构建的I形CFS列的结构行为
1Department of Structural Engineering and Geotechnics, Széchenyi István University, Egyetem Tér 1, Győr, 9026, Hungary. hussein.ardalan.burhan@sze.hu.
Scientific reports
|October 28, 2024
概括
用螺丝连接冷成型钢管道可以提高结构柱的强度. 优化螺丝间距,特别是当地的曲波长的一半,显著提高了曲负荷和轴强度,为接提供了经济有效的替代方案.
科学领域:
- 结构工程 结构工程
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
背景情况:
- 冷成型钢 (CFS) 成员提供制造,成本和运输优势.
- 薄壁CFS段面临的曲挑战 (本地,扭曲,全球),减少轴承强度.
- 接是常见的,但成本高且耗时;螺丝连接被探索为一种替代方案.
研究的目的:
- 为了研究螺丝连接在内置CFS柱中的有效性,作为接的替代方案.
- 分析螺丝间距对CFS柱的轴强度和曲行为的影响.
- 根据实验数据和设计标准验证有限元分析 (FEA) 模型.
主要方法:
- 非线性有限元素分析 (FEA) 在由双C通道构成的CFS列上进行.
- 根据现有文献的实验测试结果,对FEA模型进行了验证.
- 通过175次FEA模拟,分析了17个不同的横截面配置文件和12个螺丝间距.
主要成果:
- FEA的结果与实验测试和设计标准 (AISI & AS/NZS) 有很好的一致性,分别有轻微的高估 (3.6%) 和保守 (3.0%).
- 螺丝间距为本地曲半波长的一半,提高了弹性曲负荷 (本地,扭曲,全球) 高达22%,名义轴承强度提高了11%.
- 双车道紧固件显示出更大的改进 (高达46%),但为了经济效率,建议在最佳距离处使用单车道紧固件.
结论:
- 螺丝连接是制造内置CFS柱子的可行和有效方法.
- 优化螺丝间距对于最大限度地提高CFS柱的轴强度和曲阻力至关重要.
- 该研究为设计经济和高性能CFS结构成员提供了有价值的数据.
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