• Fire Science and Engineering
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• v.26 no.6
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• pp.64-71
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• 2012

The fire resistance test has been conducted under the standard fire & loading conditions to evaluate fire resistance performance, according to applying to methods of the lateral confinement reinforcement by prestressed Wire Rope and fire resistance reinforcement by Fiber-Cocktail and load ratio for high strength concrete column. The test result, for 60 MPa high-strength concrete column, It was indicated that applying to the wire rope has improved axial ductility in the fire condition, and fire resistance performance has been enhanced by more than 23 %. In addition to this, in case of applying the wire rope to 60 MPa high-strength concrete column, load can be judged that about 70 % of designed load is appropriate. If the Wire Rope and Fiber-Cocktail is applied to 100 MPa high-strength concrete column, It was shown that the fire resistance performance was enhanced by 4 times as much as applying only hoops.

• 한국도로학회지:도로
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• v.17 no.4
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• pp.47-55
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• 2015

• 방재와보험
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• s.114
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• pp.54-57
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• 2006

각종 건축물에 사용되는 칸막이가 적합하고 올바르게 설치되었을 때 건물 내 거주자는 안전하게 생활할 수 있을 것이다. 때문에 많은 칸막이 제조업체들은 칸막이 설계에 대한 광범위한 연구개발을 수행하고 있다. 유럽에서는 '비내력 벽체로 사용하기 위한 내부 칸막이 용구' 로 정의되는 내화 비내력 칸막이에 대해 알아본다.

• Journal of Korean Society of Steel Construction
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• v.19 no.2
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• pp.181-190
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• 2007

A fire-resistant steel with enhanced load-bearing capacity has been developed to enable structural elements such as columns and beams withstand exposure to severe fire conditions. To precisely evaluate the fire-resistant performance of structural elements that compose fire-resistant steels, mechanical properties such as yield strength and elastic modulus are essential. To obtain the mechanical database of fire-resistant steels at high temperatures, tensile tests at high temperatures were conducted on steels of two kinds of thicknesses. The results showed that the thickness difference could not affect the mechanical properties at a high temperature.

• Fire Science and Engineering
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• v.17 no.2
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• pp.10-16
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• 2003

The main purpose of this study is to raise the point at issue and to propose reform direction about the current performance criteria of fire resistance through the examination of the fire resistance required for each use of compartment by using performance-based fire safety design method. To examine the performance criteria of fire resistance, this study compared the equivalent time of fire exposure which was calculated by using time-equivalent formulae with the required fire resistance time determined by existing prescriptive code, and surveyed factors such as the fire load energy density, ventilation factor, fire compartment materials and fire compartment geometry in order to calculate the equivalent time of fire exposure.

• Fire Science and Engineering
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• v.27 no.6
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• pp.26-31
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• 2013

This study, to evaluate the technology of the fire resistance design of Reinforced Concrete columns based on fire resistance performance design, was suppose to use as basic data for performance design through a measure of temperature and deformation using heat transfer analysis and Heat-load test of the Reinforced Concrete columns as parameter is the axial load ratio. In accordance with axial load without eccentricity, the load ratio of 0.30, 0.35, 0.40 and 0.47 were imposed on columns. As a result of this study, 0.40 or more of axial load ratio can be ensured that the fire resistance performance was considered satisfactory.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.04a
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• pp.351-356
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• 2011

본 연구에서는 국외 커튼월 내화 Code인 EN 13830, EN 13501-1, EN 1364-3을 사용하여 알루미늄과 스틸프레임에 대해 화재시 최적설계조건 도출을 위한 실험을 실시하였다. 현재 국내 커튼월의 내화 법규는 2008년 '내화 충전구조 세부 운영지침'에서 조인트 부분에 대해서만 내화규정이 정립되어 있다. 따라서 본 연구에서는 EN 13830과 그 하위법을 이용하여 알루미늄과 스틸 커튼월의 최적설계조건 도출을 위한 실험을 실시하였다. 실험 결과 차염성은 알루미늄 커튼월과 스틸 커튼월의 성능시간이 각각 10분 26분으로 약 16분의 차이가 발생하였고, 차열성은 알루미늄 커튼월과 스틸 커튼월이 최고온도에서 6분과 9분으로 약 3분정도의 차이를 보였고 평균온도에서는 9분, 24분으로 약 15분의 차이를 보였다. 그리고 복사열은 성능기준 $15Kw/m^2$를 통과하는데 알루미늄 커튼월은 16분 스틸 커튼월은 24분을 기록하였다.

• Journal of Energy Engineering
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• v.8 no.1
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• pp.67-75
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• 1999

여러 종류의 내화재로 구성된 석탄가스화기에서의 온도분포 및 열손실량을 구하기 위한 전산해석을 수행하였다. 석탄가스화기 내화재 설계를 위한 적절한 방법론을 제안하기 위하여 1차원 이론적 해석, 2차원 전도열전달 해석 및 3차원 대류-전도 복합열전달 해석 등 세가지 방법론으로 해석을 각각 수행하였다. 해석 결과들은 석탄가스화기 실험 결과와 정상적 정량적으로 잘 일치하는 것으로 나타났다. 결과의 정확성, 수치해석 상의 수렴성 및 계산시간 등을 종합적으로 고려해 볼 때, 전산해석에 핵심 경계조건인 가스화기 내벽의 온도를 적절히 설정할 수 있는 경우에는 2차원 전도열전달 해석이 공학적 설계에 적용하기 알맞은 방법론으로 판단되었다. 전산해석 결과에 의하면, 현재 실험이 진행중인 하루 3톤 처리 용량급의 석탄가스화기에서의 총 열손실량은 설계치 운전 기준으로 약 1% 정도인 것으로 판별되었다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.18 no.3
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• pp.28-39
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• 2014

This paper reviews past literatures relevant to fire-resistance properties of high strength concrete and investigates spalling mechanism of high strength concrete in fire. First, literatures were reviewed on spalling occurrence and fire-resistance methods. Second, a chemical change of concrete components in an elevated temperature was presented. Finally, the mechanism of the spalling occurrence and spalling resistance were examined in terms of hybrid fiber content. The focus of the experimental study as part of this research is to investigate the effects of fire on the variation of thermal properties of high strength concrete, which tends to be used in super tall buildings. This experimental study was devised to investigate the fire-resistance performance of high strength concrete containing hybrid fibers. A total of 48 test specimens were exposed to high temperature ranging from $100^{\circ}C$ to $700^{\circ}C$, including room temperature (${\sim}20^{\circ}C$). Test results provide valuable information regarding fire-resistance properties of strength concrete with 100 MPa or greater.

• Journal of the Korea institute for structural maintenance and inspection
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• v.10 no.2
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• pp.83-90
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• 2006

A spalling is defined as the damages of concrete exposed to high temperature during the fire by causing cracks and localized bursting of small pieces of concrete. It is reported that spalling is caused by the vapor pressure and polypropylene(PP) fiber has an important role in protecting from spalling. The characteristics of fire resistance of high-strength reinforced concrete columns with various concrete strength and various contents of PP fiber were investigated in this study. In results, the ratio of unstressed residual strength of columns increases as the concrete strength increases and the ratio of unstressed residual strength of columns exposed to fire decreases as the content of PP fiber increases from 0% to 0.2%.