摘要
在已有断裂准则和试验数据的基础上,运用概率断裂力学与数理统计的基本理论和方法,对岩石与混凝土界面断裂韧度KIc的分布特性进行了研究,并提供了确定KIc试验最少件数的途径。由于威布尔分布或对数正态分布常用来分析寿命分布问题,故优先考虑这两种模型。通过分析和计算得出:岩石与混凝土界面KIc服从对数正态分布,在置信度为0.9,相对偏差不超过5%的条件下,对应的KIc最少试件数估计在13件左右。通过KIc分布特性的研究,将为岩石与混凝土界面概率断裂分析与施工质量控制提供参考依据。
Based on available test data and fracture criterion, by using probability fracture mechanics and mathematical statistical method, the distribution feature of fracture toughness, KIc, on rock-concrete interface was analyzed, and a method of defining the least number of specimens of fracture toughness was provided. Weibull distribution or lognormal distribution is often used to analyze lifetime problem, so the two models were preferentially considered. The analysis shows that the fracture toughness is of lognormal distribution with degree of confidence γ=0.9, relative deviation δ=0.05 and the least number of specimens of 13. The study results can be used in the probability fracture analysis and construction quality control of rock-concrete interface.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第13期2225-2229,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩石
混凝土
断裂韧度
断裂力学
对数正态分布
Concretes
Fracture mechanics
Fracture toughness
Interfaces (materials)
Rocks
Statistical methods
Weibull distribution
