Estudo de caso: viga de concreto armado com furos horizontais transversais

Abstract

The accommodation of horizontal web openings in reinforced concrete beams is commonly performed for passing of pipes and ducts for water supply, sewage, electrical and telephone installations in constructions around the world. These openings lack reinforcing reinforcement, due to modifications that can lead them to reach the ultimate limit state (ULS) and the serviceability limit state (SLS). Thus, the general objective of this work is the bibliographical review of different methods for adding horizontal holes in reinforced concrete beams, focusing on design and detailing of reinforced concrete beam's reinforcing reinforcement, through manual calculations and using of the structural analysis software. The stages of integration of the opening projects with the structural projects in a structural design office are also investigated. The methodological procedure consists of the dimensioning and detailing, using the Süssekind method, of a designed reinforced concrete beam that contains seven transverse horizontal holes. Thus, obtaining frames that withstood the efforts applied to the opening sections of the structural element, both using the Süssekind method and the TQS software. From the study of this beam, it was observed that the method used, in general, obtained larger steel areas than the auxiliary tools of the structural analysis software, with the highest value being 88.97% difference for one of the holes analyzed.