U型试件混凝土冲击寿命的统计分析  

Statistical analysis of impact life for U-shape concrete

作　　者：朱学超[1] 朱涵[1,2] 李浩然[1] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津大学滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《功能材料》2015年第4期4148-4152,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51078261)

摘　　要：采用自行设计的U型混凝土试件,以及自制的落锤冲击实验装置,研究了其抗冲击性能。引入顺序统计量和秩的概念,根据平均秩法的期望估计,计算累积失效概率函数F(N)和生存概率函数R(N)的估计值。利用双参数威布尔(Weibull)分布理论及线性回归理论,分析了在4种不同落锤质量水平下冲击寿命N的分布规律,结果表明,双参数威布尔分布理论可以很好地描述U型试件混凝土冲击寿命N的分布特征。The impact resistance of concrete was measured using self-designed U-shape concrete specimens and a newly designed drop weight impact machine.According to the expectation estimation of mean rank method,the concepts of order statistics and rank are introduced to estimate the values of the function of cumulative failure probability F （N ）and survival probability R （N ）.A series of drop-weight tests were carried out for U-shape concrete specimens with four different quality level of drop hammer,and the distribution regularity of the im-pact life N was analyzed by the theory of double parameters Weibull distribution and linear regression theory. The research results show that the impact life N of U-shape concrete can be modeled well by the theory of Weibull distribution.

关 键 词：混凝土 冲击寿命 顺序统计量 秩 统计分析 威布尔分布 

分 类 号：TU528[建筑科学—建筑技术科学]