An Analysis of the Fire Resistance Performance of H-Section with Variance of Column Lengths at High Temperature

2014 ◽  
Vol 501-504 ◽  
pp. 653-656
Author(s):  
In Kyu Kwon
Keyword(s):  
Boundary Condition ◽  
High Temperature ◽  
Structural Stability ◽  
Fire Resistance ◽  
Architectural Design ◽  
Structural Steels ◽  
Steel Buildings ◽  
Resistance Performance

Structural columns are very important members in steel buildings. An evaluation of fire resistance performance of the column is essential to sustain the structural stability in a fire situation. However, the length of columns is dependent on various architectural design variations. Therefore, the fire resistance can be different according to the length of column. In this study, to suggest the adequate fire resistance performance of structural columns by difference of length, an analysis was done based on an ordinary structural steels, SS 400, and hinge to hinge boundary condition. The result showed that the longer the column was, the less the fire resistance.

Comparison Study of Structural Stabilities for H-Section Columns Built with Ordinary Grade Strength Structural Steels According to Boundary Conditions and Lengths at High Temperature

2014 ◽  
Vol 937 ◽  
pp. 424-427
Author(s):  
In Kyu Kwon
Keyword(s):  
Boundary Condition ◽  
High Temperature ◽  
Boundary Conditions ◽  
Fire Resistance ◽  
Structural Steels ◽  
Structural Members ◽  
Steel Buildings ◽  
Standard Fire ◽  
Fire Curve ◽  
Resistance Performance

Fire resistance performance of structural members has been evaluated from each singular section and standard fire curve since the beginning of fire tests. However, the need of the exact fire resistance of H-section columns applied in the steel buildings has increased. The main reason for this is there is a difference between the conditions being conducted during the fire test and that from real situation. In this paper, the structural stability of H-section column made of an ordinary strength grade structural steels, SS 400, SM 400, and SM 490 at high temperature were evaluated and compared with boundary conditions and column’s length. This was done in order to suggest a new guideline for the application of fire protective materials in steel column in which the boundary conditions and column lengths are different from that tested with hinge to hinge and 3500 mm. The findings from this study showed hinge to hinge boundary condition was more conservative. And fire resistance performance of longer columns in the case of hinge to fixed and fixed to fixed boundary condition than from 3500 mm and hinge to hinge boundary condition can sustain at high temperature without adding fire protective materials.

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.

Comparison Study of Fire Resistance According to Differences of Length of H-Section Made of Submarine Structural Steels

2014 ◽  
Vol 909 ◽  
pp. 8-11
Author(s):  
In Kyu Kwon
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Structural Stability ◽  
Fire Resistance ◽  
Structural Steels ◽  
Rapid Decrease ◽  
Comparison Study ◽  
Standard Fire ◽  
Fire Curve ◽  
Standard Fire Curve

Submarine structural steels, such as SM 400, SM 490, and SM 520, have the same structural properties and same grades as general structural steels, but those have better weldability than general structural steels. For that reason, their usage is increasing. However, their fire resistance is not well defined, except for individual fire resistance, such as column and beam. The fire resistance of H-section made of submarine structural steels can be applied with various column lengths. The fire resistance of them is not clear to engineers and residents. To determine the fire resistance, in this paper an analysis was conducted using their mechanical properties at high temperature and related theories with a standard fire curve. As the strength of submarine structural steels is increased, the structural stability showed a rapid decrease while the longer the length of column, the less structural stability of the column represented.

A Study of Fire Resistance According to Boundary Condition of Ordinary Grade Structural Steels

2014 ◽  
Vol 510 ◽  
pp. 97-100
Author(s):  
In Kyu Kwon
Keyword(s):  
Boundary Condition ◽  
High Temperature ◽  
Fire Resistance ◽  
Structural Steels ◽  
Mechanical And Thermal Properties ◽  
Allowable Stress ◽  
Standard Fire ◽  
Fire Engineering ◽  
The Difference ◽  
Fire Curve

Building construction has been developed with an increase of steel application at main members, but the weakness should be resolved with a proper fire resistance. The fire engineering method is regarded as an alternative way to evaluate the fire resistance with mechanical and thermal properties at high temperature. In this paper, the fire resistance of H-section built with ordinary grade structural steels such as SS 400 and SM 490 those are representative structural steels at the construction market were analyzed by the difference of boundary conditions. The study showed that the H-section made of SM 490 represented little difference in reduction ratio of an allowable stress at one hour standard fire curve. And the hinge to hinge boundary condition from both H-sections was the lowest. As the grade of structural steel rises, the difference in an allowable stress at high temperature according to grade of structural steels is inclined to increase.

