Abstract
Abstract: The influence of incremental constructive effects (IE) and soil-structure interaction (SSI) on high-rise buildings of reinforced concrete with shallow foundations on sandy soils were analyzed. IE and SSI evaluations were carried out by the parameters of global instability, maximum horizontal displacements, foundation loads, and settlements of a symmetrical and non-symmetrical plant of a 23-storey building For the analysis of the IE, the variation of the modulus of elasticity was considered over time along with the phases of application of loads in the building. For ISS analysis, the continuous medium was considered, and the calculation model considers a multi-spring-mass system under the foundation of the building. The results show a significant redistribution in the foundation efforts and suggest that a failure in considering these effects along with the structure can lead to projects that do not meet the standard specifications regarding stability parameters and overall structure displacements.
Highlights
With use of expensive land located in the central area of Brazilian cities, a verticalization is observed with the frequent construction of tall buildings with more than 20 stories high
7 CONCLUSIONS The objective of this paper was to evaluate the influence of Incremental Effect and Soil-Structure Interaction on overall stability analyses of a reinforced concrete structure with shallow foundations on sandy soils
In general, the use of soil-structure interaction (SSI) presented more relevant variations, showing to be the most complex tool and requiring more attention from the designer, which is in agreement with the studies of Alves and Feitosa [12] and Marques et al [19], which draw attention to the variations found in the parameters analyzed
Summary
With use of expensive land located in the central area of Brazilian cities, a verticalization is observed with the frequent construction of tall buildings with more than 20 stories high. The analysis of the load redistribution in the. C. Alves structure, as well as the structure overall stability evaluation, become important in the building conception, since it ensures the safety of the structure through the loss of its resistant capacity caused by the increase of deformations due to actions on the building
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