Tests of stainless steel circular tubular stub columns with seawater sea-sand concrete infill

Yancheng Cai, Albert K.H. Kwan

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A series of cold-formed austenitic stainless steel (CFASS) circular tubular stub columns infilled with seawater sea-sand concrete (SWSSC) were designed, fabricated and tested. The CFASS circular tubes had 3 different cross-sections with its nominal outer diameter of 60.5, 114.3 and 165.2 mm. The concrete mixes were of strength levels 35 and 70 MPa. Axial compression tests were carried out to study their structural behaviour in terms of load-strain curve, strength, ductility and failure mode. The test results revealed that the use of SWSSC in place of conventional concrete in CFASS tubes has little effect on the structural behaviour. The test results were also compared with predictions by existing design equations in the codes. It was found that the existing design equations are either un-conservative or overly conservative. A new and more accurate design equation for axially loaded concrete-filled stainless steel circular tubular stub columns was proposed.

Original languageEnglish
Title of host publicationIABSE Symposium Manchester 2024
Subtitle of host publicationConstruction's Role for a World in Emergency
Pages1006-1014
Number of pages9
ISBN (Electronic)9783857482045
Publication statusPublished - 2024
EventIABSE Symposium Manchester 2024: Construction's Role for a World in Emergency - Manchester, United Kingdom
Duration: 10 Apr 202412 Apr 2024

Publication series

NameIABSE Symposium Manchester 2024: Construction's Role for a World in Emergency

Conference

ConferenceIABSE Symposium Manchester 2024: Construction's Role for a World in Emergency
Country/TerritoryUnited Kingdom
CityManchester
Period10/04/2412/04/24

Keywords

  • Concrete-filled steel tubes
  • seawater sea-sand concrete
  • stainless steel structures

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