Torsional behaviour of tapered CFDST members with large void ratio

doi:10.1016/j.jobe.2022.104434

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Torsional behaviour of tapered CFDST members with large void ratio
	Fan, Jia-Hao 1; Wang, Wen-Da 1,2; Shi, Yan-Li 1,2; Ji, Sun-Hang 1
刊名	Journal of Building Engineering
	2022-07-15
卷号	52
关键词	Axial compression Concretes Failure modes Shear flow Shear strain Stress-strain curves Tubular steel structures Concrete-filled Concrete-filled double skin steel tubular Double skin Equivalent calculations Finite element analyse Hollow ratios Performance Tapered member Torsional behaviors Torsional performance
DOI	10.1016/j.jobe.2022.104434
英文摘要	This paper investigated the mechanical behaviour of tapered concrete-filled double skin steel tubular (CFDST) members under combined axial compression and torsion. A series of experiments on CFDST specimens were tested including 8 tapered members and 2 normal members with various hollow ratios and axial compression ratios. The torsional performance of tapered members was analyzed on failure modes, torque-rotation angle curves, and torque-shear strain curves. Verified FE models were developed to carry out the full-range analysis, stress and strain distribution, and the contact stresses between the components. The results showed that the failure mode of tapered CFDST columns was the torsional deformation occurred between 0.5H and the top section. The specimens with a high axial compression ratio occurred additionally inclined outward buckling at 0.8H section, giving rise to a decline in torsional capacity. A low level of axial force promotes the torsional bearing capacity. The effects of the taper angle and hollow ratio on the distribution of shear strain and the torsional capacity at different heights are obvious. Furthermore, employing the section with the lowest torsional modulus for tapered CFDST members is conservative as the designed section, because the torsional capacity might be underestimated. Finally, a simplified method defined by a new calculated section for forecasting the torsional performance of tapered CFDST members is proposed. © 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:000807453600003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158036]
专题	土木工程学院
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Fan, Jia-Hao,Wang, Wen-Da,Shi, Yan-Li,et al. Torsional behaviour of tapered CFDST members with large void ratio[J]. Journal of Building Engineering,2022,52.
APA	Fan, Jia-Hao,Wang, Wen-Da,Shi, Yan-Li,&Ji, Sun-Hang.(2022).Torsional behaviour of tapered CFDST members with large void ratio.Journal of Building Engineering,52.
MLA	Fan, Jia-Hao,et al."Torsional behaviour of tapered CFDST members with large void ratio".Journal of Building Engineering 52(2022).