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以港珠澳大桥江海直达通道为工程背景,对桥面加劲板的静力与动力特性进行研究.运用组合板梁单元法分析梯形肋加劲板,其中顶板用平板壳单元分析,而构成梯形肋的各个子板件则用板梁单元分析.同时,构造了8节点的实体板单元进行铺装层的模拟.重点研究桥面铺装对桥面板位移、应力以及自振频率的影响,并将计算结果与ANSYS有限元分析结果进行比较.结果表明:本文方法计算结果与ANSYS计算值均比较吻合,从而验证了本文方法的准确性,同时由于本文方法的自由度少,划分单元数量少,因此计算效率更高;另外,桥面铺装不仅具有自重效应,而且对桥面结构有一定的刚度贡献,因此在分析桥面结构力学特性尤其是在精确分析时,需要考虑桥面铺装的作用,且不能简单地以等效荷载的形式考虑.“,”Taking Jianghai navigation channel of Hong Kong-Zhuhai-Macao Bridge as engineering background,static and dynamic properties of bridge deck of steel box girder are studied.The trapezoidal stiffened plate is analyzed by using combined plate beam element.In this approach,the top plate and the trapezoid stiffener are respectively taken as the flat shell element and the plate-beam element.Besides,an 8-nodes solid plate element is constructed to simulate the bridge deck pavement.The influence of the bridge deck pavement on the displacement,stress and natural frequency of bridge deck is studied.The results are compared with that computed by FE software ANSYS.The results show that:first,the approach presented in this paper is both accurate and efficient;Second,bridge deck pavement has the effects of both self-weight and rigidity,therefore,the bridge deck pavement should be considered when analyzing the mechanical properties of bridge deck structure.