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.
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