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μθ»“S‹Z•ρ
KAWASAKI STEEL GIHO
Vol.6 (1974) No.1
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”–“χƒnƒCƒuƒŠƒbƒhEƒK[ƒ_[‚Μ”ζ˜J‹­“x‚ΙŠΦ‚·‚ιŒ€‹†
Study on the Fatigue Strength of Thin-walled Hybrid Plate Girders

‘O“c@K—Y(Yukio Maeda)@Ξ“n@³•v(Masao Ishiwata)@μˆδ@@–L(Yutaka Kawai)
—vŽ| :
ƒnƒCƒuƒŠƒbƒhŒ…‚Μ”ζ‚κ‹­‚³‚Ι‚¨‚ζ‚Ϊ‚·Ε‘ε‰ž—́C‰ž—͐U•C• ”ג·”δC…•½•β„ή„“x‚Μ‰e‹Ώ‚𒲂ׂ邽‚߁Cˆψ’£ƒtƒ‰ƒ“ƒW‚Ι80kg/mm2‹‰Ε‚’£—͍|Cˆ³kƒtƒ‰ƒ“ƒW60kg/mm2‹‰‚’£—͍|C• ”Β‚Ι•’ʍ|‚πŽg—p‚΅‚½‘εŒ^ŽŽŒ±Œ…‚U–{‚π—p‚’‚Δ‹Θ‚°”ζ˜JŽŽŒ±‚πs‚Θ‚Α‚½B“Ύ‚η‚κ‚½ŽŽŒ±Œ‹‰Κ‚ΝToprac‚Μ•ͺ—ނɏ]‚Α‚Δ”ζ˜J‹T—τ‚ΜŒ^‚πŒŸ“’‚·‚ι‚Ζ‚Ζ‚ΰ‚ɁCƒnƒCƒuƒŠƒbƒhŒ…‚ΜS-N‹Θό‚Ι‚Β‚’‚ΔŠω‰‚ΜŒ€‹†Œ‹‰Κ‚Ζ‚Μ”δŠr‚πs‚Θ‚Α‚½B‚»‚ΜŒ‹‰ΚC”ζ˜J”j‰σ‚͐‚’Ό•β„ή|• ”Β‚Μ‚·‚έ“χ—nΪ•”‚ɐΆ‚Ά‚½”ζ˜J‹T—τ‚©‚η‹N‚±‚ι‚±‚ƁC200–œ‰ρ‚ΜŒJ‚θ•Τ‚΅‚Ι‘Ξ‚·‚ι”ζ˜J‹­“x‚Ν‰ž—Ν‘SU•‚Ε12.9kg/mm2‚Ε‚ ‚θC‚±‚κ‚Ν80kg/mm2‹‰‚’£—͍|‚Μ’Pˆκ|ŽνŒ…‚Ι”δ‚Χ‚Ω‚Ϊ“―“™‚Μ‹­“x‚π‚ΰ‚Β‚±‚Ζ‚ͺ‚ν‚©‚Α‚½B‚ά‚½C‘εŒ^ŽŽŒ±Œ…‚Μ”ζ˜JŽŽŒ±Œ‹‰Κ‚́CƒŠƒu\ŽšŒ`‘O–Κ‚·‚έ“χ—nΪŒpŽθ‚̏¬Œ^ŽŽŒ±Œ‹‰Κ‚Ζ—Η‚’‘ŠŠΦ‚πŽ¦‚·‚±‚Ζ‚ͺ‚ν‚©‚Α‚½B
Synopsis :
An experimental study on thin-welled hybrid plate girders subjected to repeated loading is summarized. Six large-sized hybrid plate girders fabricated with 80 kg/mm2 class high strength steel (quenched and tempered) at a tension flange, SM-58 at a compression flange and SS-41 at a web are tested under repeated bending. Parameters investigated in this study are maximum stress, stress range, web slenderness ratio and rigidity ratio of longitudinal stiffener. Test results are discussed on the observed fatigue crack patterns according to the classification proposed by Toprac, and S-N curves for hybrid girders are developed and compared with several previous research data. Consequently, it is proved that the fatigue failures can be evaluated well from the crack at the transverse stiffener-to-web fillet weld below the neutral axis and fatigue strength at 2~10 6 cycles of these girders is 12.9kg/mm2 in stress range which is nearly equal in strength to homogeneous girders consisting of 80kg/mm2 class high strength steel. Moreover, a good correlation is observed in the fatigue test results between model specimens with transverse fillet welded attachments and large-sized girder specimens.
–{•ΆiPDF: 17P/626kbj




(c)JFE Steel Corporation, 2003