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Abstract The work presented in this thesis is aimed to study [he effect of rigidity of ground tie beams which connect foundation footings on the differential settlement between footings, and to calculate the straining actions in such beams. The method 0/ analysis was considerable as accurate, reliable as possible and easy for structural engineers to be applicable in the practical problems. The models are chosen to examine the different factors which affect the analysis and relations have been established between them too. The study of influence line of settlement was very importantfor the analysis, New sets of tables for influence line of settlement are established considering the dimensions offootings it self The equations which model the IL. are also examined, addition to the effect of the constants of the equations on the B.N! in tie beam and differential settlement between footings. Many models have been examined to study the effect 0/ the different parameters on [he results, relationships have been. established |