City Research Online

Abstract

Steel slag concrete‐filled stainless steel tube (SSC‐FSST), a novel sustainable configuration of composite columns, is developed in this study to simultaneously address durability and waste utilization challenges. It achieved an improvement of conventional concrete‐filled steel tubes, as well as the durability and aesthetic qualities of structural components through the use of industrial by‐products and corrosion‐resistant materials for sustainable development. Axial compression tests of typical specimens were conducted, with the cross‐sectional steel ratio () and the mass‐based steel slag coarse aggregate replacement ratio () as key experimental parameters. The test results indicate that circular SSC‐FSST stub columns exhibit comparable behavior and have a promising application in aggressive environmental conditions. Furthermore, specimens with higher values demonstrate improved behavior, and compared to their counterparts the SSC‐FSST specimens show an increase in bearing capacity by 1.1%–7.3%, a 4.5% improvement in composite elastic modulus, and a reduction in ultimate axial displacement ranging from 2.5% to 21.6%. A finite element (FE) model was subsequently constructed to gain deeper insights into the axial compressive behavior of circular SSC‐FSST stub columns. The simulation results, including local buckling of the outer tube, load‐deformation curves, and bearing capacity, showed reasonable agreement with the testing results. Finally, simplified formulae that can accurately compute bearing capacity of axially compressed circular SSC‐FSST stub columns were developed for design calculation.

Publication Type:	Article
Additional Information:	© 2025 International Federation for Structural Concrete. This is the peer reviewed version of the following article: Yang Y-F, Fu F. Compressive behavior and design of circular steel slag concrete-filled stainless steel tube (SSC-FSST) stub columns. Structural Concrete. 2025. https://doi.org/10.1002/suco.70448. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
Publisher Keywords:	circular cross-section, design calculation, experimental behavior, finite element (FE) modeling, steel slag concrete-filled stainless steel tube (SSC-FSST), stub columns
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Departments:	School of Science & Technology School of Science & Technology > Department of Engineering
SWORD Depositor:	Symplectic Administrator

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