Influence of substructure model on progressive collapse resistance of concrete-filled steel tube composite frame

doi:10.14006/j.jzjgxb.2020.S1.009

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Influence of substructure model on progressive collapse resistance of concrete-filled steel tube composite frame
	Zheng, Long; Wang, Wenda
刊名	Jianzhu Jiegou Xuebao/Journal of Building Structures
	2020-09-04
卷号	41 页码:76-88
关键词	Concrete construction Floors Metal working Structural dynamics Structural frames Tubular steel structures Boundary restraint Composite frame Concrete filled steel tube Concrete-filled steel tubes Material constitutive models Number of layers Progressive collapse Progressive collapse analysis
ISSN号	10006869
DOI	10.14006/j.jzjgxb.2020.S1.009
英文摘要	Both static tests and finite element (FE) analysis of substructures can be generally used for progressive collapse analysis of concrete-filled steel tube (CFST) structures. But different substructure models have influence on the results. In this paper, the progressive collapse resistance of CFST composite frames with different substructure models was analyzed by ABAQUS/Explicit module. On the basis of verified the material constitutive models and FE method, the single-column double-half span, three-column double-span, four-column three-span and five-column four-span plane substructure models were established to analyze the influence of different substructure models on the progressive collapse resistance of CFST plane frame. The progressive collapse resistances of single-column four-half span, five-column four-span and two-by-two-span CFST space substructure models were compared, and the effect of concrete floor and number of layers were analyzed. The results show that the boundary restraint can be determined by the selection of substructure model, which has a great influence on the progressive collapse resistance of CFST composite frames. The strong boundary restraints of single-column double-half span plane substructure and single-column four-half span space substructure enhance the bearing capacity in the early stage but weakens the deformability. Due to the enhanced boundary restraint, the ultimate chord angle and peak load of four-column three-span and five-column four-span plane substructures are greater than those of the three-columns double-span substructure, especially with concrete floor. Because of the constraint of corner column and the monolithic floor, the ultimate chord angle and peak load of two-by-two-span space substructure are greater than those of five-column four-span substructure, but the difference between five-columns four-span and two-by-two-span space substructures without concrete floor is small. With the increase of the number of layers, the ultimate chord angle and peak load of space substructure increase exponentially. © 2020, Editorial Office of Journal of Building Structures. All right reserved.
语种	中文
出版者	Science Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115040]
专题	土木工程学院
作者单位	School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zheng, Long,Wang, Wenda. Influence of substructure model on progressive collapse resistance of concrete-filled steel tube composite frame[J]. Jianzhu Jiegou Xuebao/Journal of Building Structures,2020,41:76-88.
APA	Zheng, Long,&Wang, Wenda.(2020).Influence of substructure model on progressive collapse resistance of concrete-filled steel tube composite frame.Jianzhu Jiegou Xuebao/Journal of Building Structures,41,76-88.
MLA	Zheng, Long,et al."Influence of substructure model on progressive collapse resistance of concrete-filled steel tube composite frame".Jianzhu Jiegou Xuebao/Journal of Building Structures 41(2020):76-88.