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接着剤を用いて固定したアンカーボルトの引抜き耐力

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.20 (1988) No.1

接着剤を用いて固定したアンカーボルトの引抜き耐力 Tensile Strength of Anchor Bolt Set by Adhesives

片岡 洋(Hiroshi Kataoka) 岡本 勝昭(Katsuaki Okamoto) 谷敷 多穂(Kazuho Tanishiki) 上赤 正和(Masakazu Kamiaka)

要旨 : 既存のコンクリート構造物を有効に利用するための技術の一つである接着剤を用いて固定 したアンカーボルトについて，引抜き荷重作用時における力学的な諸特性を，各種の引抜 き実験ならびに疲労実験を通じて調査した結果から破壊過程の推論および引抜き耐力の算 定を行い，以下の諸事項が明らかとなった。(1)ボルト素材に丸鋼を用いた場合，異形棒鋼 や全ネジ切り棒鋼に比べ，著しく引抜き耐力が低下する。(2)大口径（M90），小口径（M30） ともに，同様の耐力機構を有し，ボルト径の10 倍以上の穿孔長があれば実用上十分な引抜 き耐力が確保できる。(3)疲労特性はボルト素材の疲労特性と一致する。 Synopsis :

Through various pull-out tests and fatigue tests，a survey has been made for the mechanical characteristics of bolts set in bored holes using adhesive material, which are available in existing foundations. The results are given as follows: (1) When a round bar is used as material of the bolt, its tensile strength is decreased compared with that of the deformed dar or all-screw-cutting bar. (2) Both large-diameter(M90) and small-diameter(M30) bolts show the same failure mechanism, and when the length of the boring hole is ten times larger than its diameter, bolts tensile strength is sufficient for practical use. (3) The fatigue characteristics of the bolt are the same as those of the bolt material.

(c)JFE Steel Corporation, 2003

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