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|Title:||Fatigue and residual strength of concrete-filled tubular X-joints with full capacity welds||Authors:||Qian, X.
Fatigue crack initiation
Fatigue crack propagation
Full capacity welds
|Issue Date:||2014||Citation:||Qian, X., Jitpairod, K., Marshall, P., Swaddiwudhipong, S., Ou, Z., Zhang, Y., Pradana, M.R. (2014). Fatigue and residual strength of concrete-filled tubular X-joints with full capacity welds. Journal of Constructional Steel Research 100 : 21-35. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcsr.2014.04.021||Abstract:||This paper presents the experimental findings on the fatigue performance and residual strength of the circular hollow section X-joints with a concrete-filled chord. The welding profile along the brace-to-chord intersection employs a recently proposed set of welding details, namely the full capacity tubular joint welds. The experimental investigation focuses on: 1) the stress concentration comparison corresponding to different stages of the specimen preparation, 2) the fatigue crack initiation life and propagation life; and 3) the comparison of the measured fatigue life with respect to the design S-N curves. The experimental measurement reveals that the fatigue crack propagation life contributes to a significant portion of the total fatigue life for both the hollow section tubular joints and the concrete-filled tubular joints. The total fatigue life of the test specimens complies with the life estimation based on the existing design S-N curves, originally developed for tubular joints fabricated using the complete joint penetration welds. The residual strength of the fatigue-cracked tubular joints follows approximately a linear relationship with respect to the percentage of the crack area along the brace-to-chord intersection. © 2014 Elsevier Ltd.||Source Title:||Journal of Constructional Steel Research||URI:||http://scholarbank.nus.edu.sg/handle/10635/90970||ISSN:||0143974X||DOI:||10.1016/j.jcsr.2014.04.021|
|Appears in Collections:||Staff Publications|
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