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

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

IR > 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
	2020-09-04
发表期刊	Jianzhu Jiegou Xuebao/Journal of Building Structures
ISSN	10006869
卷号	41 页码:76-88
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.
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
DOI	10.14006/j.jzjgxb.2020.S1.009
收录类别	EI
语种	中文
出版者	Science Press
EI入藏号	20204109322970
EI主题词	Concretes
EI分类号	402 Buildings and Towers - 408 Structural Design - 408.2 Structural Members and Shapes - 412 Concrete - 535.2.2 Metal Forming Practice
来源库	Compendex
分类代码	402 Buildings and Towers - 408 Structural Design - 408.2 Structural Members and Shapes - 412 Concrete - 535.2.2 Metal Forming Practice
引用统计	无
文献类型	期刊论文
条目标识符	https://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
第一作者单位	土木工程学院
第一作者的第一单位	土木工程学院
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.