Xu Zhijun, Liang Pengfei
Henan Key Laboratory of Grain and Oil Storage Facility & Safety, Henan University of Technology, Zhengzhou, 450001, China.
Sci Rep. 2022 Apr 29;12(1):7069. doi: 10.1038/s41598-022-11305-6.
For the shallow and circular silo (SCS), when the aspect ratio is between 1.0 and 1.5, the lateral pressure especially dynamic pressure may cause destruction if the size of the silo is large. This paper proposed a modified calculation method of lateral pressure on the silo wall of SCS, considering the elasticities of silo wall and storage materials. The availability of shallow silo and deep silo methods, and the modified method were compared with the experiment and simulation. The results show that the Rankine's formula is too conservative for the static lateral pressure, and the results of the modified method and Janssen formula are close to that of the experimental and simulation. For the dynamic lateral pressure calculation, Rankine theory is unsafe for the discharging load. The relative error of the dynamic lateral pressure based on Janssen theory is between 20 and 30%, which is too large. The dynamic lateral pressure calculated by the modified method is in good agreement with that of the experimental and simulation, and the relative error is less than 10%. Therefore, the modified method of lateral pressure formula is reasonable, which can provide guidance for the safety design of silo structure.
对于浅圆仓（SCS），当高径比在1.0至1.5之间时，如果仓体尺寸较大，侧向压力尤其是动压力可能会导致破坏。本文提出了一种考虑仓壁和储存物料弹性的浅圆仓仓壁侧向压力修正计算方法。将浅仓和深仓方法以及修正方法的计算结果与实验和模拟结果进行了比较。结果表明，朗肯公式对于静侧向压力过于保守，修正方法和扬森公式的结果与实验和模拟结果相近。对于动侧向压力计算，朗肯理论对于卸料荷载不安全。基于扬森理论的动侧向压力相对误差在20%至30%之间，过大。修正方法计算的动侧向压力与实验和模拟结果吻合良好，相对误差小于10%。因此，侧向压力公式的修正方法是合理的，可为筒仓结构的安全设计提供指导。
