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Capacity of CFRHS X-joints made of double-grade S420 steel

机译：双级S420钢制成的CFRHS X接头的能力

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摘要

This study considers the ultimate capacity of X-joints manufactured from Ruukki double gradernS420MH/S355J2H Cold-Formed Rectangular Hollow Sections (CFRHS). The goal of the investigation was torndefine the validity of the current design rules for the used double grade steel with yield strength level of 420MPa.rnThe main parameters in this study were the geometry of the joints, size of welds, and heat inputs during welding.rnThe X-joints were subjected to axial tensile loading and experimental test were carried out at ?40℃ degrees.rnSome compression loaded tests were also performed at room temperature. The results showed good strength andrndeformation capacities and they did not support in Eurocode suggested reduction factor of 0.9 for the capacityrnof X-joints made of this steel grade. In addition, the few available results did not support the requirement inrnEurocode to increase the throat thickness of a fillet weld for this strength level. Numerical analyses were carriedrnout in order to find proper material models for nonlinear behaviour of the joint. The use of A_(gt) as a limit strainrnvalue in the material model showed good agreement with the experimental results.
机译：本研究考虑了用Ruukki双牌号S420MH / S355J2H冷弯矩形空心型材（CFRHS）制造的X接头的极限承载力。研究的目的是撕毁现行设计规则对屈服强度为420MPa的二手双级钢的有效性的定义。本研究的主要参数是接头的几何形状，焊缝尺寸和焊接过程中的热量输入。 rn对X关节进行轴向拉伸载荷，并在40摄氏度下进行实验测试。rn在室温下也进行了一些压缩载荷试验。结果显示出良好的强度和变形能力，而欧洲规范不支持将这种钢种制成的X形接头的容量降低系数0.9。此外，很少有可用的结果不符合innEurocode要求的为此强度水平增加角焊缝的喉部厚度的要求。进行了数值分析，以便为接头的非线性行为找到合适的材料模型。在材料模型中使用A_（gt）作为极限应变值表明与实验结果吻合良好。

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  • 来源
    《Tubular structures XIV》|2012年|167-176|共10页
  • 会议地点 London(GB)
  • 作者

    T. Bj?rk; H. Saastamoinen;

  • 作者单位

    Lappeenranta University of Technology, Lappeenranta, Finland;

    Lappeenranta University of Technology, Lappeenranta, Finland;

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  • 原文格式 PDF
  • 正文语种 eng
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