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.

Experimental Study on Fire Resistance Performance of Glulam Beams

2012 ◽  
Vol 193-194 ◽  
pp. 539-543
Author(s):  
Zhao Peng Ni ◽  
Pei Fang Qiu
Keyword(s):  
Fire Resistance ◽  
Failure Modes ◽  
Test Results ◽  
Fire Performance ◽  
Standard Fire ◽  
Resistance Performance ◽  
Fire Resistance Rating ◽  
Resistance Rating ◽  
Resistance Tests

Abstract : A series of standard fire-resistance tests were carried out to study the fire performance, failure modes and fire-resistance ratings of glulam beams. The test results showed that these glulam beams performed well during the tests, and the fire-resistance rating requirements can be achieved as expected. The study has provided necessary knowledge and experimental data for the determination of fire-resistance performance of glulam beams in the fire code of China.

scholarly journals Polymeric fiber reinforced concrete exposed to fire

2019 ◽  
Vol 10 (1) ◽  
pp. 36-52
Author(s):  
Dainer Marçal Dias ◽  
João Luiz Calmon ◽  
Geilma Lima Vieira
Keyword(s):  
High Temperatures ◽  
Fire Test ◽  
Elevated Temperatures ◽  
Fire Department ◽  
Fiber Reinforced Concrete ◽  
Fire Tests ◽  
Pulp Fibers ◽  
Fire Load ◽  
Standard Fire ◽  
Complementary Analysis

The aim of this work was to investigate the influence of the addition of polypropylene, polyester, polyamide, aramid and aramid pulp fibers on the behavior of concretes subjected to high temperatures. For that, test specimens with fiber additions were made at a rate of 2 kg/m3 and submitted to temperatures in furnace, as well as to high temperatures through direct fire test. Columns were also built and subjected to a live fire simulator belonging to the Espírito Santo Fire Department - Brazil. Microstructural and mechanical properties were analyzed. It has been observed that the fibers may influence the properties of the concrete and that fire tests with standard fire load may be an alternative or complementary analysis of concrete subjected to elevated temperatures.

Evaluation of the Fire Resistance of H-Section Made of High Strength Structural Steels with a Difference of Length

2014 ◽  
Vol 919-921 ◽  
pp. 95-98
Author(s):  
In Kyu Kwon
Keyword(s):  
High Temperature ◽  
Fire Resistance ◽  
Fire Test ◽  
High Strength ◽  
Structural Steels ◽  
Design Phase ◽  
Fire Performance ◽  
High Rise ◽  
Fire Engineering ◽  
Engineering Technique

High-rise building is one of solution for lack of houses and offices in downtown. And high-rise buildings can be built by application of high strength materials such as structural steels and concrete. Particularly, high strength structural steels have much efficient properties in not only design phase but construction one. Therefore, the use of the high strength structural steels has been increased every year. However, the H-section made of the high strength structural steels can be designed and constructed with longer height than that was evaluated for fire resistance by fire test to satisfy the fire regulation. In this study, to suggest an exact fire performance at high temperature of H-section made of high strength structural steels, a fire engineering technique was used. The derived facts showed that SM 570 revealed better structural stability at high temperature and as longer length of H-section was used, the more fire protection materials requited.

scholarly journals FIRE PERFORMANCE OF COMPOSITE-PANEL SEPARATION WALLS

2016 ◽  
Author(s):  
Miroslav Smolka ◽  
Vladimír Mózer ◽  
Piotr Tofiło
Keyword(s):  
Fire Resistance ◽  
Composite Panel ◽  
Resistance Testing ◽  
Fire Performance ◽  
Potential Threat ◽  
Smoke Emission ◽  
Standard Fire ◽  
Fire Resistance Test ◽  
Production Period ◽  
Separating Element

Composite panel walls with both combustible and non-combustible cores were subjected to fire resistance test to EN 1364-1. The results revealed that the combustible-core panels started emitting smoke on the unexposed side due to the presence of joints between panels. In some cases the smoke emission started early after the start for the fire exposure. The start of the smoke production period appeared to depend on the fixation of the panels to the furnace frame; three or four sides fixed as per EN 1364-1. The amounts of smoke released indicate that although smoke leakage/production criterion is not currently part of the standard fire-resistance testing protocol it should be assessed when construction elements with combustible components are tested. Otherwise such a barrier may not be considered as a smoke-safe separating element, because model FED calculations indicate a potential threat to the occupants on the unexposed side at a certain set of conditions.

