eprintid: 10184187
rev_number: 6
eprint_status: archive
userid: 699
dir: disk0/10/18/41/87
datestamp: 2023-12-19 14:52:12
lastmod: 2023-12-19 14:52:12
status_changed: 2023-12-19 14:52:12
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Zhang, JH
creators_name: Shao, YB
creators_name: Hassanein, MF
creators_name: Cashell, KA
creators_name: Hadzima-Nyarko, M
title: Behaviour of ultra-high strength concrete-filled dual-stiffened steel tubular slender columns
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F44
keywords: Ultra-high strength concrete, Stiffened tubes, Slender columns, Axial compression, Finite element analysis, Design resistance
note: © 2023 The Author(s). Published by Elsevier Ltd. under a Creative Commons license (http://creativecommons.org/licenses/by/4.0/).
abstract: This paper is concerned with the behaviour of square concrete-filled dual-stiffened steel tubular (CFDSST) slender columns with a concentrically-placed inner circular steel tube. Previous studies have illustrated that these columns have greater structural performance in terms of load-carrying capacity compared with conventional concrete-filled stiffened steel tubular (CFSST) columns. However, the behaviour of CFDSST slender columns filled with ultra-high strength concrete (UHSC) has not been investigated and current design codes do not include provisions for UHSC, although it is increasingly popular owing to demands for structures to be lighter and more sustainable. Accordingly, the current paper fills that gap in existing knowledge and explores the behaviour of CFDSST slender columns using finite element (FE) analysis. The available test results from previous studies were collated and are employed to validate the numerical model. The validated FE model is then employed to investigate the axial load versus deflection responses for a wide variety of UHS-CFDSST slender columns. The behaviour of both intermediate-length and long columns is assessed through parametric analyses. The results of these studies show that the strength of the concrete sandwiched between the two steel sections, the yield strength of outer steel tube, and the outer tube slenderness ratio have a significant effect on the axial resistance of UHS-CFDSST intermediate-length columns, while the capacity of long columns is most affected by the sandwiched concrete strength. The ultimate resistances are compared with different available design methods, and AISC 360–16 code is recommended for predicting the ultimate resistance of UHS-CFDSST slender columns with modifications proposed to account for the different components forming this innovative cross-section.
date: 2024-02
date_type: published
publisher: Elsevier BV
official_url: http://dx.doi.org/10.1016/j.engstruct.2023.117204
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2133724
doi: 10.1016/j.engstruct.2023.117204
lyricists_name: Cashell, Katherine
lyricists_id: KCASH63
actors_name: Flynn, Bernadette
actors_id: BFFLY94
actors_role: owner
full_text_status: public
publication: Engineering Structures
volume: 300
article_number: 117204
citation:        Zhang, JH;    Shao, YB;    Hassanein, MF;    Cashell, KA;    Hadzima-Nyarko, M;      (2024)    Behaviour of ultra-high strength concrete-filled dual-stiffened steel tubular slender columns.                   Engineering Structures , 300     , Article 117204.  10.1016/j.engstruct.2023.117204 <https://doi.org/10.1016/j.engstruct.2023.117204>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10184187/1/1-s2.0-S014102962301619X-main.pdf