钢纤维轻骨料混凝土抗冲击性能试验研究与统计分析

对5组钢纤维体积掺量分别为0、0.5%、1.0%、1.5%、2.0%的钢纤维轻骨料混凝土圆饼试件进行了自由落锤冲击试验.试验结果表明:钢纤维的掺入可以提高轻骨料混凝土的抗冲击性能,而且钢纤维的体积掺量越多,提高效果越明显.由于试验结果具有较大的离散性,借助数理统计的方法对试验结果进行分析,研究随着钢纤维掺量的改变,铜纤维轻骨料混凝土抗冲击性能的变化规律.采用对数正态分布和两参数的威布尔分布分别对5组钢纤维轻骨科混凝土的抗冲击性能进行概率分布拟合,拟合结果表明,对数正态分布和两参数威布尔分布均能很好地描述不同掺量钢纤维轻骨科混凝土的抗冲击性能.最后,采用两种分布拟合了钢纤维轻骨料混凝土的抗冲击性能方程.

A clustering algorithm based on fusion and transmission cost for WSN

The impact resistance of steel fiber reinforced lightweight aggregate concrete (SFLWC) was presented in a drop-weight test. In this test, 5 groups of discal specimens with different steel fiber volume fractions including 0, 0.5%, 1.0%, 1.5% and 2.0% were tested. The experimental results indicate that the impact resistance of lightweight aggregate concrete is improved with the increase in fiber volume fraction. As the variation in experimental results, a statistical evaluation was performed to study the influence of impact resistance of SFLWC with different steel fiber volume fractions. Furthermore, the impact resistance was simulated with probability distribution by log-normal distribution and two-parameters Weibull distribution, respectively. And the goodnees-of-fit tests indicate that the log-normal distribution and Weibull distribution both have good fitness to the impact resistance of steel fiber reinforced lightweight aggregate concrete. Lastly, the impact resistance formulas for SFLWC with each steel fiber addition are developed to facilitate the application.