Axial compression tests on seawater and sea sand concrete-filled double-skin stainless steel circular tubes. (1st December 2018)

• Record Type: Journal Article
• Authors: Li, Y.L.; Zhao, X.L.; Singh Raman, R.K.; Yu, X.
• Is Part Of: Engineering structures. Volume 176(2018)
• Page Start: 426
• Page End: 438
• Publication Date: 2018-12-01
• Subjects: Seawater and sea sand concrete (SWSSC) -- Stainless steel (SS) -- Double-skin tubes -- Axial compression; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2018.09.040
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Tests were performed on seawater and sea sand concrete filled double-skin stainless steel tubes. Load-axial strain curves, post-peak behaviour and energy absorption are investigated. The effects of confinement factor, void ratio and tube slenderness are studied. Formulas are proposed to estimate the load carrying capacity of such short columns. Abstract: Seawater and sea sand concrete (SWSSC) filled double-skin stainless steel (SS) tubes consist of two concentric circular SS tubes, sandwiching SWSSC between them. This paper presents an experimental study on SWSSC-filled double-skin SS tubes (CFDSTs) under axial compression. Unfilled circular hollow sectional (CHS) specimens, fully-filled tubes (CFSTs) and double-skin tubes without inner tube (CFHT) were also tested for comparison purpose. Load-axial strain curves, stress in concrete, post-peak behaviour and energy absorption are investigated in this study. The effects of some key parameters, including confinement factor, void ratio and tube slenderness ratio, on the structural behaviour of SWSSC-filled SS tubes are discussed. It is found that the ultimate stress in concrete is mainly affected by confinement factor and the post-peak behaviour depends on both confinement factor and inner tube slenderness. Formulas are proposed to estimate the load carrying capacity of SWSSC-filled SS circular tubes in compression.