钢桥面板U肋焊接残余应力影响因素分析
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摘要
为了进行钢桥面板U肋焊接残余应力精确计算及影响因素定量分析,以星海湾跨海大桥钢桥面板U肋为研究对象,在ABAQUS有限元软件中,建立钢桥面板U肋局部模型,通过自编的Dflux子程序,进行双椭球热源的加载,模拟V型坡口焊的焊接过程,得到顶板与U肋板残余应力分布,从而研究顶板板厚与焊接坡口角度2种因素对U肋焊接残余应力的影响。结果表明:本文的分析方法得到的焊接残余应力计算结果与前人试验数据结果对比,两者吻合较好,本文分析方法有效;顶板与U肋板在靠近焊缝处都出现最大残余拉应力,且均超过材料的屈服极限;随着顶板板厚增大,顶板与U肋板的残余拉应力峰值增大;而随着坡口角度增大,顶板与U肋板的残余拉应力峰值则减小。
To precisely calculate welding residual stresses in U ribs of steel deck plate and conduct quantitative analysis of influential factors,the U ribs of steel deck plate of Xinghai Bay SeaCrossing Bridge was taken as the study object.In the ABAQUS finite element software,the local models of U ribs of steel deck plate were established.Loads were applied to the double ellipsoidal heat models via the compiled subsidiary Dflux programme.The welding process of the V-groove welds was modeled,to obtain the residual stresses distribution in the top plates and U rib plates and to study the influence of thickness of top plate and angle of welding grooves on the residual stresses in the U ribs.The results show that the calculated data of welding residual stresses obtained by the analytical method proposed in this paper agree well with the previous experimental data,proving that the method is effective.The maximum residual stresses in the top plates and the U rib plates all occur near the welds,and exceed the yielding limitation of the material.As the thickness of top plate increases,the peak values of residual stresses in the top plates and U ribs increase.However,the increase of the angle of grooves results in the decrease of the peak values of residual stresses in the top plates and U rib plates.
To precisely calculate welding residual stresses in U ribs of steel deck plate and conduct quantitative analysis of influential factors,the U ribs of steel deck plate of Xinghai Bay SeaCrossing Bridge was taken as the study object.In the ABAQUS finite element software,the local models of U ribs of steel deck plate were established.Loads were applied to the double ellipsoidal heat models via the compiled subsidiary Dflux programme.The welding process of the V-groove welds was modeled,to obtain the residual stresses distribution in the top plates and U rib plates and to study the influence of thickness of top plate and angle of welding grooves on the residual stresses in the U ribs.The results show that the calculated data of welding residual stresses obtained by the analytical method proposed in this paper agree well with the previous experimental data,proving that the method is effective.The maximum residual stresses in the top plates and the U rib plates all occur near the welds,and exceed the yielding limitation of the material.As the thickness of top plate increases,the peak values of residual stresses in the top plates and U ribs increase.However,the increase of the angle of grooves results in the decrease of the peak values of residual stresses in the top plates and U rib plates.
引文
[1]Deng D,Murakawa H.Prediction of Welding Distortion and Residual Stress in a Thin Plate Butt-Welded Joint[J].Computational Materials Science,2008,43(2):353-365.
[2]Kainuma S,Yang M,Jeong Y S,et al.Experiment on Fatigue Behavior of Rib-to-Deck Weld Root in Orthotropic Steel Decks[J].Journal of Constructional Steel Research,2016(119):113-122.
[3]Zhao Q,Guo Z,Shen X,et al.Test Study on Residual Stress Distribution of Hybrid Steel U-Rib Stiffened Plates[J].Journal of Constructional Steel Research,2016(121):261-267.
[4]卜一之,王一莹,崔闯.新型正交异性钢桥面板关键部位疲劳性能研究[J].世界桥梁,2015,43(5):20-24.
[5]罗鹏军,张清华,龚代勋,等.钢桥面板U肋与顶板双面焊连接疲劳性能研究[J].桥梁建设,2018,48(2):19-24.
[6]尹红,严正贤.制作工艺对正交异性钢桥面板焊缝接头抗疲劳性能的影响[J].世界桥梁,2011(6):34-37.
[7]Deng D.FEM Prediction of Welding Residual Stress and Distortion in Carbon Steel Considering Phase Transformation Effects[J].Materials&Design,2009,30(2):359-366.
[8]郭广飞,王勇,韩涛,等.双椭球热源参数调整在预测在役焊接熔池尺寸上的应用[J].压力容器,2013,30(1):15-19,39.
[9]梅大鹏,廖贵星.新型镦边U肋与面板连接焊缝切口应力分析[J].桥梁建设,2017,47(1):65-70.
[10]陈一馨,吕彭民,李大涛.U肋与横隔板焊接构造细节疲劳强度研究[J].桥梁建设,2014,44(3):63-68.
[11]贾恩实,马润平,张强.欧美规范中公路桥梁正交异性钢桥面板抗疲劳设计对比分析[J].世界桥梁,2013,41(2):31-34.
[2]Kainuma S,Yang M,Jeong Y S,et al.Experiment on Fatigue Behavior of Rib-to-Deck Weld Root in Orthotropic Steel Decks[J].Journal of Constructional Steel Research,2016(119):113-122.
[3]Zhao Q,Guo Z,Shen X,et al.Test Study on Residual Stress Distribution of Hybrid Steel U-Rib Stiffened Plates[J].Journal of Constructional Steel Research,2016(121):261-267.
[4]卜一之,王一莹,崔闯.新型正交异性钢桥面板关键部位疲劳性能研究[J].世界桥梁,2015,43(5):20-24.
[5]罗鹏军,张清华,龚代勋,等.钢桥面板U肋与顶板双面焊连接疲劳性能研究[J].桥梁建设,2018,48(2):19-24.
[6]尹红,严正贤.制作工艺对正交异性钢桥面板焊缝接头抗疲劳性能的影响[J].世界桥梁,2011(6):34-37.
[7]Deng D.FEM Prediction of Welding Residual Stress and Distortion in Carbon Steel Considering Phase Transformation Effects[J].Materials&Design,2009,30(2):359-366.
[8]郭广飞,王勇,韩涛,等.双椭球热源参数调整在预测在役焊接熔池尺寸上的应用[J].压力容器,2013,30(1):15-19,39.
[9]梅大鹏,廖贵星.新型镦边U肋与面板连接焊缝切口应力分析[J].桥梁建设,2017,47(1):65-70.
[10]陈一馨,吕彭民,李大涛.U肋与横隔板焊接构造细节疲劳强度研究[J].桥梁建设,2014,44(3):63-68.
[11]贾恩实,马润平,张强.欧美规范中公路桥梁正交异性钢桥面板抗疲劳设计对比分析[J].世界桥梁,2013,41(2):31-34.