基于配载划分的穿梭式立体货架抗震性能研究

Seismic performance of shuttle stereo shelf based on load distribution

针对现有立体仓库存在由于货物分布不均而导致的货架失稳问题,从货物分布的角度对穿梭式立体货架的抗震性能进行了研究。制定了不同的货载占比,研究了货架偏心与重心变化;运用有限元理论分析了不同货载工况下货架的模态振型规律,并施加了两个方向的地震激励,研究了货架在不同货载下的地震响应;通过增加拉杆和钢结构,并用伪静力振动实验法对比了顶部拉杆、Z向拉杆和侧围钢架3种不同抗震性能增强方案。研究结果表明:入库方向货架变形与沿巷道方向堆放货品的货架最大偏心有关,纵向码货的货品位置比货品重量对货架稳定性影响更大,穿梭式货架立柱顶部变形明显,且入库方向的货架稳定性较敏感;利用侧围钢架可明显改善货架抗震性能。

Aiming at the problem of shelf instability caused by uneven distribution of goods in the existing three-dimensional warehouse, the seismic performance of the shuttle-type three-dimensional shelf was studied from the perspective of cargo distribution. Different cargo load ratios were formulated to study the eccentricity and center of gravity of the shelf.The finite element theory was used to study the mode shape of the shelf under different load conditions and the earthquake was applied in two directions to study the seismic response of shelves under different loads.By adding the tie rod and steel structure, and using the pseudo-static vibration experiment method, three different seismic performance enhancement schemes of the top tie rod, the Z-direction tie rod and the side wall steel frame were compared. The results indicate that the deformation of the shelf in the storage direction is related to the maximum eccentricity of the shelves stacked in the direction of the roadway, and the position of the vertically stacked goods has a greater influence on the shelf stability than the weight of the goods. The top of the shuttle shelf column is obviously deformed, and the shelf stability in the storage direction is sensitive. The side wall steel frame can significantly improve the seismic performance of the shelf.