Estabilidade em edifícios de concreto armado com pavimentos em lajes planas
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2007-08-24Autor
Cicolin, Luiz Antonio Betin
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This present work covers possible manners of evaluating steel concrete frames designed for
multiple flooring buildings as far as instability and necessity of second order efforts are
concerned. Starting from single floor projects with simple flat slab frame, models with
different numbers of floors are considered. The models do not use large rigidity elements
such as staircases and lift shafts. The modeling used in this piece adopts simplified criteria
for vertical action dimensioning, forming frames with flat slab layers taken as low height
beams. These models are evaluated. Based on the results, the work analyzes the
application validity of criteria to dismiss consideration of the NBR6118:2003 code
presented second order global effort, and compares this against the P-∆ process utilization.
Results both with and without inverted beams at the periphery are compared.