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本文除讨论钢筋混凝土简支正交板桥荷载有效分布宽度计算公式所存在的问题以及公式来源之外,并与几种试验与经验公式的结果进行了比较。通过板的理论和一些基本假定,导出各向同性等截面简支板承受线性荷载时挠度与弯矩的表达式。经过计算并采用换算应力概念得到当c/l=0.02,v=1/6,B/l=0.5～4时,有效分布宽度的数据。最后,归纳本文的结果提出几点具体意见作为我国修订公路与城市桥梁设计规范时的参考。
In addition to the problems existing in the calculation formula of the effective distribution width of reinforced concrete simply-supported orthogonal bridges and the source of the formulas, this paper compares the results of several experimental and empirical formulas. Based on the theory of the plate and some basic assumptions, the expressions of the deflection and bending moment of an isotropic simply supported plate subjected to a linear load are derived. After calculating and adopting the concept of reduced stress, the effective distribution width data is obtained when c/l=0.02, v=1/6, and B/l=0.5~4. Finally, the conclusions of this paper provide several specific opinions as a reference for China’s revision of highway and urban bridge design specifications.