Fire resistance of tubular T-joints with internal single ring stiffener under post-earthquake fire

doi:10.14006/j.jzjgxb.2020.0456

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Fire resistance of tubular T-joints with internal single ring stiffener under post-earthquake fire
	Xu, Jixiang; Wang, Jianjun; Han, Jianping
刊名	Jianzhu Jiegou Xuebao/Journal of Building Structures
	2021-08-05
卷号	42 期号:8 页码:213-222
关键词	Earthquakes Failure (mechanical) Reinforcement Rings (components) Temperature Tubular steel structures Critical temperatures Earthquake damages Fire resistance analysis Fire resistance performance Post-earthquake fires Pushover analysis method Residual deformation Wall thickness ratios
ISSN号	10006869
DOI	10.14006/j.jzjgxb.2020.0456
英文摘要	To analyze the fire resistance performance of tubular T-joints with internal single ring stiffener considering earthquake damage, finite element analysis (FEA) was carried out to verify the calculation model of internal single ring stiffener tubular T-joints by using existing test results. According to the application of tubular T-joints in engineering field, important parameters, i. e., brace to chord wall thickness ratio, brace to chord diameter ratio, chord diameter to twice wall thickness ratio, and reinforcement ring thickness to chord wall thickness ratio, were selected to study the influence on the fire resistance of the tubular T-joint. Then, setting the parameters in a reasonable range, using the Pushover analysis method considering the earthquake damage, and introducing the damage variable, the residual stress and residual deformation caused by the earthquake were transferred to the fire resistance analysis by the restart analysis method in ANSYS. The critical temperature, fire resistance and failure mechanism of tubular T-joints with internal single ring stiffener under different damage variables and parameters were studied comprehensively. The results show that the damage variable has a great influence on the fire resistance performance of tubular T-joints with internal single ring, and the critical temperature decreases greatly with the increase of the damage variable. The effect of brace to chord wall thickness ratio on the fire resistance of tubular T-joints with internal single ring is not obvious. With the increase of brace to chord diameter ratio and reinforcement ring thickness to chord wall thickness ratio, the critical temperature decreases. The critical temperature increases obviously when the chord diameter to twice wall thickness ratio increases. © 2021, Editorial Office of Journal of Building Structures. All right reserved.
语种	中文
出版者	Science Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150757]
专题	土木工程学院教务处（创新创业学院）
作者单位	College of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Xu, Jixiang,Wang, Jianjun,Han, Jianping. Fire resistance of tubular T-joints with internal single ring stiffener under post-earthquake fire[J]. Jianzhu Jiegou Xuebao/Journal of Building Structures,2021,42(8):213-222.
APA	Xu, Jixiang,Wang, Jianjun,&Han, Jianping.(2021).Fire resistance of tubular T-joints with internal single ring stiffener under post-earthquake fire.Jianzhu Jiegou Xuebao/Journal of Building Structures,42(8),213-222.
MLA	Xu, Jixiang,et al."Fire resistance of tubular T-joints with internal single ring stiffener under post-earthquake fire".Jianzhu Jiegou Xuebao/Journal of Building Structures 42.8(2021):213-222.