Behavior of CFT Beam-Columns Under Elevated Temperatures From Fire Loading

Behavior of CFT Beam-Columns Under Elevated Temperatures From Fire Loading
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DOI：
10.1061/40753(171)52
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发表时间：
2005-04
期刊：
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影响因子：
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通讯作者：
Sangdo Hong;A. Varma
Sangdo Hong;A. Varma
中科院分区：
其他
文献类型：
--
作者：
Sangdo Hong;A. Varma

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An analytical approach consisting of three sequential analytical steps, namely, fire analysis, heat transfer analysis, and stress analysis was developed for predicting the behavior of square concrete-filled steel tube (CFT) beam-columns under elevated temperatures from fire loading. Analytical models were developed for each of these analysis steps. These included 3D finite element models for nonlinear heat transfer and stress analysis. They were further used to analytically investigate the fundamental moment-curvature-temperature (M- theta-T) behavior of CFT beam-columns subjected to combined axial, standard fire (thermal), and flexural loading. The effects of thermal insulation, axial load level, steel tube width (b) and width-to-thickness (b/t) ratio on the on the moment capacity and M-theta behavior of CFT beam-columns were evaluated.