Compressive behavior of square CFST column with encased profiled steel under preload and sustained load

doi:10.14006/j.jzjgxb.2019.S1.018

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Compressive behavior of square CFST column with encased profiled steel under preload and sustained load
	Jia, Zhilu; Shi, Yanli; Wang, Wenda
刊名	Jianzhu Jiegou Xuebao/Journal of Building Structures
	2019-09-25
卷号	40 页码:141-148
关键词	ABAQUS Failure (mechanical) Finite element method Tubular steel structures Compressive behavior Concrete filled steel tube Concrete-filled steel tubular Long-term loadings Material constitutive models Mechanical behavior Mechanical mechanisms Square CFST columns
ISSN号	10006869
DOI	10.14006/j.jzjgxb.2019.S1.018
英文摘要	In order to study the mechanical behavior of square concrete filled steel tubular (CFST) members with encased profiled steel under preload and sustained load, based on the rational material constitutive model, the finite element model considering two loads was established with software ABAQUS. The validity of the finite element model was verified by relevant tests. On this basis, the mechanical mechanism and failure modes of typical square CFST stub column with encased profiled steel are analyzed. In addition, the bearing capacity of the member is respectively compared with the member of instant loading and square CFST stub column considering preload and sustained load. The results show that after considering the preload and sustained load, deformation of the member occurs already in the preload and long-term loading stage; in the long-term load-keeping stage, steel tube and profiled steel mainly bear load, and the creep rate is small in this stage. In the reloading stage, concrete mainly undertakes load. Compared with the instant loading, the increase of ultimate strength of the specimen is not significant, but the ultimate strength of the specimen increases obviously compared with the concrete filled steel tube. The existence of profiled steel effectively restrains the transverse expansion of concrete. © 2019, 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/113894]
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	Jia, Zhilu,Shi, Yanli,Wang, Wenda. Compressive behavior of square CFST column with encased profiled steel under preload and sustained load[J]. Jianzhu Jiegou Xuebao/Journal of Building Structures,2019,40:141-148.
APA	Jia, Zhilu,Shi, Yanli,&Wang, Wenda.(2019).Compressive behavior of square CFST column with encased profiled steel under preload and sustained load.Jianzhu Jiegou Xuebao/Journal of Building Structures,40,141-148.
MLA	Jia, Zhilu,et al."Compressive behavior of square CFST column with encased profiled steel under preload and sustained load".Jianzhu Jiegou Xuebao/Journal of Building Structures 40(2019):141-148.