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波形钢腹板梁焊接残余应力分布及试验验证

冀伟 刘勇

冀伟, 刘勇. 波形钢腹板梁焊接残余应力分布及试验验证[J]. 西南交通大学学报, 2024, 59(2): 289-297. doi: 10.3969/j.issn.0258-2724.20220054
引用本文: 冀伟, 刘勇. 波形钢腹板梁焊接残余应力分布及试验验证[J]. 西南交通大学学报, 2024, 59(2): 289-297. doi: 10.3969/j.issn.0258-2724.20220054
JI Wei, LIU Yong. Welding Residual Stress Distribution and Experimental Verification of Corrugated Steel Web Girders[J]. Journal of Southwest Jiaotong University, 2024, 59(2): 289-297. doi: 10.3969/j.issn.0258-2724.20220054
Citation: JI Wei, LIU Yong. Welding Residual Stress Distribution and Experimental Verification of Corrugated Steel Web Girders[J]. Journal of Southwest Jiaotong University, 2024, 59(2): 289-297. doi: 10.3969/j.issn.0258-2724.20220054

波形钢腹板梁焊接残余应力分布及试验验证

doi: 10.3969/j.issn.0258-2724.20220054
基金项目: 国家自然科学基金(52168019,51868039);甘肃省重点研发计划(23YFGA0043);中央高校基本科研项目(541109030099)
详细信息
    作者简介:

    冀伟(1982—),男,教授,博士,研究方向为组合箱梁桥设计理论,E-mail:jiwei1668@163.com

  • 中图分类号: U441.5

Welding Residual Stress Distribution and Experimental Verification of Corrugated Steel Web Girders

  • 摘要:

    为研究波形钢腹板梁焊接残余应力的分布规律,通过有限元软件建立其三维热弹塑性模型,利用热-力耦合分析技术对其焊接温度场和应力场进行有限元数值仿真,采用双椭球体热源和修改单元材料属性的方法实现能量输入和焊缝填充,并将模拟计算结果与实测值进行对比分析. 结果表明:有限元预测的波形钢腹板梁残余应力分布与实测结果具有相同趋势,在波形钢腹板梁焊缝的弯折角处,残余应力发生一定幅度的连续应力波动;底板和腹板的残余应力峰值均出现在焊缝中心区域,其值分别为材料屈服强度的1.30倍和1.26倍;底板纵向残余拉应力在焊缝中心线两侧78 mm范围内急速下降后缓慢过渡为压应力,在底板较窄一侧压应力线性增大,最大值约为材料屈服强度的0.61倍;在底板较宽一侧压应力线性减小,并在边缘处转化为拉应力;焊接速度对残余应力分布扰动不大,而对残余应力峰值影响较显著;当焊接速度从150 mm/min增加至250 mm/min时,横向和纵向的残余应力最大值分别增加了27.11%和5.88%.

     

  • 图 1  波形钢腹板梁的几何尺寸

    Figure 1.  Geometric dimensions of corrugated steel web girder

    图 2  有限元模型网格划分

    Figure 2.  Meshing of finite element model

    图 3  S355J2G3钢热物理属性

    Figure 3.  Thermophysical properties of S355J2G3 steel

    图 4  S355J2G3钢力学属性

    Figure 4.  Mechanical properties of S355J2G3 steel

    图 5  双椭球热源模型

    Figure 5.  Double ellipsoidal heat source model

    图 6  温度场变化云图

    Figure 6.  Change nephogram of temperature field

    图 7  距离焊缝不同距离的温度历程曲线

    Figure 7.  Temperature change curves at different distances from the weld

    图 8  位移边界条件

    Figure 8.  Displacement boundary condition

    图 9  焊缝处的残余应力分布

    Figure 9.  Residual stress distribution at the weld

    图 10  底板处的残余应力分布

    Figure 10.  Residual stress distribution at the bottom plate

    图 11  腹板处的残余应力分布

    Figure 11.  Residual stress distribution at the web

    图 12  应变片布置(单位:cm)

    Figure 12.  Arrangement of strain gauges (unit: cm)

    图 13  残余应力实测值与理论计算值的比较

    Figure 13.  Comparison between measured and theoretically calculated values of residual stress

    图 14  在不同焊接速度下的残余应力

    Figure 14.  Residual stress at different welding speeds

    表  1  焊件残余应力合力分析

    Table  1.   Composition of residual stress on welding section kN

    位置 拉应力合力 压应力合力 小计 合计
    底板 上(外)侧 220.6 −201.9 18.7
    下(内)侧 186.6 −176.5 10.1
    平均 203.6 −189.2 14.4
    腹板 上(外)侧 90.1 −104.6 −14.5 4.2
    下(内)侧 67.3 −80.2 −12.9 −2.8
    平均 78.7 −92.4 −13.7 0.7
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出版历程
  • 收稿日期:  2022-01-18
  • 修回日期:  2022-04-18
  • 网络出版日期:  2023-11-10
  • 刊出日期:  2022-05-20

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