摘要
采用虚拟裂缝模型结合线弹性断裂力学,分析了掺与不掺纤维活性粉末混凝土(RPC)的断裂特性.结果显示,RPC中掺入钢纤维后,其裂缝的扩展受到限制,而断裂韧度、裂缝尖端亚临界扩展量和裂缝尖端张开位移(CTODc)大大提高,韧性得到显著改善.另外还给出了掺与不掺纤维RPC各断裂参数随纤维掺量的变化规律,分析了其断裂破坏的机理.
The fracture properties of RPC and fibre reinforced RPC are analyzed with Fictitious Crack Model （FCM） in combination with linear-elastic fracture mechanics. The results show that the crack propagation is controlled and the fracture parameters such as fracture toughness, precritical propagation length and CTODc are greatly influenced by fibre volume fraction in RPC. The paper presents the relationship between fracture parameters and the fibre volume fraction, and probes into its fracture failure mechanism.
出处
《建筑材料学报》
EI
CAS
CSCD
2006年第6期654-659,共6页
Journal of Building Materials
关键词
纤维增强
断裂韧度
虚拟裂缝模型
裂缝尖端亚临界扩展量
纤维掺量
fibre strengthen
fracture toughness
Fictitious Crack Model
pre-critical propagation length
fibre volume fraction
