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Stress concentration factors for fatigue design of CHS-SHS T-joints

机译:CHS-SHS T型接头疲劳设计的应力集中系数

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摘要

Alternative type of nodal joints consisting of Circular Hollow Section (CHS) braces and SquarernHollow Section (SHS) chords (CHS-SHS joints)have increasingly been studied to understand strain distributionrnand therefore Stress Concentration Factors (SCFs) at weld toes on the braces and chords for fatigue design inrnstructural systems subjected to cyclic loading. Experimental Strain Concentration Factors (SNCFs) for eightrnCHS-SHS T-joints with unique non-dimensional parameters were determined in this research resulting in thernevaluation of SCFs for fatigue design. Using the ANSYS software, a three-dimensional Finite Element Modelrn(FEM) was then developed to simulate the stress distribution at the brace-chord welded interface under axialrnforce and in-plane bending in the brace.A parametric study was carried out to determine the SCFs for numerousrnmodels with unique non-dimensional parameters. Graphs are drawn which can be used for the estimation ofrnSCFs in these joints.
机译:越来越多地研究了由空心空心截面(CHS)支撑和方型空心截面(SHS)弦(CHS-SHS缝)组成的节点型接头,以了解应变分布,因此,在支撑和弦上的焊趾处应力集中因子(SCF)用于承受循环载荷的疲劳设计工业系统。本研究确定了具有唯一无量纲参数的8个CHS-SHS T型接头的实验应变集中因子(SNCF),从而对用于疲劳设计的SCF进行了重新评估。然后使用ANSYS软件开发三维有限元模型(FEM),以模拟在支撑杆的轴向力和面内弯曲情况下支撑杆和弦的焊接界面处的应力分布。具有独特的无量纲参数的众多模型的SCF。绘制了可用于估计这些关节中的rnSCF的图。

著录项

  • 来源
    《Tubular structures XIV》|2012年|359-366|共8页
  • 会议地点 London(GB)
  • 作者单位

    College of Civil Engineering, Tongji University, Shanghai, China;

    College of Civil Engineering, Tongji University, Shanghai, China;

    School of Engineering, University ofWestern Sydney, Penrith South DC, NSW, Australia;

    Department of Civil Engineering, Monash University, Melbourne, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
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