TY - GEN
T1 - Stainless steel circular tubular stub columns infilled with seawater sea-sand concrete
T2 - 2025 International Association for Bridge and Structural Engineering, IABSE 2025
AU - Cai, Yancheng
AU - Kwan, Albert K.H.
N1 - Publisher Copyright:
© 2025 IABSE Congress Ghent 2025: The Essence of Structural Engineering for Society, Proceedings. All rights reserved.
PY - 2025
Y1 - 2025
N2 - Due to the acute shortage of fresh water and river sand in many places, especially remote islands, and the large carbon footprint of cement manufacturing, which has been causing global warming, it has been advocated in recent years to reduce fresh water, river sand and cement consumptions. Herein, it is proposed to infill seawater sea-sand concrete (SWSSC) into stainless steel tubes to form concrete-filled steel tubes, which should have the advantages of reduced fresh water, river sand and cement consumptions. A series of austenitic stainless steel circular tubular stub columns infilled with SWSSC were tested. The test results revealed that the use of SWSSC in place of conventional concrete in stainless steel tubes has little effect on the structural behaviour. A new design equation for stainless steel tubes infilled with different types of concrete, including SWSSC were proposed, which provided more accurate strength predictions than the existing design equations.
AB - Due to the acute shortage of fresh water and river sand in many places, especially remote islands, and the large carbon footprint of cement manufacturing, which has been causing global warming, it has been advocated in recent years to reduce fresh water, river sand and cement consumptions. Herein, it is proposed to infill seawater sea-sand concrete (SWSSC) into stainless steel tubes to form concrete-filled steel tubes, which should have the advantages of reduced fresh water, river sand and cement consumptions. A series of austenitic stainless steel circular tubular stub columns infilled with SWSSC were tested. The test results revealed that the use of SWSSC in place of conventional concrete in stainless steel tubes has little effect on the structural behaviour. A new design equation for stainless steel tubes infilled with different types of concrete, including SWSSC were proposed, which provided more accurate strength predictions than the existing design equations.
KW - Concrete-filled steel tubes
KW - confinement effects
KW - design
KW - seawater sea-sand concrete
KW - stainless steel structures
UR - https://www.scopus.com/pages/publications/105021083568
U2 - 10.2749/ghent.2025.2458
DO - 10.2749/ghent.2025.2458
M3 - Conference contribution
AN - SCOPUS:105021083568
T3 - IABSE Congress Ghent 2025: The Essence of Structural Engineering for Society, Proceedings
SP - 2458
EP - 2466
BT - IABSE Congress Ghent 2025
A2 - Leonetti, Davide
A2 - Snijder, Bert
A2 - De Pauw, Bart
A2 - De Pauw, Bart
A2 - van Alphen, Sander
Y2 - 27 August 2025 through 29 August 2025
ER -