PSI - Issue 66

Bineet Kumar et al. / Procedia Structural Integrity 66 (2024) 337–343 Author name / Structural Integrity Procedia 00 (2025) 000–000

343

7

6. Conclusion The present study, represent the fracture behaviour of UHPFRC beam specimen under flexural load condition. Moreover, a material model has been proposed by considering the specimen size, fibre percentage and its orientation to precisely demonstrate the crack opening under flexural loading. These are the following key points.

 Model considers the stress-strain and stress crack opening approach together  Increase in size causes reduction in the post-peak ductility  Wall effect increases in case of UHPFRC if specimen size increases  Fibre-bridging gets improved with the increase in fibre content in its post-cracking region  Model can also be improved by considering the effect of fibre length

References

Kumar, B., & Ray, S. (2022). A multi-scale based fracture characterization in concrete under fatigue loading using critical energy dissipation. International Journal of Fatigue , 165 , 107165 . Kumar, B., & Ray, S. (2022). Nano-mechanics based crack growth characterization of concrete under fatigue loading. Procedia Structural Integrity , 39 , 222-228. Accornero, F., Rubino, A., & Carpinteri, A. (2022). A fracture mechanics approach to the design of hybrid-reinforced concrete beams. Engineering Fracture Mechanics , 275 , 108821. Kumar, B., Sharma, A., & Ray, S. (2024). An analytical approach for characterizing the fracture behaviour of ultra-high-performance fibre reinforced concrete. Composite Structures , 332 , 117922. Accornero, F., Rubino, A., & Carpinteri, A. (2022). Post-cracking regimes in the flexural behaviour of fibre-reinforced concrete beams. International Journal of Solids and Structures , 248 , 111637. Carpinteri, A., Accornero, F., & Rubino, A. (2023). Scale effects in the post-cracking behaviour of fibre-reinforced concrete beams. International Journal of Fracture , 240 (1), 1-16. Alwan, J. M., Naaman, A. E., & Guerrero, P. (1999). Effect of mechanical clamping on the pull-out response of hooked steel fibers embedded in cementitious matrices. Concrete Science and Engineering , 1 (1), 15-25. Kumar, B., Sharma, A., & Ray, S. (2024). Characterization of crack-bridging and size effect on ultra-high performance fibre reinforced concrete under fatigue loading. International Journal of Fatigue , 182 , 108158. Yao, Y., Silva, F. A., Butler, M., Mechtcherine, V., & Mobasher, B. (2021). Tensile and flexural behavior of ultra-high performance concrete (UHPC) under impact loading. International Journal of Impact Engineering , 153 , 103866. Mobasher, B., Li, A., Yao, Y., Arora, A., & Neithalath, N. (2021). Characterization of toughening mechanisms in UHPC through image correlation and inverse analysis of flexural results. Cement and Concrete Composites , 122 , 104157. de Alencar Monteiro, V. M., Cardoso, D. C. T., de Andrade Silva, F., & Mobasher, B. (2023). Closed-form solutions for flexural fatigue mechanical degradation of steel fiber reinforced concrete beams. Construction and Building Materials , 409 , 134200. El-Helou, R. G., & Graybeal, B. A. (2022). Flexural behavior and design of ultrahigh-performance concrete beams. Journal of Structural Engineering , 148 (4), 04022013.