赵宪忠, 戴柳丝, 黄兆祺, 任重. 钢货架结构研究现状与关键技术[J]. 工程力学, 2019, 36(8): 1-15. DOI: 10.6052/j.issn.1000-4750.2018.10.ST12
引用本文: 赵宪忠, 戴柳丝, 黄兆祺, 任重. 钢货架结构研究现状与关键技术[J]. 工程力学, 2019, 36(8): 1-15. DOI: 10.6052/j.issn.1000-4750.2018.10.ST12
ZHAO Xian-zhong, DAI Liu-si, HUANG Zhao-qi, REN Chong. REVIEW OF THE RESEARCH ON STEEL STORAGE RACK STRUCTURES[J]. Engineering Mechanics, 2019, 36(8): 1-15. DOI: 10.6052/j.issn.1000-4750.2018.10.ST12
Citation: ZHAO Xian-zhong, DAI Liu-si, HUANG Zhao-qi, REN Chong. REVIEW OF THE RESEARCH ON STEEL STORAGE RACK STRUCTURES[J]. Engineering Mechanics, 2019, 36(8): 1-15. DOI: 10.6052/j.issn.1000-4750.2018.10.ST12

钢货架结构研究现状与关键技术

REVIEW OF THE RESEARCH ON STEEL STORAGE RACK STRUCTURES

  • 摘要: 随着物流和电商行业的飞速发展,钢货架结构从单纯提供货物存储功能的简单机械类产品逐步向高位立体库、库架合一式建筑发展,这对货架结构的安全性提出更高要求。与传统钢框架结构相比,钢货架结构的托盘货载远大于结构自重,竖向荷载活恒比值可达10∶1量级;主要竖向承重构件多采用连续开孔薄壁截面,其性能受到局部屈曲、畸变屈曲、整体屈曲以及各屈曲模式间相互作用的影响;梁柱节点和柱脚节点多为半刚性挂齿式机械连接,表现出强非线性和捏拢滑移滞回特征;竖向支撑体系对整体结构稳定性的影响机制和有效性。另外,在地震作用下,货架结构的破坏模式除了主要承重构件的破坏和整体结构的垮塌外,还存在托盘货载跌落导致的货物、结构破坏和人员伤害。在钢货架结构抗震分析中,托盘货物的滑动和跌落应属于一种极限状态加以考虑,托盘与横梁间的动力摩擦系数将成为评估结构性能的一个重要参数。结合国内外已有研究成果,该文基于钢货架结构的特点,评述了现有的研究方法,综述了各基本结构要素的力学行为、整体结构的稳定性态及抗震性能,探讨了研究中的关键问题。

     

    Abstract: With the rapid growth of logistics industry, steel storage racks are not just industrial products. They are commonly used in high-rise warehouses and clad racks. Therefore, the structural safety of storage racks is of vital importance. Steel storage racks are distinct from traditional moment resisting frames in the following aspects. Firstly, storage racks may carry extremely high live loads with comparatively light weight and reach up to 40 meters in height. Secondly, the uprights have open singly- or non-symmetric cross-sections and are continuously perforated along the length, the behavior of which is significantly influenced by local, distortional, global buckling and their interactions. Thirdly, the mechanical beam-to-upright connections and column bases are commonly utilized for their convenience in assembly and adjustment. Their nonlinear moment-rotation behavior and severely pinching characterization requires comprehensive investigations. Fourthly, the influences of the asymmetry configuration of the bracing system on the stability of the overall rack structure need to be carefully studied. Moreover, as for the aseismic behavior of rack structures, further investigations are required for the hysteretic behavior of beam-to-upright connections, the collapse mechanisms of the overall rack structures, and the sliding behavior between pallets and beams. It should be noted that besides usual local and global collapse mechanisms, the falling of pallets should also be considered as an additional serviceability limit state of rack structures. This paper reviews researches on the behavior of steel storage racks. A brief introduction of rack structures is provided, as well as the main research methodologies. The main research results on the static and dynamic behavior are then presented respectively. Finally, the key issues in studies of steel storage racks and the related research topics are proposed.

     

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