The study concluded that Bending Moments: the positive bending moments on the connections region between the flat plate (raft) and the walls will be increased when the wall depth and thickness increased, the negative bending moments within the foundation will be decreased when the wall depth and thickness increased, on line C the bending moments approaching to zero value when the wall thickness increased, while it will be changed to positive values when the wall depth increases. , the numerical analysis carried out as parametric studies to investigate the advantages and the effects on bending moments, total displacements and differential settlements. Box foundations consist of two parts: 1-the upper part is reinforced concrete slab, 2-the lower part is reinforced concrete wall penetrated in the supported media.
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