• Title/Summary/Keyword: Fire Resistance Performance

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A Evaluation on Flexural Behavior for Hollow Core Slab of Fire Resistance section for Residence Building (주거용 내화단면 중공슬래브의 휨거동 평가)

  • Boo, Yoon-Seob;Bae, Kyu-Woong;Shin, Sang-Min
    • Journal of Korean Association for Spatial Structures
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    • v.23 no.2
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    • pp.61-68
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    • 2023
  • A two-hour fire-resistance PC hollow slab for residential use was developed to secure structural and fire-resistance performance and to be applied to the general building and apartment housing markets. Compared to the existing hollow slab, in order to secure the same or better structural performance and economic feasibility by reducing the quantity, it was attempted to secure the fire resistance performance by reducing the concrete filling rate in the cross section and adjusting the thickness of the upper and lower flanges by optimizing the hollow shape in the cross section of the slab. For structural performance evaluation, experiments were performed on PC hollow slabs by varying the member thickness and the presence or absence of overlaid concrete, and all of the experimental results showed that the design strength was sufficiently exhibited and that stability during construction was possible. The developed synthetic PC hollow slab has secured fire resistance and residential performance so that it can be applied to all buildings, and it is intended to be immediately applied to the field.

A Study on the Fire Resistance Performance of Reinforced Concrete Columns according to Axial Load Ratio (축력비 조건에 따른 철근콘크리트기둥의 내화성능에 관한 연구)

  • Hwang, Kyu-Jae;Cho, Bum-Yean;Yeo, In-Hwan
    • 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.

Fire Resistance Performance of FRP Rebar Reinforced Concrete Columns

  • Wang, Hui;Zha, Xiaoxiong;Ye, Jianqiao
    • International Journal of Concrete Structures and Materials
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    • v.3 no.2
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    • pp.111-117
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    • 2009
  • Concrete columns reinforced with Fibre Reinforced Polymer (FRP) rebar have been increasingly used in civil engineering applications, while the research on fire resistance of such structural members is still very limited. In this paper, attempts are made to predict temperature distribution and mechanical performance of FRP rebar reinforced concrete columns in fire. The effect of concrete cover and section size on fire resistance time is studied by the finite element method. Based on a parametric study, a simple empirical formula to predict fire resistance time is proposed for possible adoption in fire resistance design.

Study on Fire Resistance Performance According to Boundary Conditions for Beams Made of High-Strength Structural Steels Using Analytical Methods (경계조건에 따른 고강도 H형강 부정정 보부재의 해석적 내화성능 연구)

  • Kwon, In-Kyu
    • Fire Science and Engineering
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    • v.29 no.5
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    • pp.23-28
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    • 2015
  • Recently, structural materials have been developed to have high performance, and SM 520 has been developed and used for high-rise buildings. However, fires frequently occur in buildings, and the number of victims and amount of damage increase year by year. However, the evaluation of fire resistance performance for structural beams made of SM 520 is done with specimens made of ordinary structural steels with boundary conditions of a fixed beam, and the results are allowed for use in steel-framed buildings. This study analyzed the fire resistance performance of statistically indeterminate beams built with SM 520. The analysis used a fire engineering technique that includes mechanical and thermal data of SM 520 and heat transfer theory, and heat stress analysis was also conducted. The results from the analysis were compared with those from a statistically determinate beam made of ordinary structural steels.

Probabilistic seismic and fire assessment of an existing reinforced concrete building and retrofit design

  • Miano, Andrea;de Silva, Donatella;Compagnone, Alberto;Chiumiento, Giovanni
    • Structural Engineering and Mechanics
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    • v.74 no.4
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    • pp.481-494
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    • 2020
  • In this paper, a probability-based procedure to evaluate the performance of existing RC structures exposed to seismic and fire actions is presented. The procedure is demonstrated with reference to an existing old school building, located in Italy. The vulnerability assessment of the building highlights deficiencies under both static and seismic loads. Retrofit operations are designed to achieve the seismic safety. The idea of the work consists in assessing the performance of the existing and retrofitted building in terms of both the seismic and fire resistance. The seismic retrofit and fire resistance upgrading follow different paths, depending on the specific configuration of the building. A good seismic retrofit does not entail an improving of the fire resistance and vice versa. The goal of the current work is to study the variation of response due to the uncertainties considered in records/fire curves selection and to carry out the assessment of the studied RC structure by obtaining fragility curves under the effect of different records/temperature. The results show the fragility curves before and after retrofit operations and both in terms of seismic performance and fire resistance performance, measuring the percent improving for the different limit states.

