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Journal of the Korean Society of Hazard Mitigation 2014;14(1):35-42.
Published online February 28, 2014.
프리스트레스 파형웨브 합성보의내화성능에 관한 실험적 연구
조범연, 김흥열, 김형준, 강현, 김강수
Experimental Study on the Fire Resistance Performance of Prestressed Composite Beam with Corrugated Web
Bum-Yean Cho, Heung-Youl Kim, Hyung-Jun Kim, Hyun Kang, Kang-Su Kim
Abstract
In this study, the fire resistance tests were performed on the conventional slim floor beam and the prestressed composite beams with corrugated webs, which is suitable for the long-span structure with a reduction in story height by utilizing the prestress and accordion effect. In the fire test program, the ISO 834 standard fire curve was adopted, and key test variables were effect of prestress, shape of corrugated webs, and thickness of sprayed fire proofing material. All of test specimens showed enhanced fire resistance performances exceeding the expected performance level, and the prestressed composite beams with corrugated webs especially showed the excellent fire performances considering that these specimens had thin fire proofing thickness compared to conventional slim floor specimen.
Key Words: Prestress; Corrugated Web; Slim Floor; Fire Resistance; Composite Beam
요지
이 연구에서는 장경간을 실현하면서 층고절감의 목적을 동시에 달성하기 위하여 개발된 파형웨브가 적용된 프리스트레스트 매립형 합성보와 일반적인 슬림플로어 보의 내화성능평가를 수행하였다. 내화성능 평가실험에서는 ISO 834 표준화재곡선을 적용하였으며, 주요실험 변수는 프리스트레스의 도입여부, 파형 웹의 형상, 그리고 내화피복의 두께였다. 모든 실험체들은 목적한 화재저항시간보다 더욱 향상된 화재성능을 보여주었으며, 프리스트레스가 도입된 파형웹 합성보는 일반적인 슬림플로어 합성보에 비하여 얇은 내화피복을 적용하였음을 감안하면 매우 우수한 화재저항성능을 보여주었다.
핵심용어: 프리스트레스; 파형웨브; 슬림플로어; 내화; 합성보


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