Low-cycle fatigue test and life assessment of carbon structural steel GB Q235B butt joints and cruciform joints

doi:10.1177/1369433218795292

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Low-cycle fatigue test and life assessment of carbon structural steel GB Q235B butt joints and cruciform joints
	Fang, Zhao 2,3; Li, Aiqun 1,2; Shen, Sheng 2; Li, Wanrun 2,4
刊名	Advances in Structural Engineering
	2019-02-01
卷号	22 期号:3 页码:581-596
关键词	Building materials Butt welding Capillary flow Failure modes Fatigue testing Steel construction Steel testing Welds Butt joints Cruciform joints Fatigue assessments Low-cycle fatigue tests slip
ISSN号	13694332
DOI	10.1177/1369433218795292
英文摘要	Axial low-cycle fatigue tests are conducted on transverse butt joint specimens and cruciform joint specimens made of carbon structural steel GB Q235B. The effect of slip between the specimens and the grips of the test machine is considered by the proposal of a linear slip model. The cyclic softening properties are studied by observing the variation of stress amplitude with cycles. The cyclic stress–strain curve and the strain–life curve for both kinds of specimens are obtained based on the fatigue test data, and the corresponding coefficients are fitted. In order to verify the fatigue test results, finite element models of specimens are established and the corresponding fatigue life assessment is conducted using the local stress–strain approach and the equivalent structural stress approach, respectively. The results show that the effect of slip is unneglectable and the established linear slip model is reasonable. The two kinds of specimens both show a strain softening property, but cruciform joint specimens experience sudden falls of stress amplitude during the test due to the damage of welded lines; cruciform joint specimens show an either one-side failure mode or two-side failure mode while butt joint specimens only show a one-side failure mode; the two-side failure mode tends to lead to shorter fatigue life, so in the design of cruciform joint, such failure mode should be avoided. © The Author(s) 2018.
WOS研究方向	Construction & Building Technology ; Engineering
语种	英语
出版者	SAGE Publications Inc., United States
WOS记录号	WOS:000456529600002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150637]
专题	土木工程学院
作者单位	1.Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing, China; 2.School of Civil Engineering, Southeast University, Nanjing, China; 3.Graduate School of Engineering, Kyoto University, Kyoto, Japan; 4.Institution of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou, China
推荐引用方式 GB/T 7714	Fang, Zhao,Li, Aiqun,Shen, Sheng,et al. Low-cycle fatigue test and life assessment of carbon structural steel GB Q235B butt joints and cruciform joints[J]. Advances in Structural Engineering,2019,22(3):581-596.
APA	Fang, Zhao,Li, Aiqun,Shen, Sheng,&Li, Wanrun.(2019).Low-cycle fatigue test and life assessment of carbon structural steel GB Q235B butt joints and cruciform joints.Advances in Structural Engineering,22(3),581-596.
MLA	Fang, Zhao,et al."Low-cycle fatigue test and life assessment of carbon structural steel GB Q235B butt joints and cruciform joints".Advances in Structural Engineering 22.3(2019):581-596.