Mechanical behavior of square steel-reinforced concrete-filled steel tubular (SRCFST) members under compression-bending-shear loads

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	Mechanical behavior of square steel-reinforced concrete-filled steel tubular (SRCFST) members under compression-bending-shear loads
	Wang, Wenda; Ji, Sunhang; Shi, Yanli; Zhang, Chen
刊名	Tumu Gongcheng Xuebao/China Civil Engineering Journal
	2021
卷号	54 期号:1 页码:76-87
关键词	Axial compression Axial loads Beams and girders Concrete construction Shear flow Tubular steel structures Buckling deformation Compression bending Finite element analysis modeling Interaction forces Loading direction Mechanical behavior Steel reinforced concrete Working mechanisms
ISSN号	1000131X
英文摘要	To study the working mechanism of square steel-reinforced concrete-filled steel tubular (SRCFST) members under combined compression-bending-shear loads, a total of 10 square SRCFST specimens were tested.The influence laws of shear-span ratio, axial compression ratio and profiled steel section form on the horizontal capacity and failure modes of specimens were considered.The finite element analysis (FEA) model was established to simulate the testing results and employed to analyze the mechanical behaviors of typical specimen and subsequently the effects of various factors on the horizontal capacity were evaluated.The results showed that the SRCFST members exhibited good ductility, obvious buckling deformation appeared at the compressive side of the steel tube, and the combined effect between the profiled steel and core concrete was found.With the loading directions varying from strong axis to weak axis, an average decrease of 13% on the horizontal capacity of specimens was observed.After setting the stiffeners, the horizontal capacity of specimens increased with an average rate of 21%.During the loading process, the axial load redistributed, and most horizontal and axial loads were carried by the concrete.The interaction force between the profiled steel and the concrete was uneven, and a stronger interaction between the flange of profiled steel and the concrete occurred at the compression zone.Keeping the axial compression ratio constant, when the shear-span ratio was below 0.8, the horizontal capacity of specimens was significantly enhanced as the shear-span ratio decreased.When the axial compression ratio was less than 0.4, the horizontal capacity of SRCFST specimens was improved due to the existence of axial force. © 2021, Editorial Office of China Civil Engineering Journal. All right reserved.
语种	中文
出版者	Chinese Society of Civil Engineering
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147186]
专题	土木工程学院经济管理学院
作者单位	Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Wang, Wenda,Ji, Sunhang,Shi, Yanli,et al. Mechanical behavior of square steel-reinforced concrete-filled steel tubular (SRCFST) members under compression-bending-shear loads[J]. Tumu Gongcheng Xuebao/China Civil Engineering Journal,2021,54(1):76-87.
APA	Wang, Wenda,Ji, Sunhang,Shi, Yanli,&Zhang, Chen.(2021).Mechanical behavior of square steel-reinforced concrete-filled steel tubular (SRCFST) members under compression-bending-shear loads.Tumu Gongcheng Xuebao/China Civil Engineering Journal,54(1),76-87.
MLA	Wang, Wenda,et al."Mechanical behavior of square steel-reinforced concrete-filled steel tubular (SRCFST) members under compression-bending-shear loads".Tumu Gongcheng Xuebao/China Civil Engineering Journal 54.1(2021):76-87.