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运用有限元数值计算,分析总结出对于较矮的单箱双室简支梁,单横坡的增大将导致上板低侧(高侧)剪力滞系数减小(增大)。通过分析箱梁高度变化对单横坡结构箱梁高、低侧剪力滞系数影响,得出具有单横坡结构的箱梁的剪力滞系数横向分布主要受到两个因素影响:即约束扭转效应和箱梁高度,且随梁高变化(增高或降低),外荷载影响相对自重很小时,剪力滞系数的变化是单调的,即低侧(高侧)剪力滞系数随梁高增大而增大(减小);而外荷载影响与自重接近时,剪力滞系数随梁高的变化是不确定的。
The finite element numerical analysis shows that the increase of single slope will result in the decrease (increase) of the shear lag coefficient of the low side (high side) of the upper plate for the shorter single box double-chamber girder. By analyzing the influence of the height of box girder on the high and low lateral shearing lag coefficient of box girder, the horizontal distribution of shear lag coefficient of box girder with single slant slope structure is mainly affected by two factors: constrained torsion Effect and box girder height, and the change of shear lag lag coefficient is monotonous with the change of the height of the girder (increase or decrease) and the relative weight of the external load small, that is, the shear lag coefficient of the low side (high side) increases with the height of the girder Increases (decreases). However, when the influence of external load and self-weight are close, the change of shear lag coefficient with the height of beam is uncertain.