A Study on the Applicability of Double Flare-Bevel-Groove Welds to D51 Rebar

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  • Tosaki Takayuki
    東海旅客鉄道株式会社（株）中央新幹線建設部
  • Sato Koji
    東海旅客鉄道株式会社（株）静岡新幹線構造物検査センター
  • Nihei Tatsuya
    公益財団法人鉄道総合技術研究所
  • Ikeda Manabu
    公益財団法人鉄道総合技術研究所 鉄道力学研究部 構造力学研究室

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Other Title
  • 施工条件を考慮したK形フレア溶接のD51鉄筋への適用性に関する検討

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<p>In this study, we considered the applicability of double flare-bevel-groove welds to D51 rebar. First, to investigate the effect of welding posture, some welding experiments were done. From the result, it was confirmed that reduction of the throat thickness by 1.7 mm is required when calculating weld leg length. Next, to establish the design embedment length of D51 rebar with double flare-bevel-groove welds, tensile test and repeated tensile test were conducted in accordance with applicable Japanese technical guidelines. As a result, it was confirmed that 5 times the rebar diameter suffices as the embedment length of D51. Finally, in double flare-bevel-groove welds, eccentric bending moment is caused by the difference in the centroid position between the rebar and steel plate, so we proposed a method for calculating the required steel plate thickness to prevent steel plate yielding over the service period.</p>

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