混凝土薄壁箱梁翼缘等效计算宽度

Equivalent Calculated Flange Width of Concrete Thin-walled Box Girder

阐述了混凝土薄壁箱梁受压翼缘剪力滞效应与其等效计算宽度之间的内在关系,给出了混凝土薄壁箱梁受压翼缘等效宽度计算系数的严格定义;同时,结合混凝土单轴受压本构关系,推导得出了混凝土薄壁箱梁弹性受力状态下和承载力极限状态下,受压翼缘等效宽度计算系数公式,为应用初等混凝土梁理论解决混凝土薄壁箱梁正截面抗弯承载力计算奠定了基础。

Internal relations of shear lag effect and equivalent calculated flange width of concrete thin-walled box girder are disclosed, and equivalent calculated coefficient of flange width is exactly defined.Combined uniaxial compressed concrete constitutive laws, the formula on equivalent calculated coefficient of compressed flange width in elastic stage and limit stage are proposed to establish theoretical foundation for applying basic concrete beam theory to settle the flexural capacity calculation of concrete thin-walled box girder.