Fire resistance of reinforced SHS T-joints considering gradient temperature effect under post-earthquake fire

doi:10.1016/j.jcsr.2022.107195

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	Fire resistance of reinforced SHS T-joints considering gradient temperature effect under post-earthquake fire
	Xu, Jixiang; Jiang, Wang; Han, Jianping; Wang, Jianjun
刊名	Journal of Constructional Steel Research
	2022-04-01
卷号	191
关键词	Coatings Computation theory Earthquakes Fire resistance Plates (structural components) Reinforcement Thickness measurement Transient analysis Computation model Critical temperatures Doubler plates Doubler-plate reinforced SHS T-joint Gradient temperature Plate reinforced Post-earthquake fire resistance Post-earthquake fires T joints T-joints
ISSN号	0143-974X
DOI	10.1016/j.jcsr.2022.107195
英文摘要	The earthquake usually causes serious damage on the T-joints in structure, which may reduce its fire resistance. Moreover the gradient temperature distribution for reinforced SHS T-joints appears under a fire. Therefore it is very necessary to evaluate the fire resistance of reinforced SHS T-joint considering gradient temperature effect under post-earthquake fire (PEF). The objective of this paper is to investigate the fire resistance of earthquake-damaged doubler-plate reinforced SHS T-joints considering gradient temperature effect. A computation model was established and validated using the existing experimental results. The gradient-temperature field distribution against reinforced SHS T- joints was conducted by transient-response analysis method, then a parametric study was carried out using 30 established computation models involving following dimensionless parameters such as the width ratio of brace to chord (δ), diameter to thickness ratio of chord (ζ), wall thickness ratio of doubler-plate to chord (α), wall thickness ratio of brace to chord (Ε), length ratio of doubler-plate to chord (ξ), ratio of chord length to chord width (φ), welding effect, damage variable (D~) and fire retardant coating thickness. The results demonstrated that damage variable and fire retardant coating thickness had a great influence on the fire resistance of doubler-plate reinforced SHS T-joints, the parameters δ, ζ and α had a major influence on reinforced SHS T-joints. The findings can provide data support and theoretical reference for the design, maintenance and reinforcement of such joints. © 2022 Elsevier Ltd
WOS研究方向	Construction & Building Technology ; Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000761038500001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158007]
专题	土木工程学院教务处（创新创业学院）
作者单位	Department of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Xu, Jixiang,Jiang, Wang,Han, Jianping,et al. Fire resistance of reinforced SHS T-joints considering gradient temperature effect under post-earthquake fire[J]. Journal of Constructional Steel Research,2022,191.
APA	Xu, Jixiang,Jiang, Wang,Han, Jianping,&Wang, Jianjun.(2022).Fire resistance of reinforced SHS T-joints considering gradient temperature effect under post-earthquake fire.Journal of Constructional Steel Research,191.
MLA	Xu, Jixiang,et al."Fire resistance of reinforced SHS T-joints considering gradient temperature effect under post-earthquake fire".Journal of Constructional Steel Research 191(2022).