蜂窝构件开孔截面焊接残余应力分布研究

发布时间：2019-02-22 10:49

【摘要】：该文采用盲孔法,对7根蜂窝式钢构件开孔处截面焊接残余应力进行检测,对比六边形和圆形两种典型孔型下,不同开孔率、开孔方式蜂窝构件开孔处截面纵向焊接残余应力数值大小和分布范围。分析不同影响因素下,蜂窝构件开孔处板桥残余应力变化特点。结果表明:蜂窝构件开孔处截面焊接残余应力较实腹构件分布趋势相似,焊缝区残余应力峰值接近钢材屈服强度。蜂窝构件腹板开孔形状对焊接残余应力分布影响很小;板桥残余应力峰值随着开孔率的增大而减小;腹板直接开孔蜂窝构件较切割错位焊接蜂窝构件残余应力分布有所不同。在试验数据数值分析的基础上,提出了不同加工工艺下蜂窝构件开孔截面焊接残余应力分布模式,为后续蜂窝构件整体稳定承载力研究提供基础数据。
[Abstract]:In this paper, the welding residual stress at the open hole of 7 honeycomb steel members is detected by blind hole method. The numerical value and distribution range of the longitudinal welding residual stress at the opening section of honeycomb members with open holes. The variation characteristics of residual stress of plate bridge at the hole of honeycomb member are analyzed under different influence factors. The results show that the distribution trend of welding residual stress at the open hole of honeycomb member is similar to that of solid web member, and the peak value of residual stress in weld zone is close to the yield strength of steel. The shape of web opening of honeycomb members has little effect on the distribution of welding residual stress; the peak value of residual stress of plate bridge decreases with the increase of opening rate; the distribution of residual stress of beehive members directly with web openings is different from that of dislocated welded honeycomb members. Based on the numerical analysis of the experimental data, the distribution mode of welding residual stress in the open-hole section of honeycomb members under different processing processes is proposed, which provides the basic data for the subsequent study on the overall stability capacity of honeycomb members.
【作者单位】：沈阳建筑大学土木工程学院;北京迈达斯技术有限公司;中国人民解放军93321部队;
【基金】：辽宁省自然科学基金项目(201102181)
【分类号】：TU391

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