Numerical performance of blind-bolted demountable square CFST K-joints

Jin，Dengyiding1; Hou，Chao1,2; Shen，Luming1; Han，Lin Hai3

2021

10.1016/j.jobe.2020.101646

Journal of Building Engineering   影响因子和分区

2352-7102

2352-7102

A demountable connection is an effective solution to separate and reuse steel or composite components after their first-stage design life, and could therefore benefit the environment by reducing material consumption and saving natural resources. Blind bolts and through-bolts are usually served as connectors in such demountable connections to replace traditional welding works. This paper puts forward a novel design on demountable square concrete-filled steel tubular (CFST) K-joints fabricated with concrete filled chord, hollow braces, flush endplate, blind bolts and through-wall bolts. Advanced finite element analysis models of the novel joints were established using verified modelling techniques. Among the investigated flush endplate designs and bolt arrangements, it is found that the design with through-bolt anchored beneath the tensile brace and a continuous flush endplate has advantages in material efficiency, joint strength and limiting endplate-chord separation, and is therefore chosen as the prototype design. Analysis on the failure modes shows that brace buckling failure prevents premature failure of the other members and ensures the safety as well as reusability of the main composite chord. Furthermore, discussions on the strength prediction based on numerical analysis and parametric study on key factors such as flush endplate thickness and brace-chord width ratio are given.

Blind bolt Composite K-Joints Demountable tubular connection Design recommendation Full-range numerical behavior

SCI ; EI

英语

通讯

National Natural Science Foundation of China (NSFC)[51838008] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0503]

Construction & Building Technology ; Engineering

Construction & Building Technology ; Engineering, Civil

WOS:000599864900004

ELSEVIER

20203108996803

Concretes ; Reusability

Concrete:412 ; Small Tools and Hardware:605

2-s2.0-85088657511

Scopus

1.School of Civil Engineering,The University of Sydney,2006,Australia
2.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Department of Civil Engineering,Tsinghua University,Beijing,100084,China

Jin，Dengyiding,Hou，Chao,Shen，Luming,et al. Numerical performance of blind-bolted demountable square CFST K-joints[J]. Journal of Building Engineering,2021,33.

Jin，Dengyiding,Hou，Chao,Shen，Luming,&Han，Lin Hai.(2021).Numerical performance of blind-bolted demountable square CFST K-joints.Journal of Building Engineering,33.

Jin，Dengyiding,et al."Numerical performance of blind-bolted demountable square CFST K-joints".Journal of Building Engineering 33(2021).