Post-fire Mechanical Behaviors and the Mechanism of their Influence on a 690 MPa Grade High-Strength Steel for High-Rise Buildings

doi:10.1002/srin.202200307

IMR OpenIR

	Post-fire Mechanical Behaviors and the Mechanism of their Influence on a 690 MPa Grade High-Strength Steel for High-Rise Buildings
	Zhu, Wenting 1; Cui, Junjun 2; Feng, Yang 1; Zhao, Yang 3; Chen, Zhenye 1,4; Chen, Liqing 1
通讯作者	Chen, Liqing(lqchen@mail.neu.edu.cn)
	2022-09-22
发表期刊	STEEL RESEARCH INTERNATIONAL
ISSN	1611-3683
页码	12
摘要	Herein, the residual mechanical behaviors of a 690 MPa grade high-strength steel after exposure to fire for an extended duration are investigated, and the factors affecting their variation based on the theories of metallurgy are explored. The corresponding tensile properties and microstructure tests are conducted on this steel soaked at 300-900 degrees C for 3 h and then cooled in air. The results show that there is negligible influence of temperature on residual mechanical properties at 600 degrees C or lower. It can be considered that the critical fire temperature is 600 degrees C, beyond which the strength decreases sharply. This can be attributed to the formation of ferrite and grain coarsening. However, at 900 degrees C, its residual strength can still maintain approximately half of that at room temperature. It is related to the contribution from fine nanoscaled precipitates of 10-40 nm in size. Compared with steels having the same nominal yield strength, the dependence of residual mechanical properties on elevated temperatures for this steel varies due to the difference in microstructure characteristics. New predicted equations are proposed for this novel structural steel to guide on better prediction of residual mechanical properties in steel structure systems.
关键词	high-strength structural steels microstructures post-fire predicted equations residual mechanical properties
资助者	Independent Project of State Key Laboratory of Rolling and Automation, Northeastern University ; National Natural Science Foundation of China ; Key Research and Development Program of Hebei Province of China ; HBIS Company Limited ; NEU
DOI	10.1002/srin.202200307
收录类别	SCI
语种	英语
资助项目	Independent Project of State Key Laboratory of Rolling and Automation, Northeastern University[ZZ202001] ; National Natural Science Foundation of China[51904071] ; Key Research and Development Program of Hebei Province of China[18211019D] ; HBIS Company Limited[2019040200044] ; NEU[2019040200044]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000858862500001
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/175946
专题	中国科学院金属研究所
通讯作者	Chen, Liqing
作者单位	1.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 3.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 4.Technol Res Inst HBIS, User Technol Dept, Shijiazhuang 050000, Hebei, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Wenting,Cui, Junjun,Feng, Yang,et al. Post-fire Mechanical Behaviors and the Mechanism of their Influence on a 690 MPa Grade High-Strength Steel for High-Rise Buildings[J]. STEEL RESEARCH INTERNATIONAL,2022:12.
APA	Zhu, Wenting,Cui, Junjun,Feng, Yang,Zhao, Yang,Chen, Zhenye,&Chen, Liqing.(2022).Post-fire Mechanical Behaviors and the Mechanism of their Influence on a 690 MPa Grade High-Strength Steel for High-Rise Buildings.STEEL RESEARCH INTERNATIONAL,12.
MLA	Zhu, Wenting,et al."Post-fire Mechanical Behaviors and the Mechanism of their Influence on a 690 MPa Grade High-Strength Steel for High-Rise Buildings".STEEL RESEARCH INTERNATIONAL (2022):12.