substructureing method for analysis large scale regid frames using force method

in this paper by using concepts of graph theory, forces method and substructure ing method for analysis of structures, some methods have been introduced for optimal analysis of structures in a large scale, using substructuring method. planar rigid frames assuming linear behavior and small deformations, have been optimal analyzed, by using forces method. thus, a fortran power station computational software called force has been provided. large scale planar rigid frames are analyzed assuming linear behavior (without considering p-δ effect etc). thus, a fortran power station computational software called subframe has been provided.