A Study on Distortional Analysis and Practical Formula for $f_{Dw}/f_{b}$ Ratio of Curved Box Girder Bridges

This paper deals with the distortional analysis and a formula for ratio of curved box girder bridges. And yielded results that were consistent with those of the parameter analysis using the transfer matrix method. The proposed methods are shown to be in good agreement with the finite difference method and energy method. From analyzed the results of variation in the distortional stress due to parametric studies (effects of length/diaphragm spacing ratio, effects of central angle, effects of length/width ratio), Practical formula to presents the ratio for determination of diaphragm spacing.