Research on Factors Influencing Residual Stress Distribution of Butt Weld Joints of Bridge Steel
In order to study the influence of different factors on the residual stress distribution of butt weld joints of bridge steel,this project established a finite element model reflecting the butt welding process of Q345qDNH bridge steel to analyze the rule the residual of stress distribution.Two influence factors,including material properties and weld reinforcement,were considered in the model.The results show that the maximum distribution area of welding residual stress is larger than that of the steel plate specimen without considering the change of strain with temperature,and the range of welding heat influence is wider,while the residual stress value of the specimen considering the strain change is relatively larger.The existence of residual height will cause obvious stress concentration at the welding toe of the welded joint.
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