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Abstract The study of the interaction of frame-shear wall structures with foundation occupied the attention of many investigators during the last decades. The intent of this thesis is to perform deterministic and probabilistic analysis of frame-shear wall raft soil mass system, as a quite general form. In the deterministic analysis, an attempt has been made to consider the influence of elasto-perfectly plastic characteristics of soil in soil-structure interaction analysis of space frame-shear wall structures taking into account the concrete strain softening. The generalized FE program COSMOSIM is used for the interactive analysis of 12-story space frame-shear wall-raft-soil system under (wind load and own weight). The results of the interactive analysis are compared with those of non-interactive earlier analysis. Furthermore, the effect of interface element, raft rigidity, and sand stiffness on the distribution of the normal and, shear stresses in the structure, contact pressure, and differential settlement of the foundation is investigated in detail. Moreover, the accuracy of the 3-D and 2-D models of analysis is discussed. It was found that introduction of interface element has an appreciable influence in the distribution of normal stresses along the base of the raft under (wind load and own weight); however, under real loading condition (dead load, live load and wind load) the effect of interface element is immaterial. The flexible raft affects mainly the stresses at the lower portion of the framewall super-structure. The total settlement of medium-sand supported |