Open AccessAnálise de uma Estrutura de Concreto Armado e proposição de reforço para correção de falhas estruturais: Estudo de Caso
Author(s) -
Gláucia Nolasco de Almeida Mello,
Bárbara Elisa Ferreira,
Marina R. B. Macedo,
Carolina Sampaio de Oliveira,
Marina X. S. Assis,
Luan G. Matos
Publication year - 2018
Publication title -
principia/revista principia
Language(s) - English
Resource type - Journals
eISSN - 2447-9187
pISSN - 1517-0306
DOI - 10.18265/1517-03062015v1n43p140-151
Subject(s) - structural engineering , deflection (physics) , vibration , modal analysis , finite element method , modal , computer science , materials science , engineering , physics , composite material , acoustics , optics
The reinforced concrete structures degradation even before reaching useful life, is a very recurrent process in buildings, and it is necessary to execute corrective techniques to strengthen the structural elements. Therefore, it is noted that research in this field is very important to civil engineering. Consequently, the present study consisted in performing a static and dynamic analysis of a school building that presented structural flaws to identify the causes of it and propose a rehabilitation solution. Through the static analysis of the structure, performed with the CAD/TQS program, it was verified that the slabs and beams of the building were mostly executed with a thickness lower than ideal and that, in some slabs, the deflection obtained were higher than allowable. Through modal analysis, performed with Altair HyperWorks program, it was verified that the fourth, fifth and sixth vibration modes of the structure did not meet the ELS-VE, since they present natural frequencies between the critical range indicated by NBR 6118 (ABNT, 2014), thus showing the occurrence of excessive vibration. As a result, a rehabilitation solution was proposed, using steel beams, which were calculated according to the methodology of NBR 8800 (ABNT, 2008) and, verified with the aid of Altair HyperWorks program. This methodology for strengthening the concrete structure was verified with the aid of the platform Altair HyperWorks, where it was concluded that the steel beam used are able to solve the problem with the excessive deflection in the slabs without harming the displacements of the beans who support them, maintaining unaltered the natural frequencies.