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
	2021
发表期刊	Tumu Gongcheng Xuebao/China Civil Engineering Journal
ISSN	1000131X
卷号	54 期号:1 页码:76-87
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.
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
收录类别	EI
语种	中文
出版者	Chinese Society of Civil Engineering
EI入藏号	20210609878331
EI主题词	Reinforced concrete
EI分类号	408 Structural Design - 408.2 Structural Members and Shapes - 412 Concrete - 631.1 Fluid Flow, General
来源库	Compendex
文献类型	期刊论文
条目标识符	https://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
第一作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
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.