Post-fire mechanical properties of high strength structural steels S460 and S690

Qiang, Xuhong; Bijlaard, F.S.K.; Kolstein, Henk

doi:10.1016/j.engstruct.2011.11.005

Cited by 252 publications

(126 citation statements)

References 6 publications

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“…Generally, the higher the attained temperatures are, the less susceptible the other parameters become, while the sensitivity due to strain rate and pre-deformation for the same temperatures was higher for the retained yield stresses. Wang et al (2015) investigated the Q460 grade steel, which is produced by heat treatment using quenched and tempered process, in contrary to the normalized steel S460 NL, which has been explored by Qiang et al (2012b). Indeed, significant differences have been observed on the retained elasticity between Q460 and S460, which emphasize the importance of the manufacturing process on the mechanical behaviour of steel after subjected to fire and cooled down.…”

Section: Studies On Mechanical Propertiesmentioning

confidence: 99%

Mechanical properties of High and Very High Steel at elevated temperatures and after cooling down

2017

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High-strength steels (HSS) are produced using special chemical composition or/and manufacturing processes. Both aspects affect their mechanical properties at elevated temperatures and after cooling down, and particularly the residual strength and the ductility of the structural members. As HSS equates the design of lighter structural elements, higher temperatures are developed internally compared to the elements designed with conventional carbon steel. Therefore, the low thickness members, along with the severe effect of high temperature on the mechanical properties of the HSS, constitute to the increased vulnerability of such structures in fire. Moreover, the re-use and reinstatement of these structures are more challenging due to the lower residual mechanical properties of HSS after the cooling down period. This paper presents a review of the available experimental studies of the mechanical properties of HSS at elevated temperatures and after cooling down. The experimental results are collected and compared with the proposed material model (reduction factors) of EN1993-1-2. Based on these comparisons, modified equations describing the effect of elevated temperatures on the mechanical properties of HSS are proposed. Also, the post-fire mechanical properties of HSS are examined. A comprehensive discussion on the effect of influencing parameters, such as manufacturing process, microstructure, loading conditions, maximum temperature, and others is further explored.

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Section: Studies On Mechanical Propertiesmentioning

confidence: 99%

Mechanical properties of High and Very High Steel at elevated temperatures and after cooling down

2017

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“…구조용 강재를 적용한 강구조 건축물의 경우, 화재 발생 시에는 내력적 성능이 급격히 저하하기 때문에 열의 침투 에 의한 성능저하를 방지하기 위하여 내화피복을 요구하 고 있으며, 내화피복에 관한 기준은 온도와 내력 두 가지 가 있다 (3) . (4)(5)(6)(7) . 우리 나라는 권인규가 수행한 일반 구조용 강재의 고온 특성 연구가 대표적인 연구로 판단된다 (8,9) .…”

Section: 서 론unclassified

Evaluation Study on the Mechanical and Thermal Properties of High Strength Structural Steel at High Temperature

Kwon

2013

Journal of Korean Institute of Fire Science and Engineering

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Recently, building constructions have been developed toward high-rise, long span, and multi-complexed using the high strength materials, optimized section. But the structural behavior of steel structural members built with a high strength steel at fire condition is not clarified because of lacking of information of related references such as mechanical and thermal properties at high temperature situation. In this paper, to evaluate the structural stability of member or frame of steel framed building at fire situation through the engineering method, the mechanical and thermal experimental coupon tests have conducted at various high temperatures and the comparison to those of ordinary strength steels were done.

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“…Qiang et al [19,20] pointed out that when the temperature was below 600°C the post-fire mechanical properties loss of S460, S690 and S960 were negligible. Furthermore, all test specimens showed ductile failure with necking and no brittle failure was observed.…”

Section: Post-fire Behavior Of Hssmentioning

confidence: 99%

Behavior of High Strength Steels under and After High Temperature Exposure: A Review

Wang¹,

Lui²

2017

J Steel Struct Constr

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Fire-resistant and high temperature behavior of high strength steels (HSS) for structural engineering applications has become an important research topic in recent years. In this paper, a succinct review of HSS behavior under and after high temperature exposure is provided. The review addresses the following aspects of HSS: (1) their mechanical properties under and after fire exposure, (2) residual stress in welded HSS sections, and (3) high temperature performance of HSS columns. Recent studies have demonstrated that different grades of HSS can exhibit noticeable differences in their mechanical properties under and after fire exposure, and different cooling methods could have an effect on the post-fire mechanical properties of HSS. Because current design standards for steel structures under elevated temperature were developed based on mild steel, care must be exercised when applying these standards to HSS as they are not necessarily applicable.

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Post-fire mechanical properties of high strength structural steels S460 and S690

Cited by 252 publications

References 6 publications

Mechanical properties of High and Very High Steel at elevated temperatures and after cooling down

Mechanical properties of High and Very High Steel at elevated temperatures and after cooling down

Evaluation Study on the Mechanical and Thermal Properties of High Strength Structural Steel at High Temperature

Behavior of High Strength Steels under and After High Temperature Exposure: A Review

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