Bridge Analysis using Orthotropic Plate Theory

Two analytical methods are presented for use in bridge analysis. The inclusion of orthotropic plate theory permits consideration of any type of deck configuration. Structural continuity between all supporting members and their flexibilities may be considered. Complete computer programs have been developed in order to apply these techniques. One method, slope deflections utilizes the IBM 1620; the other technique, finite differences, uses the IBM 7094. All of the developed equations have been applied to problems consisting of isotropic plates. Complete agreement from both methods and previously analyzed structures occurs for these test cases. An example orthotropic bridge structure is initially designed and then analyzed, when subjected to a truck loading. The resulting deflection and moment data, throughout the structure, are obtained by both analytical methods. These data are compared, resulting in excellent agreement between methods.