Analytic Study of Structural Stability at High Temperature of Structural Beam Made of SM 400

2014 ◽  
Vol 977 ◽  
pp. 378-381
Author(s):  
In Kyu Kwon
Keyword(s):  
Heat Transfer ◽  
Thermal Properties ◽  
Thermal Stress ◽  
High Temperature ◽  
Structural Stability ◽  
Fire Resistance ◽  
Analytic Study ◽  
Structural Elements ◽  
Building Fire ◽  
Resistance Performance

A fire occurred in the steel framed building could be yielded an unexpected disasters including loss of human lives and damages of properties. Therefore, to evade the tragedies from the building, fire resistance performance of structural elements is required and specified into each nation’s building regulation. Especially, the structural beam plays a key role to transfer the load applied on the floor to column. In this study, to estimate the fire resistance performance of structural beam made of SM 400, analysis using not only mechanical, thermal properties at high temperature of the SM 400 but theories of heat transfer and thermal stress were conducted. The result of this study showed that as the lengths of beam are increased, the structural stability become getting worse. Therefore, it is not recommended to use the same thickness of fire protective materials derived from prototype’s length, 4100 mm to longer beam.

A Study on Comparison of Mechanical, Thermal Properties of High Strength Structural Steels at High Temperature

2014 ◽  
Vol 902 ◽  
pp. 3-6
Author(s):  
In Kyu Kwon
Keyword(s):  
Thermal Properties ◽  
High Temperature ◽  
Elevated Temperature ◽  
Fire Resistance ◽  
High Strength ◽  
Structural Steels ◽  
Mechanical And Thermal Properties ◽  
Protective Material ◽  
Eurocode 3 ◽  
Resistance Performance

As the strength of structural steels is increasing, the performance of fire resistance should be evaluated clearly and suggested. While their application has been expanded, the evaluation of the fire resistance is inclined to adopt that derived from ordinary strength steels. In order to compare the fire resistance performance of high strength structural steels at high temperature, databases such as mechanical and thermal properties at elevated temperature were compared with those of Eurocode 3. After comparison, it is recommended that the passive protective material is more needed than those for the ordinary strength structural steels to meet the fire resistance requirement.

Analytic Study of Structural Stability for H-Section Column Made of Submarine Structural Steels Based on Boundary Conditions and Column Lengths at High Temperature

2014 ◽  
Vol 898 ◽  
pp. 367-370
Author(s):  
In Kyu Kwon
Keyword(s):  
High Temperature ◽  
Boundary Conditions ◽  
Fire Resistance ◽  
Constructional Material ◽  
Structural Steels ◽  
Structural Performance ◽  
Fire Performance ◽  
Steel Building ◽  
Building Market ◽  
Resistance Performance

Structural steels require performance, such as structural performance, constructional one, and fire performance as an efficient constructional material. However, structural steels have a fundamental weakness in a fire and need to improve constructional performance of welding which resulted in the development submarine structural steels, such as SM 400, SM 490, and SM 520. Their yield strengths are the same as general structural steels, but the weldability was better. Therefore, the application of submarine structural steels increases in steel building market annually. However, the fire resistance performance isnt determined when these are used as main materials in H-section columns in the case of different boundary conditions and different column lengths. In this paper, to confirm and suggest a new guideline for fire protective materials, an advanced engineering design was used with mechanical properties at high temperature and a heat stress analysis. The findings showed that fire resistance of H-section columns with longer lengths and other boundary conditions are determined to satisfy the fire resistance performance if the fire protective materials derived from 3500mm in length and hinge to hinge boundary condition apply to longer column lengths and other boundary conditions.

A Comparison Study of Fire Resistance of High Strength Structural Steels According to Boundary Condition

2014 ◽  
Vol 901 ◽  
pp. 11-14
Author(s):  
In Kyu Kwon
Keyword(s):  
High Temperature ◽  
Structural Steel ◽  
Fire Resistance ◽  
High Strength ◽  
Material Strength ◽  
Mechanical And Thermal Properties ◽  
Comparison Study ◽  
Load Bearing Capacity ◽  
High Rise ◽  
Resistance Performance

Material strength is one of the most important factors in designing a building. For this reason, many structural steel manufacturers have been trying to develop it. In Korea, SM 570 is one high structural steel that has many merits such as longer span and reduction of construction cost for steel works. However, the fire resistance performance of H-section made of SM 570 has not been evaluated. Especially, in high-rise steel building that can be built with various joint systems like hinged to hinge, hinge to fixed, and fixed to fixed. However, the performance of fire resistant is limited. In this paper, to evaluate the fire resistance of H-section made of SM 570, the advanced fire design was conducted using regressive equation of the mechanical and thermal properties at high temperature, compared with those made of an ordinary structural steel, SS 400. The facts show that hinge to hinge had the lowest load bearing capacity at high temperature. Therefore, to keep the same fire resistance with other types boundary conditions, the more passive fire materials are required.

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.

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