A review of moment distribution and its use in solving multi-story frames



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This thesis presents the history of the development of the moment distribution procedure and its impact on the solution of statically indeterminate beams and frames. The basic procedure, and both approximate and exact methods of analysis are presented, and then a series of nine single bay laterally loaded frames varying in height from two to ten stories is solved using the statics ratio method. The results of this work are then presented in tabular form from which certain significant observations and conclusions were obtained, most notable of which was that use of the statics ratio method is a rapid means of solving a multi-story frame. Furthermore, the pattern of final correct moments and the relationship between these and the product of the story height and shear, permits accurate prediction of the final correct moments for a frame without doing any moment distribution at all. The results are such that further investigation of the procedure is merited and recommended.