Research on the Residual Stress and Influence Factors of Butt Welding Channel Section of BS700 High Strength Steel

2018 5th International Conference on Advanced Materials, Mechanics and Structural Engineering

材料科学;机械制造;土木建筑工程

Gao, L.^1 ; Wang, Q.^1 ; Bai, L.Y.^1 ; He, X.H.^1

College of Filed Engineering, Army Engineering University of PLA, Nan Jing, Jiangsu

210007, China^1

关键词: Channel sections;    Fatigue performance;    Longitudinal welds;    Residual distribution;    Residual tensions;    Thickness of walls;    Transverse residual stress;    Welding residual stress;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/473/1/012013/pdf
DOI  :  10.1088/1757-899X/473/1/012013

来源: IOP

【 摘 要 】

Taking the butting weld structure of channel which was fabricated by BS700 as study object, the residual stress and influence factors of welding box section which was butted by two channel section were studied. The study results show that the main welding residual stress of butt weld channel steel is longitudinal residual tension stress, and it affect the stability and fatigue performance. Longitudinal residual distribution of two pieces of weld are located at the district of tension stress, the residual stress of welding foot in the second weld have bigger peak value. The varieties of section length have influence on transverse residual stress, but have little influence on longitudinal residual distribution. Changes of thickness of wall in channel section have marked influence on residual stress value of transverse and longitudinal weld. So it is necessary to choose appropriate thickness of channel for reducing the influence of residual stress on channel steel structure.