scholarly journals THE BEHAVIOUR OF SPECIAL OSB BOARDS UNDER FIRE CONDITIONS, The influence of OSB board´s fire coating on the fire resistance of light timber frame assemblies

2016 ◽  
Author(s):  
Petr Kuklík ◽  
Magdaléna Charvátová
Keyword(s):  
Fire Resistance ◽  
Fire Test ◽  
Test Laboratory ◽  
Fire Tests ◽  
Load Bearing ◽  
Timber Frame ◽  
Charring Rate ◽  
Fire Conditions

The paper is focused on the influence of fire resistant coatings used on OSB boards on the fire resistance of entire light timber frame wall assemblies. Two fire tests were performed in the fire test laboratory of PAVUS, a.s. in Veselí nad Lužnicí. The fire tests were performed on a load bearing wall. The wall dimensions were 3.0 (depth) x 3.0 (height) m. According to EN 1995-1-2, the calculation for fire paints and coatings is not possible. The aim of the paper is the determination of the influence of this type of coating on the OSB board’s charring rate, the determination of the start of charring of a timber stud and the fire resistance of the whole construction.

Study on the Data-Bases for Fire Engineering Design of Structural Steels Members

2012 ◽  
Vol 628 ◽  
pp. 156-160
Author(s):  
In Kyu Kwon ◽  
Hyung Jun Kim ◽  
Heung Youl Kim ◽  
Bum Yean Cho ◽  
Kyung Suk Cho
Keyword(s):  
Bearing Capacity ◽  
Fire Resistance ◽  
Engineering Method ◽  
Fire Tests ◽  
Structural Members ◽  
Data Bases ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
In Fire ◽  
Resistance Performance

Structural steel has been used since the early 1970’s in Korea as primary structural members such as columns, beams, and trusses. The materials have much higher strength such as fast construction, high load bearing capacity, high construction quality but those have a fatal weakness as well. Load-bearing capacity is going down when the structural members are contained in fire condition. Therefore, to protect the structural members made of steels from the heat energy the fire resistance performance required. Generally, the fire resistance performance have evaluated from the exact fire tests in fire furnaces. But the evaluation method takes much more time and higher expenses so, the engineering method requires. The engineering method not only adopts a science but also an engineering experience. In this paper, to make various data-bases for evaluation of structural members such as columns(H-section, RHS), beams, loaded fire tests were conducted and derived not only each limiting temperature but also fire resistance respectively.

EXPERIMENTAL STUDY ON STRUCTURAL BEHAVIOR OF FIRE PROTECTED DOUBLE CFT COLUMN SUBJECTED TO FIRE LOAD

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Kyung Soo Chung ◽  
Jae Sung Lee ◽  
Jong Eun Song ◽  
Woo Chul Kim ◽  
Heung Youl Kim ◽  
...  
Keyword(s):  
Fire Resistance ◽  
Fire Test ◽  
Failure Modes ◽  
Temperature Deformation ◽  
Fire Tests ◽  
Fire Performance ◽  
Fire Load ◽  
Standard Fire ◽  
Fire Endurance ◽  
Cft Column

New concrete filled double-tube (CFDT) sections consist of an inner and outer tube with fire protection mortar (FPM) filling the cavity between them and the inner tube also filled with concrete or not. An investigation into the fire performance of CFDT during the standard fire test is reported. Six full size FPM filled CFDT columns were designed for the fire tests. Detail failure modes of overall specimens and each component in the columns as well as temperature, deformation and fire endurance were presented. It showed that the fire resistance in the CFDT columns is significantly higher than that in concrete filled steel tubular (CFT) columns. Investigation into the fire performance of the columns reveals possible solutions to improve the fire resistance of CFT members.

