A dynamic programming (DP) method is presented for analysis of statically determinate and indeterminate bridges subjected to moving loads such as those specified by the American Association of State Highway and Transportation Officials (AASHTO) specifications. These loads consist of uniform lane loading, two-axle truck loading and two-axle truck plus one-axle semitrailer loading. The solution of the DP problem is based on the use of influence line diagrams and extremum functions. Recurrence formulae have been developed for various types of AASHTO live loads. The procedure presented in this article is quite general and can be applied to any typc of structures with linear behaviour and any type of moving loads. Six examples are presented: a simply-supported beam, a simply-supported Pratt truss, an arch bridge, a continuous Pratt truss, a continuous frame and a cable-stayed bridge. ILD's and finding the critical location of moving loads and the maximum effects.
Adeii and Balasubramanyam', recently presented a heuristic approach for analysis of bridge trusses subjected to AASHTO specifications moving loads. This procedure is based on using the information about the shape of the ILD's and recognition of their patterns for various members of a bridge truss. This information may be obtained through numerical machine experimentation for any given type of truss, This approach has been applied to different types of bridge trusses, that is Pratt, Parker and K trusses. Heuristic rules have been developed for finding the maximum compression and tensile forces in the members of these types of trusses based on their *Professor