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.

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 Fire Protective Glass Fiber Reinforced Concrete Plates for Steel Structures under Different Types of Fire Exposure

Buildings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 187
Author(s):  
Marina Gravit ◽  
Elena Golub ◽  
Boris Klementev ◽  
Ivan Dmitriev
Keyword(s):  
Fire Resistance ◽  
Structural Integrity ◽  
Oil And Gas ◽  
Lightweight Concrete ◽  
Limit State ◽  
Single Layer ◽  
Steel Structures ◽  
Fiber Reinforced Concrete ◽  
Fire Tests ◽  
Standard Fire

In a situation where a fire occurs either in a tunnel with a burning vehicle carrying petroleum products, at an offshore platform, or at an oil and gas asset to be protected, such a case is commonly described using a hydrocarbon fire curve. Therefore, it is extremely important to design construction, which can maintain stability and bearing capacity both under the standard and hydrocarbon fire modes. The purpose in this work is to hold a behavior simulation of a steel structure with fireproofing ensured through lightweight concrete slabs reinforced with fiber glass as well as a validation of the outcomes by assessing the experimental findings obtained from the relevant fire tests. A fire resistance study was carried out here for steel structures with a profile ratio of 156 mm−1 for the cases of a standard fire and of a hydrocarbon fire. A constant static load of 687 kN (70 tf) was taken for standard fire and 294 kN (30 tf) for hydrocarbon fire; the column was under vertical compression with one end resting on a hinged support and the other end rigidly fixed. The specimen design incorporated single-layer box-section cladding made of Pyro-Safe Aestuver T slabs, 40 mm thick and of a 650 kg/m3 density, pre-cut to fit the column size. The column strength loss (R) ultimately occurred after 240 min in the standard fire case and after 180 min in the hydrocarbon fire case. As the breach in the fireproofing structural integrity (E) or the installation accuracy cannot be considered, the limit state indicators may show certain discrepancies. According to the simulation performed using SOFiSTiK software, the design fire resistance rating of the structure in a hydrocarbon fire case was 58% higher than the figure obtained by holding fire tests due to the slabs cracking during the experiment session; the discrepancy between the outcomes of the session and the simulation in a standard fire case was as much as 15%.

Experimental study on the fire resistance of concrete filled steel tube reinforced concrete (CFSTRC) column-RC beam frames

2021 ◽  
pp. 136943322110015
Author(s):  
Lei Xu ◽  
Yan-Hong Bao
Keyword(s):  
Reinforced Concrete ◽  
Cross Sections ◽  
Fire Resistance ◽  
Failure Modes ◽  
Load Ratio ◽  
Steel Tube ◽  
Stiffness Ratio ◽  
Fire Load ◽  
Concrete Core ◽  
Concrete Filled Steel Tube

To reveal the temperature characteristics and mechanical properties of frame structures with concrete filled steel tube reinforced concrete (CFSTRC) columns under fire, the fire resistance of four planar frames consisting of CFSTRC columns and reinforced concrete (RC) beams subjected to ISO-834 standard fire was tested in this study. The test parameters included the column fire load ratio, beam fire load ratio, and beam-to-column linear stiffness ratio. In the test, the temperatures of the column, beam, and slab cross-sections in the joint and nonjoint zones were measured, and the fire resistance, beam and column deformation curves, and failure modes of the frame were investigated. The experimental results showed that the concrete volume was the main factor affecting the temperature distribution on each typical cross-section of the frame: the temperatures at the measuring points of the beam and column in the joint zone were significantly lower than the temperatures at the corresponding points in the nonjoint zone, and the concrete outside the steel tube significantly slowed the propagation of temperature to the steel tube and its concrete core. Hence, there was only a small loss of the bearing capacity of steel tube and the core concrete inside the steel tube. The column fire load ratio, beam fire load ratio, and beam-to-column linear stiffness ratio have obvious influences on the fire resistance: the larger the column fire load ratio or beam fire load ratio, the smaller the fire resistance; and the larger the beam-to-column linear stiffness ratio, the larger the fire resistance.

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