Interaction diagrams for reinforced concrete sections subjected to fire

被引：30
作者：
Caldas, Rodrigo Barreto [1 ]
Sousa, Joao Batista M., Jr. [2 ]
Fakury, Ricardo Hallal [1 ]
机构：
[1] Univ Fed Minas Gerais, Dept Struct Engn, BR-31270901 Belo Horizonte, MG, Brazil
[2] Univ Fed Ouro Preto, Escola Minas, Dept Civil Engn, BR-35400000 Ouro Preto, MG, Brazil
来源：
ENGINEERING STRUCTURES | 2010年 / 32卷 / 09期
关键词：
Fire engineering; Reinforced concrete; Cross-section; Interaction diagrams; RESISTANCE; COLUMNS; CALCULATE; DESIGN;
D O I：
10.1016/j.engstruct.2010.05.002
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Strength interaction diagrams are common tools for reinforced concrete (RC) cross-section analysis and design. They usually relate the ultimate values of the bending moments and axial force, allowing quick assessment of a cross-section's strength. Under fire action, however, substantial changes occur on the behavior of the cross-section, and these diagrams become strongly dependent on the temperature field, which introduces thermal strains and modifies the stress-strain relationships. The purpose of this paper is to present an algorithm for the construction of strength interaction diagrams for arbitrary-shaped RC sections subjected to fire action. The diagrams are obtained by a stepwise variation of the deformed configuration, under assumptions of conventional ultimate strain values for concrete and steel. The procedure is illustrated by the construction of interaction diagrams for some RC sections subjected to different temperature distributions. (C) 2010 Elsevier Ltd. All rights reserved.
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页码：2832 / 2838
页数：7
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