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鋼構造論文集 Vol. 23 (2016), No. 92

ISIJ International
belloff
オンライン版ISSN: 1884-0329
冊子版ISSN: 1880-9928
発行機関: Japanese Society of Steel Construction

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キーワードランキング

16 May. (Last 30 Days)

鋼構造論文集 Vol. 23 (2016), No. 92

面外ガセット溶接継手の疲労強度改善のための止端仕上げ範囲の検討

内田 大介, 森 猛, 佐々木 雄一

pp. 92_1-92_11

DOI:

10.11273/jssc.23.92_1

抄録

Various studies have been performed on improving fatigue strength of out-of-plane gusset welded joints because their fatigue strength is low in the case of as-welded condition. Grinding welded joint toes with burr grinder is conventional method for fatigue strength enhancement. In this study, for the purpose of proposing appropriate grinding area for out-of-plane gusset joints, fatigue tests and FEM analyses have been performed.

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面外ガセット溶接継手の疲労強度改善のための止端仕上げ範囲の検討

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Bibtex

Ris

グラインダー処理した溶融亜鉛めっき高力ボルト摩擦接合継手のすべり耐力試験

南 邦明, 横山 秀喜

pp. 92_13-92_19

DOI:

10.11273/jssc.23.92_13

抄録

Slip coefficient of high-strength bolt friction joints is well known to depend on the condition of contact surfaces. As for high-strength bolt friction joints of hot-dip galvanized coating, their contact surfaces have been widely treated by grid blast or phosphate. However, the slip coefficient with grinding treatment friction surfaces of hot-dip galvanized coating is not clear. In this study, the friction type of high strength bolted connection specimens were made on SS400 steel plates, in which contact surfaces are grinding treatment friction surfaces of hot-dip galvanized coating, then slip tests and relaxation tests were carried out on these specimens. On the basis of above examinations, the slip coefficient with grinding treatment surfaces is clarified.

mendeley

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グラインダー処理した溶融亜鉛めっき高力ボルト摩擦接合継手のすべり耐力試験

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Bibtex

Ris

渦流探傷試験結果のC-スコープ画像化による疲労き裂検出性能向上への試み

古東 佑介, 小西 拓洋, 三木 千壽, 関屋 英彦

pp. 92_21-92_30

DOI:

10.11273/jssc.23.92_21

抄録

In steel bridge, fatigue cracks are generally detected by magnetic particle test (MT). MT inspection is ineffective and cost consuming compared with other NDT such as eddy current test (ET). The cost reduction and efficiency of inspection can be achieved if fatigue cracks are detected using ET. It is one of the problems for ET that the accuracy of detection at weld zone decreases due to irregular beads noise. In addition, detection reliability of ET is inferior to MT because in ET inspection, inspector judges existence of flaw from change of eddy current signal in complex plane. In this study, the performance of ET was improved by converting detection signals to C-scope image by using position information.

mendeley

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渦流探傷試験結果のC-スコープ画像化による疲労き裂検出性能向上への試み

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mendeley

Bibtex

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16 May. (Last 30 Days)

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