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Theoretical analysis of the moment-curvature relationship of coal gangue concrete beams

Cai, B., Li, K. & Fu, F. ORCID: 0000-0002-9176-8159 (2023). Theoretical analysis of the moment-curvature relationship of coal gangue concrete beams. Proceedings of the Institution of Civil Engineers - Structures and Buildings, pp. 1-21. doi: 10.1680/jstbu.22.00066


At present, there are only a few studies on the application of coal gangue concrete to structural components. To study the moment-curvature relationship of steel fibre-reinforced coal gangue concrete beams, a simplified calculation method was proposed in this study. The equations were optimised based on current design codes, including theoretical calculations of flexural stiffness, crack width and spacing, cracking moment and ultimate moment. Calculated results were compared with experimental results to verify that the cracking moment and ultimate moment of the beams were slightly lower than those of natural concrete beams. However, the cracking moment, flexural stiffness and ductility of coal gangue concrete beams was increased by incorporating steel fibres. Increasing the rebar ratio also significantly improved the load-carrying capacity but reduced ductility. The calculated values for moment-curvature were close to the experimental values, proving the optimised calculations have a high accuracy and are applicable to predicting the bending behaviour of steel-fibre-reinforced coal gangue concrete beams. This paper provides a theoretical basis for subsequent related research.

Publication Type: Article
Publisher Keywords: Steel fiber reinforced coal gangue concrete beam; Moment-curvature; Crack width; Cracking moment; Ultimate moment
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TH Building construction
Departments: School of Science & Technology > Engineering
SWORD Depositor:
[thumbnail of ICE-2022-0410(9.14)-City deposit.pdf]
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