Progressive collapse of beam-to-upright subassemblies of steel storage racks under a column removal scenario

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-10-17 DOI:10.1016/j.tws.2024.112575

Liusi Dai , Hao Yao , Shen Yan , Chong Ren

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引用次数: 0

Abstract

This paper presents an experimental investigation into progressive collapse behaviour of steel storage pallet racks under a column removal scenario. The double-half-span substructure is applied in experimental tests. A total of eight substructures are tested, considering two types of beam-to-upright connections, i.e., boltless and bolted connections, commonly used in pallet racks. Different upright profiles and thicknesses, varied beam heights, and the number of tabs are carefully considered in the tests, and their effects on progressive collapse behaviour of pallet racks are thus evaluated. In particular, the influence of pallet loads is carefully evaluated in this paper. Detailed experimental results of all specimens are provided, including the full-range force-displacement curves and the failure modes. The dominated failure modes observed in the tests are the combination of tab crack and bolt bearing failure leading to tearing of beam-end-connector (T+B), the combination of tab crack and bolt bearing failure leading to tearing of upright wall (T+C), and tab crack (T). The test results revealed that the presence of pallet loads greatly influences structural progressive collapse behaviour and thus should be considered in further studies. Moreover, in bolted connections, smaller beam heights and thinner column thicknesses exhibit better resistance against progressive collapse. Whereas in boltless connections, increasing the number of tabs enhances the resistance against progressive collapse. Generally, the bolted connections are proven to have better resistance against progressive collapse than boltless connections and can be used in storage racks to improve structural robustness.

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拆除立柱情况下钢制仓储架从横梁到直立组件的渐进式坍塌

本文介绍了钢制存储托盘货架在支柱拆除情况下的渐进式坍塌行为实验研究。实验测试采用了双半跨下部结构。共测试了八种下部结构，考虑了托盘货架中常用的两种类型的梁与直立架连接，即无螺栓连接和螺栓连接。试验中仔细考虑了不同的直立型材和厚度、不同的横梁高度和插片数量，从而评估了它们对托盘货架渐进式坍塌行为的影响。本文尤其仔细评估了托盘载荷的影响。本文提供了所有试样的详细实验结果，包括全范围力-位移曲线和破坏模式。试验中观察到的主要失效模式有：导致梁端连接件撕裂的凸台裂缝和螺栓支座失效组合（T+B）、导致直立墙撕裂的凸台裂缝和螺栓支座失效组合（T+C）以及凸台裂缝（T）。试验结果表明，托盘荷载的存在会极大地影响结构的渐进式坍塌行为，因此应在进一步的研究中加以考虑。此外，在螺栓连接中，较小的梁高和较薄的柱厚能更好地抵抗渐进式坍塌。而在无螺栓连接中，增加连接片的数量可增强对渐进式坍塌的抵抗力。总体而言，事实证明螺栓连接比无螺栓连接具有更好的抗渐进式坍塌能力，可用于仓储货架以提高结构的坚固性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.