摘要
对工程实践中广为采用的单室薄壁箱梁竖向弯曲时由剪力滞后效应引起的纵向翘曲位移的函数形式进行了探讨,导出了均布荷载作用下剪滞系数的解析表达式;通过对不同跨宽比值、不同翼板宽度的简支单室钢箱梁桥的剪力滞后效应进行计算分析,研究发现,内外翼板宽度越悬殊,剪力滞后效应越显著;另外,跨宽比值小于3时箱梁的剪力滞后现象已经相当严重。
In this paper, the function form of longitudinal warp displacement w hi ch produced by lag-effect of shearing force of the beam with single box section is discussed, the expression of the c oefficient of lag-effect of shearing force of the beam with proportional spacin g loads is deduced . The results show that the larger the difference in the widths between inner an d outside wing plates, the more obvious the lag-effect of shearing force; and t hat the effect of shear lag is considerably serious when the ratio of beam′s span and its section′s width is less than 3.
出处
《钢结构》
2005年第3期39-42,共4页
Steel Construction
基金
云南省教育厅科学研究基金资助(编号:0142015)
