%0 Journal Article
%T 复杂轨道高程误差下钢箱梁滑移受力敏感性研究<br>Sensitive reserch of orbit elevation error of steel box girder slipping in the complicated track
%A 袁鹏
%A 李德建
%A 陆尧
%A 李传习&lt
%A br&gt
%A YUAN Peng
%A LI Dejian
%A LU Yao
%A LI Chuanxi
%J 铁道科学与工程学报
%D 2016
%X 为了获得钢箱梁复杂轨道滑移过程中各种极端情况下结构受力及变形敏感性结果,运用有限元软件ANSYS,建立考虑面-面接触效应的钢箱梁和轨道有限元模型,对嘉绍大桥无索区钢箱梁复杂轨道滑移过程中的2个最不利工况进行结构受力及变形敏感性分析并讨论各工况下的误差控制标准。研究结果表明:在钢箱梁复杂轨道滑移过程中,滑块支反力、结构变形及应力对轨道底约束方式和轨道高程误差比较敏感;滑块处轨道底约束方式相同时,轨道架设对角高程误差不应超过5 mm,极限误差不能超过8 mm;滑块处轨道底约束方式不同时,轨道高程误差不应超过2 mm,极限误差不能超过4 mm;轨道底约束刚度越大支反力对高程误差越敏感、强约束处的支反力分配比较大、支反力增长率较快,且容易发生面外屈曲。<br>Based on the slipping process research of Jiashao Bridge between steel box girder and complex track in area without stayed cable under 2 types of most unfavourable condition, a FEM model, considering the contact effects between steel box girders and tracks, was established for the sensitivity analysis of structure force and deformation in various types of extreme condition by ANSYS. The standard of error control in different working conditions were discussed. The result shows that slider bearing reaction, structure deformation and stress are sensitive to restraint conditions on track bottom and track elevation error during slipping process. If track bottom has the same restraint, diagonal elevation error of track erection shouldn’t be more than 5 mm and limit value should be 8 mm. If restraint conditions are different, diagonal elevation error shouldn’t be more than 2 mm and limit value should be 4 mm. In conclusion, the stronger restraint conditions, the more sensitive vertical error of bearing reaction, the larger distribution ratio of bearing reaction and the larger increase ratio of bearing reaction, the in-plane buckling easily
%K 桥梁工程
%K 复杂轨道
%K 敏感性分析
%K 轨道高程误差
%K 应力变化幅值&lt
%K br&gt
%K bridge engineering
%K complex track
%K sensitivity analysis
%K track elevation error
%K stress amplitude
%U http://www.jrse.cn/paper/paperView.aspx?id=paper_312630