Experimental Study on the Bending Resistance of the Connection Nodes of Heavy Duty Socket and Plate Buckle Steel Pipe Scaffolding
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摘要: 现今由于大跨度建筑的广泛建造,对于脚手架稳定性要求也越来越高,而此前研究发现承插型盘扣式钢管脚手架连接节点对于脚手架的稳定性起着至关重要的作用。基于此,首先对重型承插型盘扣式钢管脚手架连接节点基于半刚性理论进行有限元建模及分析,将得出的弯矩-转角曲线与已有的重型承插型盘扣式钢管脚手架抗弯试验进行对比,验证了有限元分析的可靠性,建立精细化数值模型,并对影响节点抗弯性能的连接盘厚度、插销材料本构、插销厚度及插入深度4个参数进行分析优化,为后续对节点随机缺陷的研究以及脚手架简化模型的建立奠定基础。
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关键词:
- 重型盘扣式钢管脚手架 /
- 半刚性节点 /
- 有限元分析 /
- 参数化分析
Abstract: Nowadays, due to the extensive construction of long-span buildings, the requirements for the stability of scaffolding are becoming higher and higher. Previous studies have found that the connection nodes of spigot and disk-buckle steel pipe scaffolding play a crucial role in the stability of scaffolding. In this regard, this paper first conducts finite element modeling and analysis of the connection nodes of heavy socket disk-buckle steel pipe scaffold based on the semi-rigid theory, compares the bending moment-angle curve obtained with the existing bending experiments of heavy socket disk-buckle steel pipe scaffold, verifies the reliability of the finite element analysis, establishes a refined numerical model, and analyzes the thickness of the connecting disc that affects the bending performance of the node. Four parameters, namely, the material structure of the latch, the thickness of the latch, and the insertion depth, are analyzed, and a conclusion is drawn, which lays a foundation for the subsequent research on the random defects of the joints and the establishment of the simplified model of the scaffold. -
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