METHODS FOR SIMULATING SOIL-STRUCTURE INTERACTION IN A 100-METER-TALLING BUILDING.

Abstract

The effect of stress redistribution that occurs because of settlement is an important factor to be analyzed in highrise buildings. To consider them, it is necessary to include in the structural analysis the effect of soil-structure interaction (SSI). In this research, the effects of ISE in a 100 m high building on compressible soil strata are analyzed through two methods, direct and indirect; and the non-consideration by rigid supports, to obtain the variation in horizontal displacements, settlements, column internal forces and axial load on the piles in the models with and without SSI. To represent the SSI by the direct method, interface elements are created between the soil and the foundation. On the other hand, by incorporating springs and providing the subgrade reaction modulus, the SSI is taken into account by the indirect method. The results show that the SSI has a considerable effect on the increase of the horizontal displacements, causes an increase of the interior forces of the columns, the variation in the axial force in the piles is evidenced as a result of the action of the friction force and it is verified that by using the direct method a better representation of the behavior of the structure is achieved since it allows analyzing the joint work of the elements that make up the foundation and the soil, while in the indirect method these elements work individually.