| 钢纤维混凝土影响因素 |
| 添加时间：2020/9/10 16:18:05 浏览次数： |
| 钢纤维混凝土影响因素 Influencing factors of steel fiber reinforced concrete 根据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，以及大量的试验数据的分析，可以确定纤维的增强效果主要取决于基体强度(fm)，纤维的长径比(钢纤维长度l与直径d的比值，即I/d)，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纤维增强效果的主要控制因素之一。 According to various theories of fiber reinforcement mechanism, such as fiber spacing theory, composite material theory and micro fracture theory, as well as the analysis of a large number of experimental data, it can be determined that the reinforcement effect of fiber mainly depends on matrix strength (FM), fiber length diameter ratio (the ratio of steel fiber length L to diameter D, I / D), and fiber volume ratio (the volume of steel fiber in steel fiber reinforced concrete) The results show that the bond strength between the fiber and the matrix (τ), the distribution and orientation of the fiber in the matrix (η). When the steel fiber reinforced concrete is damaged, most of the fibers are pulled out rather than broken. Therefore, improving the bond strength between the fiber and the matrix is one of the main control factors to improve the fiber reinforcement effect. |
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