Evaluation of the redistribution of loads in the foundations of reinforced concrete structures from the computational modeling of the construction sequence

Resumo

The aim is to analyze the loads on columns on a reinforced concrete building considering elastic
behavior with instantaneous loading and gradual loading (construction in 3 stages). The finite element commercial
program SAP2000 (version 15) with staged construction module was used. Time analysis is carried out
subsequently, considering instantaneous loading and construction in 3 stages. Staged construction allows the
consideration of creep and shrinkage of concrete. Concerning elastic analysis with instantaneous loading in 3
stages, it was found that a redistribution of loads on columns took place even when normal stress value is low.
Therefore, the significant influence of the construction sequence on the redistribution of loads on reinforced
concrete structures is highlighted. Further research is required to investigate the influence of masonry, coatings,
occupancy overload and structural elements (especially beams and columns) of variable stiffness. No redistribution
of loads was observed in the analysis carried out over time (creep and shrinkage). This result may be related to
structural simplicity.