Avaliação da consideração de impacto acidental de veículos em pilares de concreto armado conforme ABNT NBR 6120:2019

Abstract

The new ABNT NBR 6120:2019 brought many updates regarding the loads to be adopted in building structure projects. One of the points of significant alteration was the inclusion of the need to consider the accidental impact of vehicles on parking lots, garage floors or structures near to roads with vehicle traffic, beyond the division of loads to be considered according to the classes of vehicles circulating in the local. Due to the recent update of the standard, the TQS software has implemented the functionality of load due to the impact of vehicles in its latest version, V23. The present work aims to analyze the difference in efforts and dimensioning of a column subject to the accidental impact of vehicles compared to a conventional column using the TQS, in addition to verifying the way that the program considers this load. The object of study consists of a simple building composed of nine columns, spans between axes of 5 meters, beams locking all the pillars in both directions, at the top and at the base and the height between floors is 3.5 meters. Two identical models were designed, with the horizontal force corresponding to the impact of a Category I vehicle being applied to the central pillar of one of them. From the results obtained, comparisons were made between the efforts and reinforcement rates, in addition to, from the effort diagrams, seeking to find the form of the increase of the load in the structure considered by the program. As expected, reinforcement rates have increased considerably. As for the consideration of the effort by the TQS, for the tested model, it was proved that a model of double-supported bars is used.