Elevated-temperature mechanical properties of high strength structural steel S460N: Experimental study and recommendations for fire-resistance design

2013 ◽  
Vol 55 ◽  
pp. 15-21 ◽  
Author(s):  
Xuhong Qiang ◽  
Frans S.K. Bijlaard ◽  
Henk Kolstein
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Elevated Temperature ◽  
Structural Steel ◽  
Fire Resistance ◽  
High Strength

Optimization of the Concrete Mix Proportions Centered on Performance after Exposure to High Temperature

2011 ◽  
Vol 268-270 ◽  
pp. 372-376 ◽  
Author(s):  
A. Chaboki-Khiabani ◽  
M. Bastami ◽  
M. Baghbadrani ◽  
M. Kordi
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Statistical Study ◽  
High Strength ◽  
Taguchi Approach ◽  
Effective Parameters ◽  
Mix Proportion ◽  
Concrete Mix ◽  
Tensile Splitting Strength ◽  
Considerable Loss

This paper presents the results of an experimental and statistical study on the effect of high temperatures on the retained mechanical properties of high-strength concretes (HSC). The mechanical properties of HSC significantly change during and later than exposure to elevated temperature. The compressive and splitting tensile strength of more than 400 HSC cylindrical specimens with sixteen mix proportion have investigated to study the effect of mix proportion on the retained mechanical properties of HSC specimens after heating. According to these results, a considerable loss was observed for all mixes and specimens in strength particularly in tensile splitting strength. In addition, these experimental data were investigated using Taguchi approach to find the effective parameters of mix proportion. Also, the most optimum mix proportion was found and checked experimentally. According to our results, by controlling some factors in the mix proportion, it is possible to reduce the retained destructive effects of elevated temperature on HSC specimens.

Effect of High Temperature on Concrete: A Literature Review

2006 ◽  
Vol 302-303 ◽  
pp. 138-149 ◽  
Author(s):  
Gai Fei Peng ◽  
Sammy Yin Nin Chan ◽  
Qi Ming Song ◽  
Quan Xin Yi
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
High Temperature ◽  
Elevated Temperature ◽  
Literature Review ◽  
High Strength Concrete ◽  
High Strength ◽  
Research Needs ◽  
Standard Fire ◽  
Fire Condition

This paper presents a review on the effect of fire on concrete, citing 43 references. It was found that most of them are on the behavior of concrete under high temperature conditions more or less different from the standard fire condition. The problem of spalling, which high-strength concrete encounters when exposed to fire, is especially urgent to solve. Since the literature on the behavior of concrete under fire conditions is very limited, the literature even under elevated temperature has to be used as a part of the base of further research. The further research needs urgently to be carried out under the standard fire condition. Residual mechanical properties reported in most previous literature might be overestimated, where natural cooling was usually employed. Proper evaluation of fire resistance of concrete needs more experimental data obtained under various cooling regimes such as water spraying or water quenching.

Study on the Cooling Process of Low Yield Ratio 590-780MPa Grade Steel Plates for High-Rise Buildings

2011 ◽  
Vol 194-196 ◽  
pp. 292-295 ◽  
Author(s):  
Jian Kang ◽  
Zhao Dong Wang ◽  
Guo Dong Wang
Keyword(s):  
Mechanical Properties ◽  
Structural Steel ◽  
High Strength ◽  
Ferrite Matrix ◽  
Yield Ratio ◽  
Steel Plates ◽  
Air Cooling ◽  
Soft Phase ◽  
Cooling Temperature ◽  
Ultra Fast Cooling

To develop 590/780MPa grade low yield ratio structural steel, the effects of ultra fast cooling (UFC) new process on microstructure and mechanical properties were investigated. The results showed that the low yield ratio and high strength can be obtained by proper phase compositions including relative soft phase and hard phase. For the process of UFC + air cooling, when UFC final cooling temperature was 521°C, 22.5% M-A second hard phases were distributed on bainite ferrite matrix in steel No.A2. The mechanical properties can meet requirement of 590MPa grade low yield ratio structural steel. For the process of air cooling + UFC, when UFC initial cooling temperature was 781°C, the multiphase composed of 28.3% ferrite and other bainite / martensite lath structure can ensure the high strength and low yield ratio of steel No.B1. And performance indexes can meet the requirement of 780MPa grade low yield ratio structural steel.

Mechanical properties of high-strength Q960 steel at elevated temperature

2020 ◽  
Vol 114 ◽  
pp. 103010 ◽  
Author(s):  
Weiyong Wang ◽  
Yanhong Zhang ◽  
Lei Xu ◽  
Xiang Li
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
High Strength

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.

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