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采用里兹能量变分法构建剪切应力作用下考虑弹性转动约束边界的组合梁高腹板临界屈曲应力计算模型,基于弹性薄板理论分析混凝土桥面板、剪力钉、钢翼缘板结构特性、材料参数与边界弹性转动约束系数之间的关系,推导由剪力钉连接的钢-混组合翼缘板对腹板的弹性转动约束系数求解公式,通过与工字钢组合梁有限元模型及经典理论边界解的比较,验证了该理论计算模型的准确性,结果显示理论模型计算结果与有限元分析结果符合良好.
Based on the theory of elastic thin plate, the structural characteristics of concrete bridge deck, shear nails and steel flange plate are analyzed with the method of Ritz energy variational method, and the calculation model of critical buckling stress of composite web considering the boundary of elastic rotation constraint under shear stress is established. Material parameters and boundary elastic rotation restraint coefficient of the relationship between deduced by the shear nails connected steel-plastic composite flange plate of the elastic rotation restraint coefficient of the web formula, through the beam with I-beam finite element model and the classic The comparison of the theoretical boundary solutions verifies the accuracy of the theoretical calculation model. The results show that the theoretical model results are in good agreement with the finite element analysis.