088, China)

  • Yonggao Yin

    (College of Civil Engineering, Hefei University of Technology, Hefei 230009, China)

  • Jing Yan

    (College of Civil Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract

Aiming to investigate the mechanical performance of UHPC T-section beams, five specimens are fabricated and tested, considering the variable steel fiber volume fraction (SFVF). The code of the Association Francaise de Génie Civil (AFGC) is evaluated by test data. Additionally, based on Abaqus (2020), refined finite element analysis (FEA) models of specimens are established and validated by experimental data. Moreover, the parametric sensitivity analysis is carried out, which aims to further investigate the effect of shear span ratio, longitude reinforcement ratio, and stirrup ratio on the bending-shear behavior of T-section beams. The test results indicated that the ultimate load of the specimen improves with the increase of SFVF, and the use of steel fibers can greatly improve the shear capacity instead of the bending capacity. Furthermore, SFVF can change the failure mode; the specimens fail in shear failure when SFVF < 2%, while they fail in bending failure when SFVF ≥ 2%. From the evaluation of codes, the AFGC code is conservative in the prediction of ultimate capacity, which can guide the design of UHPC structures well. Additionally, from the parametric analysis of FEM, the failure mode transformed from shear failure to bending failure as the shear span ratio increased, particularly in specimens with SFVF ≥ 2.5%. Moreover, the stirrup ratio ρ sv has a significant effect on the shear performance of structures with SFVF ≤ 1%, while it has less effect with SFVF ≥ 2%.

Suggested Citation

  • Jianluan Li & Yonggao Yin & Jing Yan, 2023. "Experimental and Numerical Study on the Mechanical Performance of Ultra-High-Performance Concrete T-Section Beams," Sustainability, MDPI, vol. 15(12), pages 1-18, June.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:12:p:9849-:d:1175505
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    References listed on IDEAS

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    1. Memduh Karalar & Yasin Onuralp Özkılıç & Ahmed Farouk Deifalla & Ceyhun Aksoylu & Musa Hakan Arslan & Mahmood Ahmad & Mohanad Muayad Sabri Sabri, 2022. "Improvement in Bending Performance of Reinforced Concrete Beams Produced with Waste Lathe Scraps," Sustainability, MDPI, vol. 14(19), pages 1-17, October.
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