ON THE ADAPTABILITY OF CONCRETE‐FILLED STEEL TUBULAR COLUMNS IN THE LIGHT OF THE POST‐FIRE TESTING RESULTS
通过16根轴心受压空心钢管混凝土柱的火灾后试验，测量其残余承载力和破坏模式，为评估该类构件火灾后能否继续使用提供实验数据。
The objective of this work is assessment of the applicability of the concrete‐filled steel tubular columns for their further maintenance after exposing to fire. The properties of steel and concrete after heating are briefly described, as well as the attributes of the structures indicating temperature reached during the fire. An experimental research on the HC‐FST (hollow concrete‐filled steel tubular) column behaviour under post‐fire conditions was performed. Behaviour of 16 axially loaded HC‐FST columns has been experimentally investigated and the results presented in this paper. The experimental values of the post‐fire resistance were measured and failure mode was determined for 4 axially loaded columns. For the comparison of test parameters, 4 axially loaded HC‐FST columns were tested under normal conditions. In addition, 8 hollow concrete‐filled steel tubular stub columns and 4 hollow concrete tubular stub columns under normal conditions were tested. One of the research objectives was preparing the experimental data for analysis and developing some analytical dependences between different test parameters influencing most significantly the post‐fire resistance of HC‐FST columns.