In order to utilize several computer programs1 for the analysis of radial curved bridge systems of open cross-section, it is necessary to evaluate section properties. This paper presents and explains a simplified method for evaluating the internal forces in radial curved girder systems; the equations and factors presented permit the designer to determine required cross-sectional properties. A series of simplified equations are presented, which will permit evaluation of internal forces and deformation in a single, two- and three-span curved girder system. These forces can then be utilized to estimate initial section properties, which are necessary in utilizing various computer programs.
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Heins et al. (1970) studied this question.