混凝土强度对钢纤维混凝土断裂韧度的影响

Influence of concrete strength on fracture energy of steel fiber reinforced concrete

通过混凝土和钢纤维混凝土三点弯曲切口梁试验,探讨了混凝土强度等级和钢纤维对混凝土断裂韧度的影响。试验结果表明,随着混凝土强度的提高,混凝土和钢纤维混凝土的断裂韧度逐渐增加。根据对试验结果的统计分析,建立了混凝土和钢纤维混凝土断裂韧度的计算公式。

Through the three-point bending test on the specimens of steel fiber reinforced concrete and plain concrete, the effect of the concrete strength and the steel fiber upon the fracture toughness（KIC ）was studied.The results show that the fracture toughness linearly increases with the enhancement of the concrete strength.According to statistical analysis,the formulas about the fracture toughness of steel fiber reinforced concrete and plain concrete were established respectively.