For the convenience of analyzing influence of fiber orientation and concrete interlayer on mechan-ical properties of layered steel fiber-reinforced concrete(LSFRC),firstly,layered steel fiber-reinforced concrete samples with three kinds of fiber content of 0.5%～1.5%are tested for compressive strength,shear strength and flexural tensile strength experiment respectively.And then,fine models of cubic and prismatic LSFRC samples are established by using finite element to analyze effects of fiber content,fiber orientation and the interlayer between concrete layers.The experimental results show that LSFRC exhibit a maximum increment of 58%in flexural strength range.The numerical analysis indicates that the inter-layer maximum shear stress is reduced by 10.8%in LSFRC prismatic samples,and the deflection at the bottom of prismatic samples is decreased by 17.3%.The study demonstrates that the bonding states be-tween inter-layers have a significant effect on the loading of specimens.The incorporation of steel fibers is the result of a local stress concentration and an integral stress dispersion in the part of samples,whereas the steel fibers restrain the deformation of zone,improving the bending resistance of concrete.
关键词
层布式钢纤维混凝土/力学响应/有限元法
Key words
layered steel fiber reinforced concrete/mechanical response/finite element method
维普
万方数据