摘要
通过对钢纤维混凝土一组典型试验数据的分析,发现按ASTM建议的公式计算钢纤维混凝土的KⅠC,所得结果不能真正反映钢纤维混凝土的断裂特性.为此,从理论上分析了考虑缝端前缘断裂过程区的必要性,并应用双K断裂准则导出了钢纤维混凝土KⅠC的计算公式.
It is found from an analysis of a group of typical experimental data about steel fiber reinforced concrete that the formula for calculation of K_(IC) of steel fiber reinforced concrete, presented by ASTM, is ineffective to reflect the fracture characteristic of the reinforced concrete. Therefore, the necessity for consideration of the precritical crack propagation length was theoretically discussed, and a new formula for calculation of K_(IC) of steel fiber reinforced concrete was derived by use of the double-K fracture criterion.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第4期452-454,共3页
Journal of Hohai University(Natural Sciences)
关键词
钢纤维混凝土
双K断裂准则
裂缝口张开位移
有效长度
断裂韧度
<Keyword>steel fiber reinforced concrete
double-K fracture criterion
crack mouth opening displacement
effective crack length
fracture toughness