Comparison of the Fire Resistance Performance of Firestop Systems on Non-Metallic Pipes, Based on the Type of Through-Penetration Sleeve Used (비금속관 설비관통부의 슬리브 종류에 따른 내화성능 비교)

  • Jeong, A-Yeong;Choi, Hong-Beom;Park, Jin-O;Lee, Hyung-Do
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2023.05a
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    • pp.301-302
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    • 2023
  • In this study, we aimed to identify changes in fire resistance according to the type of sleeves used for pipe penetrations and to examine their accreditation of fire resistance performance and use them as basic data. The test results of fire resistance according to the type of sleeve used in non-metallic pipe facilities showed that the temperature on the support side was higher for sleeves with higher thermal conductivity. For the temperature on the surface of the pipes, in the case of galvanized steel plates, steel pipes, and structures without sleeves, the highest temperature was observed after the expansion of the firestop material for 46 to 53 minutes and then decreased. PVC sleeves showed a steady increase in temperature until 53 minutes, after which the temperature did not increase further. In addition, for non-metallic pipes, the effect of the type of sleeve on fire resistance is considered to be insignificant because the lower part (heating direction of the furnace) under the support structure is cut off to block the heat during the two-hour fire resistance test.

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Enhancing the Fire Performance of Concrete-Filled Steel Columns through System-Level Analysis

  • Fike, R.S.;Kodur, V.K.R.
    • International Journal of High-Rise Buildings
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    • v.2 no.1
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    • pp.11-21
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    • 2013
  • The use of concrete filling offers a practical alternative for achieving the required stability of steel Hollow Structural Section (HSS) columns under fire conditions. However, current methods for evaluating fire resistance of Concrete Filled Hollow Structural Steel (CFHSS) columns are highly conservative as they are based on an elemental approach without due consideration to structural interactions that occur in framed structural systems. To overcome this limitation, a system level fire resistance analysis was carried out by treating CFHSS columns as part of an overall structural frame. In this analysis, an eight story steel-framed building was modeled under a range of standard and performance-based fire scenarios (including multi-story progressive burn-out fires) to evaluate the contribution of various structural members/assemblies to overall fire resistance. One of the primary factors considered was the use of concrete filling in HSS columns as an alternative to standard W-shape columns. Results from the analysis indicate that the use of CFHSS columns, in place of W-shape columns, in a performance-based environment can fully eliminate the need for applied fire protection to columns, while providing the required level of structural fire resistance.

An Experimental Study on the Fire Resistance Performance of the Reinforced Concrete Columns According to the Cross Section Size and Depth of Concrete Cover (단면크기 및 피복두께 변화에 따른 철근콘크리트 기둥의 내화성능에 관한 실험적 연구)

  • Cho, Kyung-Suk;Yeo, In-Hwan;Cho, Bum-Yeon;Kim, Heung-Youl;Min, Byung-Yeol
    • Fire Science and Engineering
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    • v.25 no.1
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    • pp.78-84
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    • 2011
  • Recent researches of the fire resistance in concrete focus on how to secure relevant functions in the high strength concrete. However, the demand of normal strength concrete less than 40 MPa takes most of the total concrete demand. Therefore, fire resistance study needs to cover not only high strength concretes but also normal strength concretes. This study evaluated the fire resistance performance of 40 MPa concrete columns, taking the concrete covering thickness and the size of section as variables. Consequently, the fire resistance performance improved as the section size and the covering thickness became larger.

An Experimental Study on The Fire Resistance Performance of Steel Encased Reinforcement Concrete and Steel Framed Mortar Beam with Loading Condition (철골 철근콘크리트 보 및 철골철망 모르타르조 보의 전열특성 및 화재거동에 관한 실험적 연구)

  • Kim, Hyung-Jun;Kim, Heung-Youl;Yeo, In-Hwan;Kwon, Ki-Hyuck;Kwon, In-Kyu
    • Fire Science and Engineering
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    • v.26 no.1
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    • pp.80-88
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    • 2012
  • This study evaluates the fire resisting capacity of the beam of the legal fire resistance construction, which establishes the Article 3 of the Regulations on Escape and Fire Resistance of Buildings. There are a total of five structures that we consider as legal fire resistance constructions, however, this study has a primary target of the reinforced concrete beam, and tests the fire-resistant performance depend on the covering depth of reinforce concrete. The results showed that it meets the three hours, the maximum statutory fire resistance time, if it was a load ratio of 0.5 and covering depth of 40 cm. Steel framed mortar beam is legal fire resistance structure that it was possessed three hours fire resistance performance, if it was a load ratio of 0.4 and covering depth of 60 mm.

An Experimental Study on the Fire Resistance Performace of Intumescent Coating System by Environmental Testing Procedure (환경시험방법에 의한 내화도료의 내화성능에 관한 실험적 연구)

  • Park, Soo-Young;Sung, Si-Chang;Choi, Dong-Ho;Kim, Dae-Hoi;Lee, Sea-Hyun;Lee, Jong-Chan
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2008.04a
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    • pp.69-72
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    • 2008
  • This study is designed to understand changes in fire resistance performance of intumescent coating system through follow-up tests on temperature of unexposed surface for the domestic intumescent coating system by environmental testing procedure.

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