An Evaluation of the Fire Performance of H-Section Made of Ordinary Strength Structural Steels by Differences of Length

2014 ◽  
Vol 893 ◽  
pp. 436-439
Author(s):  
In Kyu Kwon
Keyword(s):  
Yield Strength ◽  
Structural Steel ◽  
Structural Stability ◽  
Fire Resistance ◽  
Fire Test ◽  
Structural Steels ◽  
Fire Performance ◽  
Steel Building ◽  
Resistance Performance

Fire resistance performance in steel building is very important for sustaining structural stability during a fire. However, the fire performance has been evaluated by fire test with only one length of the H-section made of an ordinary strength structural steel, such as SS 400 or SM 400. These have the same yield strength, but SM 400 has a better weldability. Therefore, the determination of fire protective materials can be difficult when the H-section made of SS 400 and SM 400 is applied into columns having different lengths are changed. In this paper, an evaluation was conducted to suggest a new guideline for the fire resistance of H-section built with an ordinary strength steels such as SS 400 and SM 400 and having variance of lengths. The results revealed the H-section made of SM 400 showed a little better fire resistance performance. Also, the longer the length of column, the less the fire resistance. Therefore, a new guideline is required to compensate the fire resistance of longer column than that from fire tested.

scholarly journals Temperature distribution based on fire resistance tests in fiberglass reinforced concrete beams

2021 ◽  
Vol 18 (3) ◽  
pp. 54-63
Author(s):  
N. V. Begunova ◽  
◽  
V. N. Vozmishchev ◽  
Keyword(s):  
Reinforced Concrete ◽  
Temperature Distribution ◽  
Working Conditions ◽  
Fire Resistance ◽  
Concrete Beams ◽  
Test Laboratory ◽  
Reinforced Concrete Beams ◽  
Reinforced Concrete Structures ◽  
Fire Tests ◽  
Resistance Tests

The article presents the results of the study on the temperature distribution in fiberglass reinforced concrete beams produced by the KomAR in accordance with TU 2296-001-24488682-2014, on the basis of fire tests conducted in the test laboratory and test center for fire safety at the FGBU VNIIPO of EMERCOM of Russia. The value of the coefficient of working conditions of fiberglass rebar γ st is determined by analogy with SP 27.13330.2017 «Concrete and reinforced concrete structures designed to work in conditions of exposure to elevated and high temperatures», depending on the temperature.

scholarly journals VARIABILITY OF CHARRING ALONG THE WOODEN WALL STUDS

2010 ◽  
Vol 2 (4) ◽  
pp. 119-128 ◽  
Author(s):  
Alar Just ◽  
Tarmo Tera
Keyword(s):  
Cross Section ◽  
Mineral Wool ◽  
Full Length ◽  
Entire Length ◽  
Fire Tests ◽  
X Ray ◽  
Timber Frame ◽  
Char Layer ◽  
Charring Rate ◽  
Optical Vibration

The effect of timber densities on the charring of timber members insulated by heat-resistant mineral wool is described in this paper. Special attention is given to variability of charring along the stud. After the fire tests, the studs were saved in their entire length. Char layer was mechanically removed from the studs under investigation. Charred studs of timber frame walls were scanned three-dimensionally over the full length afterfull-scale fire tests. Densities were measured by X-ray and optical vibration scanner. Cross-section properties and densities of the studs were measured along the stud. Charring rate is not uniform along the full length of a single timber wall stud. This corresponds probably to the variation of density of wood. Adjusting the designmodel for charring of timber frame assemblies, as given in EN 1995-1-2, to allow for the influence of density may give an advantage for members with higher density.

Determination of Fire Resistance of Ceiling Structure Variant Design on the Basis of Timber Using Numerical Calculation Methods

2016 ◽  
Vol 820 ◽  
pp. 379-384
Author(s):  
Róbert Leško ◽  
Martin Lopušniak
Keyword(s):  
High Temperature ◽  
Numerical Calculation ◽  
Fire Resistance ◽  
Building Materials ◽  
Effective Alternative ◽  
Fire Tests ◽  
Calculation Methods ◽  
Variant Design ◽  
Temperature Impacts

Ability to resist of high temperature impacts during fire is not based exclusively on ignitability of building materials. At the present time, fire resistance is declared mainly through fire tests, but numerical procedures for the determination of fire resistance also represent an effective alternative in this field. Using calculation methods for the determination of ceiling structure fire resistance on the basis of timber is subject of the submitted paper. The main objective of this paper is to demonstrate the fact that timber, or products from it, are building materials capable to resist impacts of fully developed fire for the period of more than 60 minutes in spite of their flammability. Applicability of these results in selected countries of Europe can be seen from the list of requirements.

scholarly journals Experimental evaluation of proposed multi-layered structure fire test methodology

