中北大学学报（自然科学版）2017，Vol.38Issue(5)：549-555,7.DOI:10.3969/j.issn.1673-3193.2017.05.008
连续刚构桥单箱两室截面主梁在偏载作用下的静力分析
Static Analysis for Main Girder with Single-Box Two-Room Section of Continuous Rigid-Frame Bridge in the Action of Partial Load
摘要
Abstract
In order to study mechanical behavior for main girder with single-box two-room section of con-tinuous rigid-frame bridge in the action of partial load considering shear lag effect,based on energy vari-ous principle,the mechanics model for the continuous rigid-frame bridge with the single-box two-room section in the action of partial load in considering the moment deformation of bridge column and shear lag of main beam was set up.The stiffness equation of the structure was obtained by taking trigonometric function as the displacement of the main beam and power function as bridge pier displacement.The strains and deflections for 6×50m approach bridge of new Jiujiang bridge in load test at bridge were cal-culated.The computed results were compared with those of test.It is shown that in the action of partial load,the transverse distribution of strains on main beam are no-uniform,the strains at load side are lar-ger than those at no-load side;the deformation of web is fit to the plane assumption;if the moment de-formation of bridge column is not considered,the maximum strain and deflection of main beam on the continuous rigid-frame bridge will be highly estimated;the results are agreement with tests.关键词
连续刚构桥/偏载/桥墩弯曲变形/剪力滞/静力分析Key words
continuous rigid-frame bridge/partial load/moment deformation of bridge column/shear lag/static analysis分类
交通工程引用本文复制引用
陈玉骥,罗旗帜,刘登..连续刚构桥单箱两室截面主梁在偏载作用下的静力分析[J].中北大学学报（自然科学版）,2017,38(5):549-555,7.基金项目
国家自然科学基金资助项目(10772046) （10772046）
广东省自然科学基金资助项目(S2011010005037) （S2011010005037）
