Experimental investigation of cold-formed steel material at elevated temperatures

Ju, Chen; Young, Ben

doi:10.1016/j.tws.2006.11.003

Cited by 163 publications

(97 citation statements)

References 7 publications

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“…In case of 200 °C, there is an increase of yield strength, which was not noted in other researches, and at 300 °C, this value is close to that recorded in case of room temperature. In the range of 350 °C and 600 °C, the results of the tests are shown substantially similar to the model used by Chen and Young 14 . Otherwise the curves adopted by Kankanamge 4 , for hot-rolled steel, are above the average curve obtained considering temperatures above 300 °C, proving the divergence between the changes of mechanical properties of hot-rolled and cold-formed steels.…”

Section: Comparison Of Yield Strength and Elastic Modulus Reduction Fsupporting

confidence: 75%

“…In the temperature range of 200 °C and 300 °C, the variation of the reduction factors obtained from tests approaches curves adopted by Chen and Young 14 , Kankanamge and Mahendran 12 and Lee et al 9 . In the range of 300 °C and 450 °C, there is a similarity between the K E factors obtained and those presented by Chen and Young 14 and, finally, from 450 °C to 600 °C, the test results are close to the values determined by Wei and Jihong 13 . Reduction factors (K E ) recommended …”

Section: Comparison Of Yield Strength and Elastic Modulus Reduction Fmentioning

confidence: 99%

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Experimental investigation of the mechanical properties of ZAR-345 cold-formed steel at elevated temperatures

2014

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Considering the technical-scientific advances of recent years in the steel construction industry, there is a strong trend for the increasing use of cold-formed steel members in civil construction, due to several advantages such as cost and versatility of fabrication and erection. However, there is need for further study concerning the behavior of this type of steel when subjected to fire conditions. This work deals with the experimental characterization of cold-formed steel at high temperatures. It is recognized that the reduction factors of the mechanical properties applicable to hot-rolled steel members do not remain valid for cold-formed ones. In the case of the European Code, cold-formed members are treated in the same way of hot-rolled or welded thin-walled sections (i.e., class 4), the only differences in relation to the other (class 1, 2 or 3) consisting (i) the definition of the yield strength and (ii) the corresponding reduction factors (shown in Table E

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Section: Comparison Of Yield Strength and Elastic Modulus Reduction Fsupporting

confidence: 75%

Section: Comparison Of Yield Strength and Elastic Modulus Reduction Fmentioning

confidence: 99%

Experimental investigation of the mechanical properties of ZAR-345 cold-formed steel at elevated temperatures

2014

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“…Therefore, in addition to tests on structural members, numerous experimental studies have been conducted to study the effect of temperature on the material response of structural steel of various grades [17][18][19], cold-formed steel [20] and stainless steel [21,22]. At elevated temperatures, the stress-strain curve of structural steel has been shown to deviate significantly from the elastic-perfectly plastic one traditionally assumed for steel design at ambient temperature [23] and becomes increasingly rounded with a pronounced loss of stiffness and strength and significant strain hardening occurring at low strains.…”

Section: Introductionmentioning

confidence: 99%

“…The model proposed by Rubert and Schaumann [26], which assumes an elliptical transition from the end of the elastic range up to the effective yield strength corresponding to 2% strain has been adopted in EN 1993-1-2 [1] and implicitly accounts for the effect of creep. Other material models, usually variants of the Ramberg-Osgood model [27,28] and originally developed for stainless steel at ambient temperature [29][30][31][32], have also been proposed [17][18][19][20][21][22]. This paper focuses on the structural response of steel members failing by local buckling at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

The continuous strength method for steel cross-section design at elevated temperatures

Theofanous

Propsert

Knobloch³

et al. 2016

Thin-Walled Structures

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When subjected to elevated temperatures, steel displays a reduction in both strength and stiffness, its yield plateau vanishes and its response becomes increasingly nonlinear with pronounced strain hardening. For steel sections subjected to compressive stresses, the extent to which strain hardening can be exploited (i.e. the strain at which failure occurs) depends on the susceptibility to local buckling. This is reflected in the European guidance for structural fire design EN1993-1-2 [1], which specifies different effective yield strengths for different cross-section classes. Given the continuous rounded nature of the stress-strain curve of structural steel at elevated temperatures, this approach seems overly simplistic and improved accuracy can be obtained if strain-based approaches are employed [2]. Similar observations have been previously made for structural stainless steel design at ambient temperatures and the continuous strength method (CSM) was developed as a rational means to exploit strain hardening at room temperature. This paper extends the CSM to the structural fire design of steel cross-sections. The accuracy of the method is verified by comparing the ultimate capacity predictions with test results extracted from the literature. It is shown that the CSM offers more accurate ultimate capacity predictions than current design methods throughout the full temperature range that steel structures are likely to be exposed to during a fire. Theofanous, M., Prospert, T., Knobloch, M. and Gardner, L. (2016). The continuous strength method for steel cross-section design at elevated temperatures. Thin-Walled Structures. 98, 94-102. 2Moreover due to its strain-based nature, the proposed methodology can readily account for the effect of restrained thermal expansion on the structural response at cross-sectional level.

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“…Cooke 등이 일반 구조용 강재를 대상으로 많은 연구 결과 를 도출하였고 (4,5) , 2000년대 이후에는 Outinen, Young, Brnic 등의 연구가 꾸준히 이루어지고 있다 (6)(7)(8) . 최근에는 원자력 발전용으로 활용될 수 있는 특수강재와 스테인리 스 강재의 고온특성 평가가 Daw와 Gardner를 중심으로 이루어지고 있다 (9,10) .…”

Section: 구조용 강재의 고온 특성 연구unclassified

A Study on the Properties of SM 400 for Evaluation of Structural Stability at High Temperature

Kwon¹

2013

Journal of Korean Institute of Fire Science and Engineering

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Recently, the risk of fire outbreak is going up because of newly developed combustible materials are intended to apply more. Especially the steel framed structure can lose its load-bearing capacity when it is exposed to higher temperature condition such as a fire. So the pre-evaluation of fire resistance of the structure is very essential that the mechanical properties of yield strength and elastic modulus and thermal properties such as conductivity and linear expansion be required. To get the databases for SM 400 or welding structural steels at high temperature, various temperature conditions were used for deriving the yield strength, elastic modulus, linear expansion, and conductivity and the results were compared to those of SS 400, ordinary structural steel, respectively.

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Experimental investigation of cold-formed steel material at elevated temperatures

Cited by 163 publications

References 7 publications

Experimental investigation of the mechanical properties of ZAR-345 cold-formed steel at elevated temperatures

Experimental investigation of the mechanical properties of ZAR-345 cold-formed steel at elevated temperatures

The continuous strength method for steel cross-section design at elevated temperatures

A Study on the Properties of SM 400 for Evaluation of Structural Stability at High Temperature

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