高強度コンクリートを使用したRC架構の火災時耐力に関する解析的研究

概要

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This paper describes an analysis method to estimate fire resistance performance of reinforced concrete structures with high-strength concrete subjected to a compartment fire. The load sustaining capacity of reinforced concrete columns deteriorates under high temperature due to spalling of concrete cover followed by softening of reinforcing steel. In the practical fire design for reinforced concrete columns, horizontal force induced by thermal expansion of connecting beams should be estimated precisely as well as axial force. Heat transfer and thermal stress analyses are conducted for a reinforced concrete column and a partial frame using high-strength concrete (80N/mm^2) with disregard to concrete cover. Based on the analysis results, structural behavior of the reinforced concrete frame subjected to three-hour fire is discussed focusing on the axial load-carrying capacity of the columns.
一般社団法人日本建築学会の論文
2003-03-20