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随着箱形截面宽度和腹板间距的增大,其剪力滞效应越来越突出。该文结合荆岳长江公路大桥建设,建立超宽分离式混凝土边箱梁空间有限元模型,分析其成桥状态下的剪力滞效应,并与一个截面的剪力滞实测值进行了比较,结果表明:有限元模型计算结果较为准确。使用该有限元模型分析了主梁纵向不同截面的剪力滞效应,得出一些有益的结论。
With the increase of box section width and web spacing, the shear lag effect becomes more and more prominent. Based on the construction of Jingyue Changjiang River Highway Bridge, this paper establishes the space finite element model of ultra wide-separated concrete side box girder, analyzes the shear lag effect under the condition of its completion, and compares it with the measured shear lag of a section. The results show that the finite element model is more accurate. The finite element model is used to analyze the shear lag effect in different longitudinal sections of the main girder, and some useful conclusions are drawn.