Abstract Present study is aimed to experimentally scrutinize the horizontal distribution of vertical stress underneath granular silos using a high-sensitivity stress sensor mat system. Two granular materials of contrasting particle shape but similar size were utilized to construct granular silos by the alleged local source method. The experimental results indicate that the average vertical stress is agreeable with the value predicted by Janssen's law; however, the distribution of measured vertical stress is found to be non-uniform over the horizontal plane, which is contrary to the assumption of Janssen's law. The distribution non-uniformity is aggravated by a more elongated particle shape. The maximum vertical stresses occur at vicinity of enclosing wall and the vertical stresses lower than the average value appear at the center zone with fluctuations. We proposed an empirical equation with three parameters for characterizing the distribution of vertical stresses normalized by the average value given by the Janssen's law.

中文翻译：

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颗粒筒仓下竖向应力分布试验研究

摘要 目前的研究旨在使用高灵敏度应力传感器垫系统通过实验仔细检查颗粒筒仓下方垂直应力的水平分布。两种颗粒形状不同但尺寸相似的颗粒材料被用来通过所谓的本地来源方法建造颗粒筒仓。实验结果表明，平均竖向应力与詹森定律预测值相符；然而，发现测量的垂直应力分布在水平面上是不均匀的，这与詹森定律的假设相反。更细长的颗粒形状加剧了分布的不均匀性。最大竖向应力出现在围墙附近，低于平均值的竖向应力出现在有波动的中心区域。我们提出了一个具有三个参数的经验方程，用于表征由杨森定律给出的平均值归一化的垂直应力分布。