波形腹板工字钢焊接变形与残余应力分布研究

闫林君; 李林龙; 关义朋; 王起才

doi:10.3724/j.gyjzG23111412

波形腹板工字钢焊接变形与残余应力分布研究

doi: 10.3724/j.gyjzG23111412

兰州交通大学土木工程学院, 兰州 730070

基金项目:

甘肃省科技重点研发项目（20YF3FA039）。

详细信息

作者简介:
闫林君，博士研究生，副教授，2843881181@qq.com。

通讯作者:
王起才，博士，教授，博士生导师，wangqc@lzjtu.edu.cn。

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- 文章访问数: 15
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- 被引次数: 0
出版历程
- 收稿日期: 2023-11-14
- 网络出版日期: 2026-04-11
- 刊出日期: 2026-03-20

Research on Distribution of Welding Deformation and Residual Stress of Corrugated Web I-Beams

College of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

摘要

摘要: 为探究波形腹板工字钢焊接变形与残余应力的分布规律，通过电阻应变计法进行波形腹板工字钢焊接残余应力试验，并建立其热弹塑性三维有限元模型，将二者结果进行对比验证了所建立模型的正确性。采用同种方法建立等尺寸平腹板工字钢有限元模型。采用提取应力云图与在模型中设置多条路径的方式对2种不同类型腹板工字钢的焊接应力进行对比分析，并对平行于焊缝路径空间位移的分布情况进行研究。结果表明：波形腹板与平腹板工字钢纵向残余应力峰值分别为410 MPa与451 MPa，在整个结构中前者因焊接所产生的残余应力小于后者，前者在其波峰前方的底板处具有较大的残余应力分布，而后者残余应力在腹板两侧对称分布；波形腹板工字钢最大空间位移在焊缝右侧底板y+5.3 mm处取得，为1.32 mm，平腹板工字钢最大空间位移在腹板表面z+5.3 mm处取得，为0.96 mm，两者在腹板与底板熔合位置的位移均小于焊缝处，前者测点位移曲线呈波浪形状，而后者较为平缓且各路径间层次分明。
- 波形钢腹板 /
- 焊接试验 /
- 数值模拟 /
- 残余变形 /
- 残余应力
Abstract: In order to investigate the distribution of welding deformation and residual stress in corrugated web I-beams， an experimental study on welding residual stress was conducted using resistance strain gauges. A three-dimensional thermo-elastic-plastic finite element model was established and validated by comparing its results with the experimental data. A finite element model of a flat web I-beam with identical dimensions was also developed using the same methodology. By extracting stress contour plots and defining multiple paths in the model， the welding stress of the two beam types was analyzed. The resultant displacement distribution was studied along paths parallel to the weld. The analysis results showed that the maximum longitudinal residual stresses in the corrugated web and flat web I-beams were 410 MPa and 451 MPa， respectively. Overall， the former exhibited lower welding-induced residual stress than the latter. A region of high residual stress was observed at the bottom plate in front of the wave crest in the corrugated web I-beam， whereas the flat web I-beam showed a symmetrical stress distribution on both sides of the web. The maximum resultant displacement of the corrugated web I-beam was 1.32 mm， located at y+5.3 mm of the bottom plate on the right side of the weld. In contrast， the flat web I-beam had a maximum resultant displacement of 0.96 mm at z+5.3 mm on the web surface. For both types， the displacement at the web-to-bottom-plate junction was less than that at the weld. Furthermore， the displacement curve of the corrugated web I-beam exhibited a wavy profile， while that of the flat web I-beam was relatively smooth with clear distinctions between paths.
- corrugated steel web /
- welding test /
- numerical simulation /
- residual deformation /
- residual stress

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参考文献(18)

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