2020 ◽  
pp. 231-231
Author(s):  
Remigijus Guobys ◽  
Vladas Vekteris ◽  
Vadim Moksin
Keyword(s):  
Numerical Simulation ◽  
Layered Structure ◽  
Experimental Evaluation ◽  
Fire Test ◽  
Layered Structures ◽  
Fire Tests ◽  
Test Methodology ◽  
Temperature Deformations ◽  
Structural Solutions ◽  
Fire Conditions

The paper presents results of numerical simulation and fire tests of multi-layered structures carried out under real fire conditions. It has been shown that fire test carried out according to ISO 834 standard differs from fire test conducted under real fire conditions. A new fire test methodology has been proposed. It is suggested to use real fire temperatures during fire tests to avoid accidents and allow occupants to evacuate the building safely. ISO fire test standard should be improved visibly. Structural solutions to reduce temperatures and temperature deformations of multi-layered structures during fire are also reviewed. It was established that the gypsum layer should be placed in the middle of multi-layered structure in order to cool the structure more efficiently during fire.

scholarly journals PECULIARITIES OF EVALUATION OF METHODS OF DETERMINATION OF CHARACTERISTICS OF FIRE RESISTANCE OF BUILDING STRUCTURES

2020 ◽  
Vol 1 (2) ◽  
pp. 29-40
Author(s):  
S Novak ◽  
M Novak ◽  
O Bedratiuk
Keyword(s):  
Fire Resistance ◽  
Fire Protection ◽  
Steel Structures ◽  
Bearing Steel ◽  
Building Structures ◽  
Load Bearing ◽  
Methods Of Determination ◽  
Wide Range ◽  
The Difference

The results of the study aimed at further improvement and development of procedures for evaluating methods of determining the fire resistance characteristics of building structures are presented. The features of estimation of methods of determination of characteristics of fire resistance of building structures are determined. It is established that for the validation of experimental-calculation methods intended to determine the thickness of fire protection of building structures, which ensures their fire resistance in a wide range of parameters of these structures, it is impossible to use samples of structures with certain properties due to their inability to create. A procedure for such validation using a computational experiment method is proposed. In this procedure, accurate (conditional) temperature data for steel column specimens are determined by solving a direct one-dimensional non-stationary thermal conductivity problem. The validity of the proposed validation procedure by its application for the experimental calculation method, designed to determine the thickness of fire protection materials for load-bearing steel structures (columns and beams), has been established. It is established that the overwhelming number of calculated values of the thickness of the fire protection materials, determined by this method, exceeds its true values, which indicates the acceptability of the obtained results in terms of providing fire resistance of load-bearing steel structures. It is established that the difference between the calculated and actual values of the thickness of the fire protection materials can reach a considerable value (twice or more).The direction of further researches which are focused on revealing of influence of thermophysical properties of fire protection materials and stress-deformed state of samples of steel structures during the test on the accuracy of the method. This will identify more appropriate procedures for evaluating the method and processing the experimental data with increased accuracy.

scholarly journals Ignitability small attack flame fire test of gypsum composite reinforced with natural fibres

2019 ◽  
Vol 10 (1) ◽  
pp. 57-61
Author(s):  
Jiří Teslík ◽  
Markéta Hošťálková ◽  
Nikola Vavřínová
Keyword(s):  
Composite Materials ◽  
Building Materials ◽  
Fire Test ◽  
Natural Fiber ◽  
Natural Fibres ◽  
Fire Tests ◽  
Flame Resistance ◽  
Building Products

Ignitability is one of the parameters that characterize the behaviour of building materials on flame action. The Ignitability Small Attack Flame fire test is used for the classification of building products by their reaction to fire. On the basis of the Ignitability fire test it can be determined that the tested material will be classified into the class E by reaction to fire. The Ignitability Small Attack Flame fire test precede the Single Burning Item fire test, that is used for classification of building products to class D, C, B, A2. The results of the Ignitability fire test were carried out as part of the research on the properties of gypsum composite with natural fiber reinforcement. As part of the research series of ignitability tests on two types of gypsum composite were carried out. The first type was a gypsum composite reinforced with straw fibres. The second type was composite reinforced with wooden fibres. Developed composite materials could be used in the future as board materials and therefore the determination of their fire parameters is a very important part of research. The results of the fire tests have shown that the developed material has a very good flame resistance.

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