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Post-Earthquake Fire Resistance of Circular Concrete-Filled Steel Tubular Columns
| 题名： | Post-Earthquake Fire Resistance of Circular Concrete-Filled Steel Tubular Columns |
| 正文语种： | 英文 |
| 作者： | J. H. Wang, Aff.M.ASCE; S. Kunnath, F.ASCE; J. He;Y. Xiao, F.ASCE |
| 作者单位： | Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering;Univ, of California;Nanjing Tech Univ |
| 关键词： | Concrete-filled steel tubular (CFST) column; Fire resistance; Residual seismic capacity; Seismic resistance |
| 摘要： | An experimental study was conducted to investigate the mechanical behavior and residual capacity of concrete-filled steel tubular (CFST) columns subjected to a post-earthquake fire. Nine circular cantilever CFST columns, including two control specimens, were tested to investigate their post-earthquake fire resistance time. The residual seismic behavior and load carrying capacity of an additional four columns were also studied following post-earthquake fire. All specimens were first subjected to a reversed cyclic or simulated earthquake loading (to induce initial seismic damage) and were then heated to obtain the fire resistance time or were subjected to additional cyclic reversed loading after a post-earthquake fire. The experimental results indicate that the CFST columns generally performed well after a post-earthquake fire. Specimens with high compressive strength concrete exhibited longer post-earthquake fire resistance times, whereas the increase in tube wall thickness only had a marginal effect on improving post-earthquake fire resistance. More importantly, the presence of residual lateral drift at the end of the earthquake loading had a much more significant effect on the post-earthquake fire performance than specimens without residual deformation. Finally, it is recommended that the failure criterion for fire loading should possibly take into consideration lateral deformation limits during fire testing. |
| 出版日期： | 2020 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.146 |
| 期： | No.06 |
| 页码： | 04020105 |
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