• Title/Summary/Keyword: Large-Scale Fire Test

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The comparative analysis on Large scale fire tests through FDS simulation (FDS 모델링을 통한 실대화재시험 비교 분석)

  • Park, Kye-Won;Kim, Woon-Hyung;Jeong, Jae-Gun;Im, Hong-Soon
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2008.11a
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    • pp.93-98
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    • 2008
  • On this study, The combustion properties in 3 kinds of sandwich panels based on ISO 13784-1(Room Corner Test for Sandwich panel building systems) using FDS Version 5 modeling method were tested and analyzed. Comparative analysis for those two results between FDS and real tests were made mainly concentrating on heat release rate.

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A Numerical Analysis for Fire Spread Mechanism of Residential Building Fire (주거용 건축물의 화염전파 현상에 대한 수치해석적 검토)

  • Ahn, Chan-Sol;Kim, Heung-Youl;You, Yong-Ho;Kim, Hyung-Jun
    • Fire Science and Engineering
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    • v.26 no.1
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    • pp.31-37
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    • 2012
  • This study is intended to present a computational thermal model for a residential building. As the Performance Based Design is more popular, fire-intensity and fire-load have turned out to be very important factors for building design and can be predicted through some computational work. To predict and estimate the fire properties of a residential fire, we made some numerical models of combustibles and residential building. In a bid to validate the estimate values, computational analysis results from numerical models were compared with real fire tests. For computational analysis, the Fire Dynamics Simulator (FDS) was used with Large Eddy Simulation (LES) model for turbulence. Consequently, fire-intensity was well predicted and flash-over of rooms were successfully estimated.

Characteristics of Protein Foam Agent by Stabilizer on the Ship Fire Extinguishment (선박화재 적용 단백포 소화약제의 안정제에 따른 소화특성)

  • Lee, Eungwoo;Shin, Changsub
    • Journal of the Korean Society of Safety
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    • v.30 no.4
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    • pp.79-85
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    • 2015
  • Onboard fire extinguishing system is important to protect cargo and human lives and every oil tanker has foam type fire extinguishing system. Because of environmental problem, agent which contains materials such as Perfluorinated compounds are regulated and the development of the environmental friendly agent is required. The protein foam has less environmental pollution problem and has an excellent fire extinguish performance to oil fire. In the research, bivalency metal salts were added as stabilizer to increase fire resistance and stability of the foam. Ferrous sulfate, Iron chloride and Nickel chloride were used and to adjust to vessel, sea water was applied. As a stabilizer increased, the expansion ratio was raised. However 25% drainage time was decreased over 2.0 wt.% which is knowable that the foam brokes easily. The amount of generated foam was measured to check fluidity of foam and it appeared that when $FeSO_4$ 1.2 wt.% was added, the amount of generated foam reached large and also the 25% drainage time was high. To evaluate the fire extinguishing performance for oil fire, the small scale oil fire test was executed. When $FeSO_4$ 1.2 wt.% was added, fire extinguishing time was in its shortest which informs fluidity of foam and stability are important factors on fire extinguishing efficiency.

Structural Performance of Reinforced Concrete Flat Plate Buildings Subjected to Fire

  • George, Sara J.;Tian, Ying
    • International Journal of Concrete Structures and Materials
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    • v.6 no.2
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    • pp.111-121
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    • 2012
  • The research presented in this paper analytically examines the fire performance of flat plate buildings. The modeling parameters for the mechanical and thermal properties of materials are calibrated from relevant test data to minimize the uncertainties involved in analysis. The calibrated models are then adopted to perform a nonlinear finite element simulation on a flat plate building subjected to fire. The analysis examines the characteristics of slab deflection, in-plane deformation, membrane force, bending moment redistribution, and slab rotational deformation near the supporting columns. The numerical simulation enables the understanding of structural performance of flat plate under elevated temperature and, more importantly, identifies the high risk of punching failure at slab-column connections that may trigger large-scale failure in flat plate structures.

Heat Transfer Characteristics of Bulkhead Penetration Piece for A60 Class Compartment I: Transient Thermal (A60급 구획 적용 격벽 관통용 관의 열전달 특성 I: 관의 설계에 따른 과도 열해석)

  • Park, Woo-Chang;Song, Chang Yong;Na, Ok-Gyun
    • Journal of Ocean Engineering and Technology
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    • v.32 no.5
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    • pp.310-323
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    • 2018
  • In order to protect lives and prevent large-scale injuries in the event of a fire on a ship or an offshore plant, most classification societies are strengthening their fire resistance designs of relevant cargo holds and accommodation compartments to keep flames from being transferred from a fire point to other compartments. Particularly in critical compartments, where flames should not propagate for a certain period of time, such as the A60 class division, both the airtightness and fire-resistant design of a piece passing through a bulkhead are subject to the Safety of Life at Sea Convention (SOLAS) issued by the International Maritime Organization (IMO). In order to verify the suitability of a fire-resistant design for such a penetrating piece, the fire test procedure prescribed by the Maritime Safety Committee (MSC) must be carried out. However, a numerical simulation should first be conducted to minimize the time and cost of the fire resistance test. In this study, transient thermal analyses based on the finite element method were applied to investigate the heat transfer characteristics of a bulkhead penetration piece for the A60 class compartment. In order to determine a rational bulkhead penetration piece design, the transient heat transfer characteristics according to the variation of design parameters such as the diameter, length, and material were reviewed. The verification of the design specification based on a numerical analysis of the transient heat transfer performed in this study will be discussed in the following research paper for the actual fire protection test of the A60 class bulkhead penetration piece.

