Research on mechanical behaviour of tapered concrete-filled double skin steel tubular members with large hollow ratio subjected to bending

doi:10.1016/j.jcsr.2021.106689

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	Research on mechanical behaviour of tapered concrete-filled double skin steel tubular members with large hollow ratio subjected to bending
	Wang, Wen-Da 1,2; Fan, Jia-Hao 1; Shi, Yan-Li 1,2; Xian, Wei 1
刊名	Journal of Constructional Steel Research
	2021-07-01
卷号	182
关键词	ABAQUS Behavioral research Finite element method Concrete-filled Double skin Equivalent calculations Experimental study Finite elements analysis Flexural capacity Hollow ratios Mechanical behavior Tapered concrete-filled double skin steel tubular member Tubular members
ISSN号	0143-974X
DOI	10.1016/j.jcsr.2021.106689
英文摘要	This paper reports a study on the mechanical behaviour of tapered concrete-filled double skin steel tubular (CFDST) members under bending. A total of twelve specimens with diverse hollow ratios and shear span ratios were tested. The failure mode, the distribution of the deflection curves, the bending moment-curvature curves (M-φ), the longitudinal stress distribution of the cross-section and the strain were investigated, respectively, to understand the bending performance and working mechanism of the specimens. Meanwhile, the finite element (FE) models of tapered CFDST members were developed to investigate the flexural behaviour by ABAQUS software. Finally, the calculation method for predicting the flexural capacity of tapered CFDST members was proposed. The results show that tapered CFDST specimen fails in a very ductile manner and no tensile fracture is observed at the tension region. The maximum deflection of tapered CFDST members occurs at the 3/4L0 section. Moreover, it is found that the flexural capacity is sensitive to the change of taper angle and hollow ratio due to the variation of flexure stiffness. For instance, ultimate bending capacity can be decreased by 62.6% when the taper angle changes from 0° to 1.71°. In addition, it is not reliable to directly select the minimum section of tapered CFDST members as designed section, which will underestimate the flexural capacity of the specimens. Therefore, the concept of equivalent section is proposed to predict the calculation, and the predicted results are satisfactorily in accordance with the measured results, which can provide certain reference for engineering design. © 2021 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:000663094000002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148443]
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; 730050, China
推荐引用方式 GB/T 7714	Wang, Wen-Da,Fan, Jia-Hao,Shi, Yan-Li,et al. Research on mechanical behaviour of tapered concrete-filled double skin steel tubular members with large hollow ratio subjected to bending[J]. Journal of Constructional Steel Research,2021,182.
APA	Wang, Wen-Da,Fan, Jia-Hao,Shi, Yan-Li,&Xian, Wei.(2021).Research on mechanical behaviour of tapered concrete-filled double skin steel tubular members with large hollow ratio subjected to bending.Journal of Constructional Steel Research,182.
MLA	Wang, Wen-Da,et al."Research on mechanical behaviour of tapered concrete-filled double skin steel tubular members with large hollow ratio subjected to bending".Journal of Constructional Steel Research 182(2021).