무내화피복 CFT 공법의 내화성능 확보를 위한 실험적 연구 = An Experimental Study on the Ensuring the Fire Resistance Performance of Non-Refractory Coating CFT

국문 초록 (Abstract)

본 연구는 3시간 내화성능을 만족할 수 있는 고성능 무내화피복 CFT 기둥 개발을 위한 연구로서, 고로슬래그 미분말 치환율에 따른 성능평가를 실시한 결과 고로슬래그미분말 치환율이 증가함에 따라 내화성능이 개선되는 것을확인 할 수 있었으며, 내화성능을 고려한 CFT 기둥용100MPa 충전콘크리트의 고로슬래그 미분말 적정 사용량은 40%로 나타났다. 이에 따라 고로슬래그 미분말 40% 혼입 100MPa 충전콘크리트를 적용한 CFT 실물 시험체를대상으로 재하하중별 내화시험을 실시한 결과 재하하중이증가함에 따라 내화성능 발현시간이 감소하는 것으로 나타났으며, 재하하중 2,000kN에서는 240분 이상의 내화성능을 나타내었고, 3,000kN에서는 184분, 4,000kN에서는120분의 내화성능을 나타내었다.

다국어 초록 (Multilingual Abstract)

In this study, tests were carried out to find out a method to ensure the fire resistance performance ofhigh-performance non-refractory coating CFT columns. For the high performance concrete fabrication with 100MPa,blast furnace slag(BS) and steel and nylon fibers were used. It was found that the partial replacement with BSimproved the fire resistance performance of the concrete. Based on the results of lab tests, the large fire test wasconducted. For this test, the CFTs with the size of ∅500×4,200mm and the reinforcement of SS 400 steel wereprepared and they were subjected to a loading condition. It was found that as the level of load increased, the level offire resistance decreased. For example, In with the loading condition of 2000kN the CFT could resist the fire for over240 minutes, whereas, with the loading condition of 3,000kN and 4000kN applying to equivalent CFTs, the resistingtime against fire were 184 minutes, and 120 minutes, respectively.

참고문헌 (Reference)

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