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      • KCI등재후보

        Deflection of Castellated I-Beams under Transverse Loading

        Ioannis G. Raftoyiannis,George I. Ioannidis 한국강구조학회 2006 International Journal of Steel Structures Vol.6 No.3

        The fatigue behaviour of thin-walled CHS-to-SHS T-joints (t < 4 m) under in-plane bending are studied in this paper. Thefailure modes observed in the fatigue tests are described. Surface crack growth was recorded at progressive stages of fatiguelife, from initiation, through-thickness life and end of test failure. The characteristics of fatigue crack initiation and propagationare described. The stress concentration factors (SCFs) along the weld toes at both the circular brace and the square chord are-dimensional joint parameters on SCFs are discussed. The resultant SCFs are compared to both the SCFs from CHS and RHSparametric formulae in IIW guidelines. Both the fatigue tests and FE analyses showed that the hot spot locations of the CHS-to-SHS T-joints were located at the weld toe of the square hollow section chord.

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