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	Experimental study on the seismic behavior of high strength concrete fi lled double-tube columns
	Qian Jiaru ; Li Ningbo ; Ji Xiaodong ; Zhao Zuozhou ; Qian Jiaru ; Li Ningbo ; Ji Xiaodong ; Zhao Zuozhou
	2016-03-30 ; 2016-03-30
关键词	high strength concrete fi lled double-tube(CFDT)column seismic behavior area ratio of the square steel tube width-to-thickness ratio of the square steel tube axial force ratio quasi-static test TU398.9 TU352.11
其他题名	Experimental study on the seismic behavior of high strength concrete fi lled double-tube columns
中文摘要	To study the seismic behavior of high strength concrete fi lled double-tube(CFDT) columns,each consisting of an external square steel tube and an internal circular steel tube,quasi-static tests on eight CFDT column specimens were conducted.The test variables included the width-to-thickness ratio(β1) and the area ratio(β2) of the square steel tube,the wall thickness of the circular steel tube,and the axial force(or the axial force ratio) applied to the CFDT columns.The test results indicate that for CFDT columns with a square steel tube with β1 of 50.1 and 24.5,local buckling of the specimen was found at a drift ratio of 1/150 and 1/50,respectively.The lateral force-displacement hysteretic loops of all specimens were plump and stable.Reducing the width-to-thickness ratio of the square steel tube,increasing its area ratio,or increasing the wall thickness of the internal circular steel tube,led to an increased fl exural strength and deformation capacity of the specimens.Increasing the design value of the axial force ratio from 0.8 to 1.0 may increase the fl exural strength of the specimens,while it may also decrease the ultimate deformation capacity of the specimen with β1 of 50.1.; To study the seismic behavior of high strength concrete fi lled double-tube(CFDT) columns,each consisting of an external square steel tube and an internal circular steel tube,quasi-static tests on eight CFDT column specimens were conducted.The test variables included the width-to-thickness ratio(β1) and the area ratio(β2) of the square steel tube,the wall thickness of the circular steel tube,and the axial force(or the axial force ratio) applied to the CFDT columns.The test results indicate that for CFDT columns with a square steel tube with β1 of 50.1 and 24.5,local buckling of the specimen was found at a drift ratio of 1/150 and 1/50,respectively.The lateral force-displacement hysteretic loops of all specimens were plump and stable.Reducing the width-to-thickness ratio of the square steel tube,increasing its area ratio,or increasing the wall thickness of the internal circular steel tube,led to an increased fl exural strength and deformation capacity of the specimens.Increasing the design value of the axial force ratio from 0.8 to 1.0 may increase the fl exural strength of the specimens,while it may also decrease the ultimate deformation capacity of the specimen with β1 of 50.1.
语种	英语 ; 英语
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/148819]
专题	清华大学
推荐引用方式 GB/T 7714	Qian Jiaru,Li Ningbo,Ji Xiaodong,et al. Experimental study on the seismic behavior of high strength concrete fi lled double-tube columns[J],2016, 2016.
APA	Qian Jiaru.,Li Ningbo.,Ji Xiaodong.,Zhao Zuozhou.,Qian Jiaru.,...&Zhao Zuozhou.(2016).Experimental study on the seismic behavior of high strength concrete fi lled double-tube columns..
MLA	Qian Jiaru,et al."Experimental study on the seismic behavior of high strength concrete fi lled double-tube columns".(2016).

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