• Fire Science and Engineering
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• v.30 no.2
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• pp.49-55
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• 2016

It is necessary to obtain a fire resistance certification in order to use Fire Protection Coating in Korea. According to the fire test standards, columns have four heating sides and beams have three. In comparison with columns which are heated four sides equally, beams have three exposed sides and one unexposed up side. So the question arises as to there were the differences between the temperature of up side and others of beams in fire test. The purpose of this study is to consider the positions of thermocouples for beams through a comparative analysis of the temperature data obtained from fire certification tests.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.36 no.2
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• pp.137-145
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• 2023

This paper presents the effects of fire-resistant materials on the temperature and vertical deflection of a composite beam exposed to fire through nonlinear thermo-mechanical analysis. The fire was modeled using the standard fire curve proposed in American Society for Testing and Materials (ASTM) E119. Fire-resistant materials were modeled by reducing the heat transfer coefficient from the air layer to the beam. The temperature and vertical deflection of the uncoated composite beam were measured using a laboratory fire test, and the results of the structural fire analysis were verified through comparison with experimental results. By introducing the fire-resistance effect, the reduction in the temperature and deflection of the beam for the ASTM E119 standard fire can be reasonably estimated. Based on a case study of the heat transfer coefficient, the fire-resistant effect on the thermo-mechanical response of a composite beam in the event of a fire is presented.

• Journal of the Korea institute for structural maintenance and inspection
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• v.14 no.4
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• pp.78-85
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• 2010

When the fire occur, concrete filled steel tube(CFT) columns expected to form a much distinction in a fire resistance performance according to a kind of fire protection because the steel surface is directly exposed to high temperature. In this study, an experiment by three factors which were kind of fire protection, thickness of protection and time was performed to get the characteristics of temperature distribution types of CFT column with fire protection. As the result of this study, on a basis of heating temperature, spray protection was the most superior in a fire resistance performance, fireproof paint was next, and without fire protection was most inferior. In a heating time-location relationship, the temperature increased slowly on the surface of the concrete, but the temperature increased sharply on the surface of the steel.

• Journal of Korean Society of Steel Construction
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• v.22 no.6
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• pp.523-532
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• 2010

Concrete-filled square steel tube (CFT) columns have inherently high fire resistance and load-bearing capacity. Nevertheless, it is sometimes necessary to improve their fire resistance using external fire protection. This paper presents the experimental results of the temperature distribution of CFT columns with fire protection. A fire load test was carried out by exposing small-scale specimens to heat in an electric furnace that was especially built for testing loaded columns. The temperature distribution of CFT columns under constant axial loads was determined, as were its significant parameters, such as the types of fire protection and thickness, the thickness of the square CFT, and the fire duration times. The results of this study showed the temperature distribution of each specimen of the electric furnace and the temperature distribution properties of concrete and steel. In addition, the axial displacement and local buckling behavior of CFT columns based on temperature changes was observed.

• Proceedings of the ESK Conference
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• 1994.04a
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• pp.107-112
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• 1994

철강구조물들이 화염에 노출될 경우 그 강도가 급격히 저하되어 화재시 건물자체가 붕괴되는 대형재해를 유발할 우려가 있다. 따라서, 화재시 그 내부의 철강구조에 열전달을 차단해 조기붕괴 를 막고 소화가능시간을 늘인다는 점에서 우수한 내화피복제의 개발은 중요한 과제라 하겠다. 융해성 규산염에 기초한 무기질 방화 피복제들은 불에 누출될 때 포비하거나 팽창하는 성질이 있으며화염에 대해 독성물질의 방출이 적을 뿐만 아니라 공급면에서도 풍부하다. 본 연구에서는 이러한 Potassium- 규산염 피복제들의 몰비율의 변화에 따른 열특성, 용해도, 결정구조 및 포비도 등이 내화 피복제의 물리적 특성과 화학적 성질에 미치는 영향을 검토하였다.

• Journal of Korean Society of Steel Construction
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• v.21 no.1
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• pp.27-35
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• 2009

Main structural steel members need fire-resistance measures to ensure their fire-resistance performance for a prescribed time. This paper analyzes and evaluates the fire-resistance performance of approved Korean fire-protection products for steel columns. These products are classified into products for board protection and for spray protection, samples of which were selected for the analysis. The fire-resistance performance was analyzed on the basis of Korean and European standards. The Korean standards are considered additional to the Euro-code standards for performance design. The Korean standards generally take more precautions to ensure safety on the temperature side, but require the reflection of material properties, the steel temperature calculation methodology, the profile factor, and the strength verification in a fire.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.11a
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• pp.115-118
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• 2011

본 연구에서는 현재 법정내화구조로 규정되어 있는 철근콘크리트(RC: Reinforced concrete)조 및 철골철망모르타르(SWM: Steel & Wire Mortar)조 슬래브에 대하여 재하조건에서 구조별 내화성능을 검토하고, 철골철망모르타르조 슬래브에 대해서는 피복두께별 내화성능을 검토하고자 표준화재조건에서 내화실험을 실시하였다. 실험결과 동일피복 두께일 경우 철근콘크리트조 슬래브가 내화성능이 우수한 것으로 나타났으며, 철골철망 모르타르조 슬래브의 경우 피복두께가 10mm 증가 시 7%의 내화성능이 향상되는 것으로 나타났다. 가열 이면온도는 슬래브의 두께가 늘어날수록 낮은 것으로 나타났다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2010.10a
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• pp.297-301
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• 2010

일반콘크리트 기둥을 대상으로 콘크리트 피복두께와 단면크기를 변수로 하여 내화성능을 평가하였다. 피복두께가 늘어남에 따라 내화성능시간도 다소 늘어 피복두께와 내화성능은 비례적 관계에 있는 것으로 나타났다. 단면크기가 커짐에 따라 실험체의 열용량이 증가하여 내화성능이 좋아질 것으로 예상하였으나 폭렬의 영향으로 인하여 단면크기에 따른 내화성능의 변화는 큰 의미가 없는 것으로 나타났다. 따라서 콘크리트 기둥의 내화성능은 폭렬 여부에 의해 크게 지배되는 것으로 판단된다.

• 방재와보험
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• s.63
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• pp.18-21
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• 1994

• Fire Science and Engineering
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• v.24 no.1
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• pp.81-89
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• 2010

In general, fire resistance is determined through the building' uses and stories. But recently a fire engineering design that is done by the calculation of design fires from the fire cell and an evaluation of stabilities for structural behavior at fire condition have applied to almost of countries as a major alternative against a prescriptive fire design. To adopt and utilize the fire engineering design into Korea, at first, we evaluated structural stability of 21st stories steel residential building at fire condition through fire engineering design and secondly the fire protection cost was analyzed with fire engineering design method and the prescriptive one, respectively. No fire protection materials for satisfaction of building law at structural members such as columns and beams were needed and about 90 % of fire protection cost was saved.