日本建築学会技術報告集
Online ISSN : 1881-8188
Print ISSN : 1341-9463
ISSN-L : 1341-9463
スパイラル筋補強された高強度コンクリート充填鋼管柱の耐火性能実験
杉田 和直道越 真太郎西垣 太郎
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ジャーナル フリー

2000 年 6 巻 10 号 p. 121-124

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抄録
The purpose of this paper is to make the influence of spiral reinforcement clear on the fire endurance of CFT columns without fire protection experimentally and to formulate relations between the load bearing capacity and heating time. The following findings were obtained from the test results. 1) Relations between the quantity of spiral reinforcement, axial force and fire resistance time were cleared, and the formula considering the spiral reinforcement for load bearing during fire was made. 2) When axial force ratio is under 0.5, the lower the axial force ratio is, the better fire endurance of CFT columns with spiral reinforcement is. When axial force ratio is over 0.6, spiral reinforcement has no effects on fire endurance. 3) When axial force ratio is 0.3-0.5, CFT columns with spiral reinforcement maintain load bearing capacity under fire for over three hours without fire protection.
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© 2000 日本建築学会
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