콘크리트충전 각형강관기둥의 내화성능 및 화재 후 구조성능 평가

다국어 초록 (Multilingual Abstract)

Recently, the concrete filled steel tube columns (CFT columns) of various shapes were developed and applied in the field, and structural performance tests and fire resistance tests of the CFT columns were conducted. However, the studies on the post-fire structural performance of the CFT columns coated with fire-resistant material are in need. Therefore, in this study, the fire resistance test and post-fire structural test were conducted on the CFT columns with square-shape steel tube coated with fire-resistant paint. As the result of the fire resistance test, the maximum temperature was from 410 ℃ to 640 ℃, and the maximum section average temperature was from 400 ℃ to 550 ℃. As the result of the post-fire structural test, the ratio of the maximum load to the nominal compressive strength based on the specified design strength was 1.17 on average. Therefore, if the average temperature of the steel material in the event of the fire is about 500 ℃, it will be judged that the strength reduction of the CFT columns after the fire would be not significant.

참고문헌 (Reference)

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