为确定钢-混凝土组合桥面板在简化计算时单向板与双向板的界限值,采用有限元方法建立了基于弹性理论的分析模型。考虑钢-混凝土组合桥面板中的均布荷载作用效应,对不同边长比下的四边简支钢-混凝土组合桥面板进行研究。结果表明,随着边长比的增大,弯矩和反力沿短边传递的效应越明显;当边长比大于3时,钢-混凝土组合桥面板长边方向的荷载传递和弯矩分配效应均达到或超过总效应的85%;建议在进行弹性理论分析时,以边长比等于3作为四边简支钢-混凝土组合板单、双向的界限值。 In order to determine the limit value of the one-way plate and the two-way plate in the simplified steel-concrete composite deck, finite element method was used to establish the analytical model based on elasticity theory. Considering the effect of uniform load in steel-concrete composite bridge deck, the four sides simply supported steel-concrete composite bridge deck with different ratio of side lengths is studied. The results show that the bending moment and reaction force propagate along the short side with the increase of edge length ratio. When the edge length ratio is greater than 3, the load transfer and moment distribution in the longitudinal direction of the steel-concrete composite deck The results all reach or exceed 85% of the total effect. It is suggested that the edge length ratio is equal to 3 as the single and bidirectional limit value of the four sides simple supported steel-concrete composite board during the elastic theory analysis.