Tests of concrete-filled stainless steel tubular T-joints

Investigation on square concrete filled double-skin steel tube (CFDST) subjected to local bearing force: Experiments

“…Comparisons of force transfer mechanism between square CFDST under local bearing forces in this paper and other composite specimens under local bearing or locally axial loading, i.e., in [3,[16][17][18], are demonstrated in Fig. 8.…”

“…The test results of square CFST under local bearing forces were presented in Yang et al [17]. Feng and Young [18][19] carried out the experimental and theoretical studies of concrete filled stainless steel tubular joints with square and rectangular brace and chord members subjected to compression. The performance and design calculations of rectangular CFST under local bearing forces were reported by Packer [20].…”

Behaviour of concrete-filled stainless steel tubular X-joints subjected to compression

“…Design rules in the CIDECT [3], which is the only existing design guideline for concrete-filled tubular joints do not include any definition of failure modes for concrete-filled tubular joints. The determination of failure load (N f ) proposed by Feng and Young [9] for concrete-filled stainless steel tubular T-joints is adopted in this study for concrete-filled stainless steel tubular X-joints. If the maximum test strength (N max ) at a deformation smaller than 3%b 0 , the maximum test strength is considered to be the failure load; if the maximum test strength (peak load) at a deformation larger than 3%b 0 , the test strength N 3%b0 at the deformation of 3%b 0 is considered to be the failure load.…”

Punching Shear Mechanism Based Design of Concrete-Filled CHS T-Joints under In-Plane Bending

“…In transmission towers, poles and arch bridges [4], hollow or CFST chords and braces are commonly connected by welds. Previous investigations [5][6][7][8][9] demonstrated the radial stuffiness of chord member and the capacity of composite joints could be significantly improved when compared with the hollow section counterparts, despite that the inner concrete does not provide the direct tensile or compressive resistance to the external actions. The typical failure modes of composite joints were brace failure [5,6] and crushing of inner concrete [5,7] in the case of axial compression and punching shear in the case of axial tension [6][7][8][9].…”