【摘要】 为得到一种较优的波形钢腹板-翼缘板焊件焊接工艺，以头道河大桥为工程背景，采用ABAQUS建立了3种不同加载工况下的焊接数值计算模型，得到了焊接过程中焊件的温度场变化，并对比了单面焊件在不同焊接顺序下的纵向残余应力分布，分析了单面焊件和双面焊件在折角区域焊缝的纵向残余应力分布，考虑了变截面对关键细节纵向残余应力的影响。结果表明：焊缝附近的等效残余应力接近Q345钢材的屈服应力，不容忽视；合理的焊接顺序能够降低单面焊件在折角区域焊缝的纵向残余应力；对于双面焊件，先焊一侧的焊缝应力水平低于单面焊件的，而后焊一侧的焊缝应力水平则高于单面焊件的，为减小折角焊缝区域的纵向残余应力，建议采用先焊折角圆弧外侧，再焊圆弧内侧的双面焊焊接工艺；关键细节的纵向残余应力与翼缘板厚度呈负相关。更多还原

【Abstract】 In order to obtain a better welding process of corrugated steel web flange plate weldment,with Toudaohe bridge taken as the engineering background,the welding numerical calculation models under three different loading conditions are to be established by using ABAQUS,thus obtaining the changes of temperature field of weldment during the process of welding,followed by a comparison of the longitudinal residual stress distribution of single-sided weldment under different welding sequences,as well as an analysis of the longitudinal residual stress distribution of single-sided weldment and double-sided weldment in the fillet area,with the influence of variable section on the longitudinal residual stress of key details taken into consideration.The research results show that the equivalent residual stress near the welding line is close to the yield stress of Q345 steel,a factor that should not be ignored;meanwhile a reasonable welding sequence helps to reduce the longitudinal residual stress of the single-sided weldment in the corner area;for the double-sided weldment,the stress level of the weld on the first welding side is lower than that of the single-sided weldment,while the stress level of the welding line on the second welding side is higher than that of the single-sided weldment.In order to reduce the longitudinal residual stress in the fillet weld area,it is suggested to adopt the double-sided welding process of an initial welding of the outside of the fillet arc and a subsequent welding of the inside of the arc;moreover,the longitudinal residual stress of key details is negatively correlated with the thickness of flange plate.更多还原