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增强钢纤维效果的控制因素
我们可以根据钢纤维增强机理的各种理论，诸如纤维间距理论，复合材料理论和微观断裂理论，可以确定钢纤维的增强效果主要取决于基体强度(fm)，纤维的长径比，纤维的体积率(钢纤维混凝土中钢纤维所占体积百分数)，纤维与基体间的粘结强度(τ)，以及钢纤维在基体中的分布和取向(η)的影响。当钢纤维混凝土破坏时，大都是纤维被拔出而不是被拉断，因此改善纤维与基体间的粘结强度是改善钢纤维增强效果的主要控制因素之一。
According to various theories of the mechanism of steel fiber reinforcement, such as fiber spacing theory, composite material theory and micro-fracture theory, we can ascertain that the reinforcement effect of steel fiber mainly depends on matrix strength (fm), fiber length-diameter ratio, fiber volume ratio (steel fiber volume percentage in steel fiber reinforced concrete), and fiber. The bond strength (_) between steel fibers and matrix, and the influence of distribution and orientation (_) of steel fibers in matrix. When steel fiber reinforced concrete is destroyed, most of the fibers are pulled out rather than broken. Therefore, improving the bond strength between fibers and matrix is one of the main controlling factors to improve the effect of steel fiber reinforced.
According to various theories of the mechanism of steel fiber reinforcement, such as fiber spacing theory, composite material theory and micro-fracture theory, we can ascertain that the reinforcement effect of steel fiber mainly depends on matrix strength (fm), fiber length-diameter ratio, fiber volume ratio (steel fiber volume percentage in steel fiber reinforced concrete), and fiber. The bond strength (_) between steel fibers and matrix, and the influence of distribution and orientation (_) of steel fibers in matrix. When steel fiber reinforced concrete is destroyed, most of the fibers are pulled out rather than broken. Therefore, improving the bond strength between fibers and matrix is one of the main controlling factors to improve the effect of steel fiber reinforced.
