Another Approach to Simplified Design of a Curved Steel Girder

In recent years several publications discussing an approximate analysis of a curved girder grid system were presented. In the first paper by Richardson, Gordon and Associates, a two-girder system connected with diaphragms was discussed. Further development for the multi-girder system connected by diaphragms was published by U. S. Steel Corporation. The presentation of W. T. Robertson at the ASCE meeting in October, 1965 and the article by James W. Gillespie4 also can be mentioned, among other publications concerned with the same subject. The principal assumption of analysis used in all the above mentioned publications is based on the well established fact that the change in torque between two points of a curved girder subjected to bending is equal to the area of bending moment diagram between these points, divided by the radius of curvature of the girder.