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-  2018 

钢箱梁横隔板-U肋交接部位疲劳应力有限元分析 FEA for fatigue stress of diaphragm-U rib connection in steel box girder

Keywords: 钢箱梁,焊接接头,疲劳应力,单元类型,网格尺寸

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Abstract:

为探索钢箱梁横隔板-U肋交接部位疲劳应力(包括焊接接头热点应力以及钢板母材疲劳应力)的有限元分析方法,采用ABAQUS分别建立钢箱梁体壳混合有限元模型和纯板单元模型,计算轮载作用下的构造疲劳应力,分析了单元类型、网格精度及表面外推方法对计算疲劳应力的影响.得到以下结论:1)单元类型与网格尺寸是构造细节计算疲劳应力的主要影响因素,外推方法对热点应力也存在较大影响;2)热点应力计算建议采用高阶的四面体或六面体单元,局部单元网格划分至1/4板厚;3)采用表面外推法计算焊趾热点应力时,应力取值点宜位于距焊趾0.5t(t为板厚)以外,建议采用DNV等船级社推荐的三点二次外推法,该结论对于焊缝a类、c类热点均适用;4)对于弧形切口母材局部应力,采用体单元时单元应划分至1.3mm,采用板单元时应划分至0.3mm,板单元计算应力较体单元普遍偏小,建议采用二阶体单元以准确模拟板厚方向的非线性应力分布

References

[1]  吕彭民,李大涛.正交异性钢桥面板顶板疲劳性能研究[J].中国公路学报,2014,(2):84-89.LüPengmin,Li Datao.Fatigue research on bridge deck-plate of orthotropic steel bridge deck[J].China Journal of Highway and Transport,2014,(2):84-89.
[2]  Wang B.Fatigue assessment of the diaphragm-to-rib welded connection in orthotropic steel deck using effective notch stress approach[J].Journal of Failure Analysis and Prevention,2015,15(1):65-73.
[3]  Liu R,Liu Y,Ji B,et al.Hot spot stress analysis on ribdeck welded joint in orthotropic steel decks[J].Journal of Constructional Steel Research,2014,97:1-9.
[4]  Zhang Q,Cui C,Bu Y,et al.Fatigue tests and fatigue assessment approaches for rib-to-diaphragm in steel orthotropic decks[J].Journal of Constructional Steel Research,2015,114:110-118.
[5]  周张义,李芾.基于表面外推的热点应力法平板焊趾疲劳分析研究[J].铁道学报,2009,(5):90-96.Zhou Zhangyi,Li Fu.Study on fatigue analysis of welded toes of plate structures using hot spot stress method based on surface extrapolation[J].Journal of the China Railway Society,2009,(5):90-96.
[6]  陈卓异,李传习,柯璐,等.某悬索桥钢箱梁疲劳病害及处治方法研究[J].土木工程学报,2017,(3):91-100.Chen Zhuoyi,Li Chuanxi,Ke Lu,et al.Study on fatigue damages and retrofit methods of steel box girder in a suspension bridge[J].China Civil Engineering Journal,2017,(3):91-100.
[7]  BS EN 1993-1-9:2005,Eurocode 3:Design of Steel Structures-Part 1-9:Fatigue[S].
[8]  Shao Xudong,Yi Dutao,Huang Zhengyu,et al.Basic performance of the composite deck system composed of orthotropic steel deck and ultrathin RPC layer[J].Journal of Bridge Engineering,2013,18(5):417-428.
[9]  唐亮,黄李骥,刘高,等.正交异性钢桥面板足尺模型疲劳试验[J].土木工程学报,2014,(3):112-122.Tang Liang,Huang Liji,Liu Gao,et al.Fatigue experimental study of a full-scale steel orthotropic deck model[J].China Civil Engineering Journal,2014,(3):112-122.
[10]  韩冰,蒲黔辉,施洲,等.桥梁正交异性板焊接构造热点应力计算方法研究[J].桥梁建设,2015,(1):56-61.Han Bing,Pu Qianhui,Shi Zhou,et al.Study of calculation methods for hot spot stress of welded structure of bridge orthotropic plate[J].Bridge Construction,2015,(1):56-61.
[11]  曾志斌.正交异性钢桥面板典型疲劳裂纹分类及其原因分析[J].钢结构,2011,(2):9-15.Zeng Zhibin.Classification and reasons of typical fatigue cracks in orthotropic steel deck[J].Steel Structure,2011,(2):9-15.
[12]  Zhang Q,Cui C,Bu Y,et al.Fatigue tests and fatigue assessment approaches for rib-to-diaphragm in steel orthotropic decks[J].Journal of Constructional Steel Research,2015,114:110-118.
[13]  Yang M,Ji B,Yuanzhou Z,et al.Fatigue behavior and strength evaluation of vertical stiffener welded joint in orthotropic steel decks[J].Engineering Failure Analysis,2016,70:222-236.
[14]  狄生奎,文铖,叶肖伟.正交异性钢桥面板结构热点应力有限元分析[J].浙江大学学报(工学版),2015,(2):225-231.Di Shengkui,Wen Chen,Ye Xiaowei.Finite element analysis of structural hot-spot stress for orthotropic steel bridge deck[J].Journal of Zhejiang University(Engineering Science Edition),2015,(2):225-231.
[15]  李立峰,张东波,袁卓亚,等.正交异性钢桥面板中弧形缺口的受力分析[J].公路交通科技,2012,(4):55-61.Li Lifeng,Zhang Dongbo,Yuan Zhuoya,et al.Stress analysis of arc-shaped cutouts in steel orthotropic deck plates[J].Journal of Highway and Transportation Research and Development,2012,(4):55-61.
[16]  Aygül M,Al-Emrani M,Urushadze S.Modelling and fatigue life assessment of orthotropic bridge deck details using FEM[J].International Journal of Fatigue,2012,40:129-142.

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