A Study for Thermal Mechanism of Residential Combustibles with Numerical Modeling (주거공간 단위가연물의 열역학적 수치해석 모델링에 관한 연구)

  • Ahn, Chan-Sol;Kim, Jung-Yup;You, Yong-Ho;Kweon, Oh-Sang;Joo, Sang-Hyun
    • Fire Science and Engineering
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    • v.25 no.6
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    • pp.58-63
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    • 2011
  • This study is intended to present a computational thermal model for the combustibles in a residential building. As the Performance Based Design is more popular, fire-intensity and fire-load have turned out to be very important factors for building design and can be predicted through some computational work. To predict and estimate the thermal properties of the residential combustible fire, we made some numerical models of combustibles in a residential building. In a bid to validate the estimate values, computational analysis results from numerical models were compared with real fire tests. For computational analysis, the Fire Dynamics Simulator was used with Large Eddy Simulation model for turbulence. Consequently, each heat release rate and total heat release curves were successfully estimated.

An Experimental Study on Development of a Window Sprinkler for Fire Spread Prevention along Building External Walls (건물 외벽 화재확산 방지용 윈도우 헤드의 개발을 위한 실험적 연구)

  • Kwark, Jihyun;Kim, Dong-Jun
    • Fire Science and Engineering
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    • v.27 no.3
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    • pp.8-13
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    • 2013
  • In case of fire in a high-rise building fire can be easily spread along the building external walls dramatically if the flame comes out through broken windows. There are a few effective methods to prevent the fire spread at the moment. One is using a fire resistance window, and the other is using a window sprinkler that discharges water to resist flame in case of fire. In this study a window sprinkler which is installed on top of windows and prevents fire by discharging water when its heat-responsive element opens was tested using a large scale furnace in accordance with the standard temperature-time graph. Test result showed that one window sprinkler was able to protect a 2,400 mm wide window from fire for 2 hours and the window backside's temperature locally increased up to $126^{\circ}C$ but kept stable around $100^{\circ}C$ for the test duration.

A Study on Flame Spread Prevention of Sandwich Panel (복합자재 화재확산방지구조에 대한 연구)

  • Cho, Nam-Wook;Kim, Do-Hyun;Shim, Ji-Hun
    • Fire Science and Engineering
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    • v.29 no.6
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    • pp.84-90
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    • 2015
  • Multi-layered material (sandwich panel) consists of double-sided steel plate which is incombustible material or similar material and core material which is not incombustible material. In case of sandwich panel which uses combustible material as insulation, flames spread inside the steel plate at the time of fire so that it is difficult to extinguish fire from the outside and flames spread rapidly and may cause the building to collapse. The current Building Act requires the sandwich panel to secure fire-retardant performance according to the purpose and size of building. In this study, the fire spreading prevention structure applied to partial exterior walls was applied to multi-layered material and its effect was measured through full scale fire test and the possibility to secure fire safety of buildings by applying the fire spreading prevention structure to multi-layered material in future was presented.

A Research on Thermal Properties & Fire Resistance of A Water Film Covered Glazing System for Large Atrium Space (대규모 아트리움에 적용되는 수박형성 유리벽의 열적 특성 및 내화성능에 관한 연구)

  • 박형주;지남용
    • Fire Science and Engineering
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    • v.13 no.4
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    • pp.38-55
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    • 1999
  • In order practically to use fire-defective glazing materials for the compartment wall where a fire-protection rating is mandated, there have been many trials internationally, This research focuses on a feasibility that, if certain water film covered all surface of glass, the glazing system can endure without breaking out under the compartment fire. First of all, a water film spray system was specially designed to wet the entire surface of the glass and also to have tiny small amount of water rebounded from the surface after emitted from nozzles. After this system has proven to have perfect performance, small-scale tests were done to find out if the water film covered glazing system react to the high temperature curve in a small furnace room. Finally, on basis of the obtained data, full-scale experiments were done so that water-film covered glazing system can pass the Korean Standard (KS) test for fire resistance, KS F2257.

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An Experimental Study on the Mechanical Properties of High Strength of High Strength Concrete Subject to High Temperature Heating (고온가열을 받은 고강도 콘크리트의 역학적 특성에 관한 실험적 연구)

  • Lee, Tae-Gyu;Sin, Seung-Bong;Kim, Young-Sun;Lee, Seung-Hoon;Kim, Gyu-Yong;Kim, Moo-Han
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2007.04a
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    • pp.9-12
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    • 2007
  • Recently, research and development related to high strength concrete for the high rise and large scale reinforced concrete building has been actively promoted in worldwide by national and private research project. But, it is reported that violent explosive explosion would be happened when it was exposed in fire. In the existed study, a explosion in a reinforced concrete structure looses the organism by the different contraction and expansion of hardened cement paste and aggregate, and causes crack by thermal stress. In case of the Europe, Japan and America, they have studied the explosion for a long time. However it would hardly study the explosion in domestic, So it is needed base on mechanical properties of fire deterioration in high strength concrete. Therefore, this study is intend as an mechanical properties of specimen to high heating by heating and load test machine and $700^{\circ}C$. As a result, it is willing to propose fundamental data for quick and accurate diagnosis of deteriorated concrete structure by fire damage with experiment according to the design high strength concrete.

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