Mechanical behaviour of concrete with amorphous metallic and steel fibres
Mechanical behaviour of concrete with amorphous metallic and steel fibres
复制标题
DOI：
10.1680/jmacr.15.00493
复制
发表时间：
2016-12-01
影响因子：
2.7
通讯作者：
Yoon, Young-Soo
中科院分区：
文献类型：
--
作者：
Lee, Joo-Ha;Yoo, Doo-Yeol;Yoon, Young-Soo
在这项研究中，一些纤维增强混凝土（FRC）的圆筒，梁和狗骨形标本制作和测试在静态荷载条件下。调查的主要变量是纤维类型（非晶金属纤维和钢纤维），水/水泥（w/c）比（0.6和0.45）和纤维体积含量（0-0.75%）。随着较低的水碳比，压缩强度，弹性模量，弯曲强度和拉伸强度增加，而断裂能下降，无论纤维类型或含量。与非晶态金属纤维增强混凝土相比，钩状钢纤维增强混凝土具有更高的弯曲韧性、剩余强度和断裂能，但压缩韧性和应变能力较低。非晶态金属纤维的体积含量对弯曲和拉伸行为有明显的影响-更高的纤维含量导致更高的强度，挠曲能力，韧性和断裂能，因为纤维桥接能力的改善-而它对压缩强度和弹性模量的影响不明显。
In this study, a number of fibre-reinforced concrete (FRC) cylinders, beams and dog-bone-shaped specimens were fabricated and tested under static loading conditions. The primary variables of the investigation were the fibre type (amorphous metallic fibres and steel fibres), water/cement (w/c) ratio (0.6 and 0.45) and fibre volume content (0-0.75%). With a lower w/c ratio, the compressive strength, elastic modulus, flexural strength and tensile strength increased, whereas the fracture energy decreased regardless of the fibre type or content. Compared with FRC with amorphous metallic fibres, FRC with hooked-end steel fibres exhibited much higher flexural toughness, residual strength and fracture energy, but showed lower compressive toughness and strain capacity. The volume content of amorphous metallic fibres had a pronounced effect on the flexural and tensile behaviours - higher fibre contents led to higher strength, deflection capacity, toughness and fracture energy because of the improvement of the fibre bridging capacity - whereas it had an insignificant influence on compressive strength and elastic modulus.