铁道标准设计2017，Vol.61Issue(8)：84-90,7.DOI:10.13238/j.issn.1004-2954.2017.08.018
钢纤维混凝土力学性能和弯曲韧性研究
Study on Mechanical Properties and Flexural Toughness of Steel Fiber Reinforced Concrete
摘要
Abstract
Four groups ( 15 beams of each ) of steel fiber reinforced concrete incision beam test are carried out with respective content of 25、30、35 and 40 kg/m3 to study the mechanical properties, flexural toughness and optimal content of steel fiber reinforced concrete. Through the analysis of load-deflection curves, it is found that steel fiber can greatly improve the mechanical properties and flexural toughness of concrete after cracking, and the second peak load of cracking is increased by 41. 5% compared with that of the initiative crack load. Then the curve relationship between the energy absorption of unit mass steel fiber and the steel fiber content is obtained though studies on energy absorption and flexural toughness ratio of steel fiber reinforced concrete based on CECS 13 : 2009 standard. Meanwhile, the relationship formula between flexural toughness ratio and steel fiber content is deduced. The results indicate that the optimal steel fiber content which could maximize the flexural toughness is 36 kg/m3 .关键词
钢纤维混凝土/能量吸收/弯曲韧性/荷载挠度曲线/钢纤维掺量Key words
Steel fiber reinforced concrete/Energy absorption/Flexural toughness/Load-deflection curve/Steel fiber content分类
建筑与水利引用本文复制引用
周佳媚,张迁,蒙国往,严启,马敏..钢纤维混凝土力学性能和弯曲韧性研究[J].铁道标准设计,2017,61(8):84-90,7.基金项目
国家自然科学基金项目(51078319) （51078319）
