To investigate the local dynamic behavior of orthotropic steel bridge decks under impact loads, this paper proposed a type of combined plate-beam element for analysis of trapezoidal stiffened plate and a type of 8-nodes solid-plate element for analysis of pavement. Besides, vehicle wheel loads are supposed to be triangular loads for convenience. Then, a model experiment was conducted to verify the accuracy of the proposed approach. Finally, River-sea-through channel of Hong Kong–Zhuhai–Macao Bridge is taken as an engineering case for computation analysis. The results are compared with those from FE software ANSYS. It shows that: first, the proposed approach is both accurate and efficient; second, bridge deck pavement has the effect of both self-weight and rigidity, which requires the bridge deck pavement be considered when analyzing the mechanical properties of bridge deck structure.

为了研究正交异性钢桥面板在冲击载荷作用下的局部动力行为，提出了一种用于分析梯形加劲板的组合板梁单元和一种用于路面分析的八节点实体板单元。此外，为了方便起见，车轮载荷被认为是三角形载荷。然后，进行了模型实验以验证所提方法的准确性。最后，以港珠澳大桥跨海河道作为计算分析的工程案例。将结果与有限元软件ANSYS的结果进行比较。它表明：首先，所提出的方法既准确又有效。其次，桥面铺装既具有自重又具有刚性的作用，