Abstract
Abstract In this paper it is presented how the influence of soil-structure interaction (SSI) interferes on reinforced concrete structures in small buildings with deep foundations, with the objective of analyzing the influence of SSI on the loads and repressions, global stability and costs of materials. The analysis were based on numerical-computational simulations of a commercial building using CAD/TQS commercial software. The building was simulated with 4, 6 and 8 floors with 3 different profiles of soils, generating 8 case studies. When considering SSI, the loads and repressions did not present significant variations and the parameters of global instability were within the normative recommendations. Among the variables analyzed, the material cost of the structure was the least affected item with the SSI consideration.
Highlights
According to standard NBR 6122 of the Brazilian Association of Technical Standards [1], the soil-structure interaction is the structural analysis mechanism considering the deformability of foundations in conjunction with the superstructure
According to Gusmão [15], soil-structure interaction (SSI) is not considered in most structural designs, i.e., the columns of buildings are treated as having unmovable supports
Since SSI studies of small structures with deep foundations are scarce, the objective of this paper is to study the behavior of the infrastructure, superstructure and the variation of the material costs for foundations, beams, columns and slabs of a reinforced concrete building that takes SSI into account
Summary
According to standard NBR 6122 of the Brazilian Association of Technical Standards [1], the soil-structure interaction is the structural analysis mechanism considering the deformability of foundations in conjunction with the superstructure. According to Gusmão [15], SSI is not considered in most structural designs, i.e., the columns of buildings are treated as having unmovable supports. In addition to being an interdisciplinary field, the main reasons for not considering SSI in designs involve the limited time available for computational simulations at the design level, in addition to the difficulty in performing numerical simulations. It is, important to develop research that demonstrates the behavior of structures of different sizes, with different types of foundations, when SSI is considered. This previously-described behavior of loads, settlements and global stability represents the general trend or behavior in most studies on SSI
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