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

被引：1

作者：

Cai, Bin ^{[1
]}

Li, Kaiyi ^{[1
]}

Fu, Feng ^{[2
,3
]}

机构：

[1] Jilin Jianzhu Univ, Sch Civil Engn, Changchun, Jilin, Peoples R China

[2] City Univ London, Sch Sci & Technol, Dept Engn, London, England

[3] City Univ London, Sch Sci & Technol, Dept Engn, London EC1V 0HB, England

来源：

PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-STRUCTURES AND BUILDINGS | 2023年 / 177卷 / 08期

基金：

中国国家自然科学基金;

关键词：

steel fibre reinforced coal gangue concrete beam; moment-curvature; crack width; cracking moment; ultimate moment; MECHANICAL-PROPERTIES; STEEL FIBER; BEHAVIOR; STRENGTH; CEMENT; WASTE; GLASS;

D O I：

10.1680/jstbu.22.00066

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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.

引用

页码：728 / 748

页数：21

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