JP6741198B2 - 既設鋼構造物の亀裂補修方法 - Google Patents
既設鋼構造物の亀裂補修方法 Download PDFInfo
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また、上記した亀裂補修方法では、ストップホールとは別に、I型鋼の腹板及び一対の当て板に複数のボルト挿通孔を形成する必要があることから、この孔開け作業が煩雑なものとなっているという問題があり、これらの問題を解決することが従来の課題となっている。
図1は、本発明の一実施形態に係る既設鋼構造物の亀裂補修方法で用いる補修用レーザ溶接装置を示している。
なお、既設鋼構造物の構造物鋼材Wの化学組成が既知である場合には、この組成認識工程S1は省略することができる。
L レーザ光
W 構造物鋼材
W1 経年模擬試験体(試験鋼材)
Wa 亀裂
Wb 溶接部
Claims (4)
- 既設鋼構造物の構造物鋼材に生じた亀裂を補修する亀裂補修方法であって、
化学組成が認識された前記既設鋼構造物の前記構造物鋼材から採取した試験鋼材又は該構造物鋼材と同じ化学組成の試験鋼材に対して溶加材を用いた試験補修用溶接を行う試験施工工程と、
前記試験施工工程で用いた前記溶加材の化学組成及び溶接部における前記溶加材の添加量に起因する溶接欠陥の発生の危険性を指標に基づいて把握する溶加材評価工程と、
前記溶加材評価工程で把握した評価結果に基づいて前記既設鋼構造物の前記構造物鋼材に対する補修用溶接で用いる補修用溶加材及び該補修用溶加材の添加量を決定する溶加材仕様決定工程と、
前記既設鋼構造物の前記構造物鋼材に生じた前記亀裂の部分に対して、前記溶加材仕様決定工程で決めた前記補修用溶加材を決めた添加量で送給しつつ前記補修用溶接を行う補修用溶接工程を経る既設鋼構造物の亀裂補修方法。 - 前記試験補修用溶接及び前記補修用溶接がいずれもレーザ溶接である請求項1に記載の既設鋼構造物の亀裂補修方法。
- 前記既設鋼構造物の前記構造物鋼材の化学組成を調べる組成認識工程を含む請求項1又は2に記載の既設鋼構造物の亀裂補修方法。
- 前記溶加材仕様決定工程では、前記試験施工工程で用いた前記溶加材とは化学組成が異なるものを補修用溶加材として採用するか、前記試験施工工程で用いた前記溶加材と同じものを前記試験施工工程とは異なる量で添加するか、前記試験施工工程で用いた前記溶加材とは化学組成が異なる前記補修用溶加材を前記試験施工工程とは異なる量で添加するかのいずれかを決定する請求項1〜3のいずれか一つの項に記載の既設鋼構造物の亀裂補修方法。
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