金属系あと施工アンカーの新工法とその強度について

概要

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Anchor bolts are usually embedded into concrete member to fix firmly the column base and building equipment, etc., and they should prevent the movement of each member. These anchor bolts are devided into two types. Namely, one is the usual anchor bolt embedded into concrete members before casting concrete. The other is one that is attached to members after casting concrete. The latter is also devided into two. One is so called "chemical anchor", which make use of an adhesive agent, and the other is an expansion bolt, which is attatched by the friction of wedging into concrete member. Expansion bolts are, however, not reliable, because they depend upon the skill of workman, i.e. workmanship. Expansion bolts easily tend to pull out, when the workmanship is not sufficient. In this paper, the authors examine the new method of expansion bolts, that is, drilling the hole like reverse wedge shape, and expecting the toothing effect by it. The experimental results are described in detail, especially pull-out testing of each expansion bolts and clarify the advantage of this new method.
福山大学の論文