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Research Article

A simplified method for analysis of reinforced concrete beams exposed to fire situation

Marcelo Mesquita do Amaral1, Matheus Wanglon Ferreira2, Mauro de Vasconcellos Real1

1Engineering School, Federal University of Rio Grande, Brazil                                                             2Department of Civil Engineering, Federal University of Rio Grande do Sul, Brazil                                                                                                                              

Keywords

Abstract




Flexure design;

Beam;     

Reinforced concrete;    

Harbor structures;

Fire scenario

The reinforced concrete structural design consists in determining the structural members dimensions, steel ratio and location of steel rebars so that a limit state is not reached. Currently, when considering fire effects, commercial design software, in general, are limited to do the verifications only based on the tabular method, according to ABNT NBR 15200, without considering internal and external forces, so the designer needs to change the dimensions of the concrete section. This fact does not stimulate the use of the Brazilian standard codes since they do not present economic solutions. This paper aims to propose a simplified method to design reinforced concrete beams, of harbor structures, in a fire situation, which allows the implementation in commercial design software. Such proposed simplified method intends to involve structural safety, improves design facilities and economy in construction. Then, through a numerical example, the practical application of the tabular and simplified method was demonstrated. The results obtained by the simplified method were more economical than the tabular method. The calculation models validation was done through a comparative study with values found in the literature, as well as those calculated by the 500 °C isotherm method, and with the software ANSYS results. At the end of this work, it was concluded that the proposed simplified method, besides this being a method that allows an easy application, presents results, in general, in favor of safety; and, withal, allows more economics results when compared with the tabular method. 

© 2019 MIM Research Group. All rights reserved.

LATEST News


21/02/2020 Collaboration for SET 2020: Editorial Board of our journal and Organizing Committee of the 19th International Conference on Sustainable Energy Technologies (SET 2020) have agreed to collaborate. Extended versions of the selected papers from the conference will be published in our journal. For more see Events.


25/12/2019 Most Cited Paper Award: The paper authored by Manoj Sahni and Sanjeev Sharma entitled as “Elastic-plastic deformation of a thin rotating solid disk of exponentially varying density" is awarded the 2019 Most Cited Paper Award of Research on Engineering Structures and Materials (RESM).

25/12/2019 Best Paper Award: The paper authored by Marcelo Mesquita do Amaral, Matheus Wanglon Ferreira and Mauro de Vasconcellos Real entitled as “A simplified method for analysis of reinforced concrete beams exposed to fire situation” is awarded the 2019 Best Paper Award of Research on Engineering Structures and Materials (RESM).


13/11/2019 Data articles as a new type of submision: Editorial Board of our journal have decided to accept a new type of submission: data articles. The focus of these papers is only on data and how it is collected but not on its interpretation and drawn conclusions. For more see News section.


(More details of the news may be given in the News section)


For more see News...

LATEST AWARDS


2019 Most Cited Paper Award:

The paper authored by Manoj Sahni and Sanjeev Sharma entitled as “Elastic-plastic deformation of a thin rotating solid disk of exponentially varying density" is awarded the


2019 Best Paper Award:

The paper authored by Marcelo Mesquita do Amaral, Matheus Wanglon Ferreira and Mauro de Vasconcellos Real entitled as “A simplified method for analysis of reinforced concrete beams exposed to fire situation” is awarded the 


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Last Update:

15.06.2020

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