Abstract
Abstract The paper presents some results from Rosa’s [1] research that aimed to verify the effect of creep and shrinkage of the concrete in soil-structure interaction. The construction consists in a 17 storeys building. It is set down on shallow foundation, in the central part of the construction, and steel piles, on the boundary. The structure was submitted to instrumentation during construction, including the monitoring of foundation settlements and columns deformation. It was possible to compare the structural design with a numerical refined structural analysis. Comparisons of the structural and foundation design with and without due consideration of soil-structure interaction are also presented. Finally, the different design assumptions were confronted with instrumentation results, both related to foundation settlements and to columns loading as well. Attention is pointed out on the effect of concrete creep and shrinkage in the soil-structure interaction analysis.
Highlights
Of the last review of ABNT NBR 6122 [2] Foundation Rule, it is recommended that “In structures where the deformability of foundations can influence the distribution of stresses, the soilstructure interaction or foundation-structure interaction must be considered in design”
The structure was submitted to instrumentation during construction, including the monitoring of foundation settlements and columns deformation
The different design assumptions were confronted with instrumentation results, both related to foundation settlements and to columns loading as well
Summary
In the case of structures settled on mixed foundations, which are those including some columns founded on shallow foundation and other columns resting on deep foundation, the soil-structure interaction assumes a relevant premise in design. This paper includes part of Rosa’s doctoral research [1] consisting of the analysis of a building in mixed foundations submitted to settlement instrumentation and monitoring of the stresses and the deformation of some columns during the complete construction process. The settlements magnitude and its distribution in the foundation plant were estimated based on a consistent soil model. Due to the consistent soil and structural model adopted in design, it was possible to establish a comparison of the predicted and the measured behavior of the soil structure interaction. The effects of creep and shrinkage of the concrete on soil-structure interaction have been interpreted
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