钢桥面板横向焊接残余应力分布及其对疲劳寿命的影响
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摘要
采用数值模拟方法对钢桥面板的横向焊接残余应力分布进行研究,分析钢桥面板的板宽与板厚变化对横向焊接残余应力分布的影响,进一步分析了横向残余应力对钢桥面板疲劳寿命的影响。结果表明:加劲肋腹板的板宽变化对横向残余应力的分布影响不大,而母板的板宽增大会使得横断面及纵断面稳定区域的横向残余应力增大;对于板厚,随着母板和加劲肋的板厚增大都会引起横向残余应力的增大;焊接残余应力会导致各个阶段的疲劳寿命减小,但是对裂纹较小阶段的寿命影响较大。
The residual stress distribution of transverse welding of steel bridge deck is studied by numerical simulation, and the influence of plate width and plate thickness change on the residual stress distribution of transverse welding and lateral residual stress on the fatigue life of steel deck slab is analyzed. The results show that the change of plate width of stiffened rib webs has little effect on the distribution of transverse residual stress, and the increase of plate width of the motherboard will increase the transverse residual stress in the stable area of the cross section and profile. For plate thickness, the lateral residual stress increases with the increase of plate thickness of motherboard and stiffening rib, and the fatigue life of welding residual stress decreases in each stage, but it has a great influence on the life of the smaller stage of crack.
The residual stress distribution of transverse welding of steel bridge deck is studied by numerical simulation, and the influence of plate width and plate thickness change on the residual stress distribution of transverse welding and lateral residual stress on the fatigue life of steel deck slab is analyzed. The results show that the change of plate width of stiffened rib webs has little effect on the distribution of transverse residual stress, and the increase of plate width of the motherboard will increase the transverse residual stress in the stable area of the cross section and profile. For plate thickness, the lateral residual stress increases with the increase of plate thickness of motherboard and stiffening rib, and the fatigue life of welding residual stress decreases in each stage, but it has a great influence on the life of the smaller stage of crack.
引文
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[6] Vuong Nguyen Van Do,Chin-Hyung Lee,Kyong-Ho Chang.High cycle fatigue analysis in presence of residual stresses by using a continuum damage mechanics model[J].International Journal of Fatigue,2015,70:51–62.
[7] 赵欣欣,刘晓光,潘永杰,等.正交异性钢桥面板纵肋腹板与面板连接构造的疲劳试验研[J].中国铁道科学,2013,34(2):41-45.
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[9] 卞如冈,崔维成,万正权,等.焊接残余应力对疲劳寿命影响的定量研究[J].船舶力学,2011,15(7):776-783.
[10] 陈长俊.福州地区钢桥面板疲劳设计荷载与疲劳寿命分析[D].福州:福州大学,2015.
[2] 李立峰,邵旭东.正交异性闭口加劲板的承载力分析理论及试验研究[J].土木工程学报,2007,40(6):42-48.
[3] 顾萍,颜兆福,盛博,等.正交异性钢桥面板栓焊接头疲劳性能[J].同济大学学报(自然科学版),2013,41(6):821-825.
[4] Gurney T R.Cumulative damage of welded joints [M].Cambridge:Abington Publishing,2006.
[5] Hiroyuki Terada.Stress Intensity Factor Analysis and Fatigue Behavior of A Crack in The Residual Stress Field of Welding[J].Fatigue of Aircraft Structures,2011,3(1):5-15.
[6] Vuong Nguyen Van Do,Chin-Hyung Lee,Kyong-Ho Chang.High cycle fatigue analysis in presence of residual stresses by using a continuum damage mechanics model[J].International Journal of Fatigue,2015,70:51–62.
[7] 赵欣欣,刘晓光,潘永杰,等.正交异性钢桥面板纵肋腹板与面板连接构造的疲劳试验研[J].中国铁道科学,2013,34(2):41-45.
[8] 周金枝.焊接残余应力对焊接构件疲劳寿命的影响[C].第五届全国 MTS 材料试验学术会议论文集,2001.
[9] 卞如冈,崔维成,万正权,等.焊接残余应力对疲劳寿命影响的定量研究[J].船舶力学,2011,15(7):776-783.
[10] 陈长俊.福州地区钢桥面板疲劳设计荷载与疲劳寿命分析[D].福州:福州大学,2015.