The Influence of The Interaction of Soil And Structure on Rein forced Concrete Tall Buildings With Flat Slabs And Internal Resistant Core of Tube in Tube System With Consideration of Nonlinear Dynamic Analysis

In this study, 2 reinforced concrete 3D building frames for a 28-storey building are going to be considered and analyzesThese frames are in both X andYdirections with tube in tube structural system and a flat plate roof with rigid internal core in the shape of H, in a relatively high risk zone (A=0.3 g) on two kinds of soil, with and without soil-structure interaction.The goal of this study is to determine the maximum drift and displacement of the storeys under gravity loads(dead  live) and lateral load of earthquake. A discrete model based on a buried footing Cone Model in homogeneous half space of volf and meek is used to model the soil under the foundation and also to determine dynamic stiffness coefficient and Soil damping cofficient and a substructure method with the footing rigidity assumption is used to analyze the frames with the soil-structure intraction  effect. A dynamic analysis of the nonlinear timeline history of seven accelerograms is used to analyze earthquake load and geometric modeling of all  frames with internal core has been done in sap2000-V17software.The results show that the maximum drift and displacement of the storeys with soil-structure interaction in X and Ydirection was not different with the one without interaction and that they are equal. By changing the type of soil with and without soil-structure interaction, the maximum drift of storeys in X direction had a descending increment process of 22 percent and in Y direction, had 25 percent is increment.