비균열콘크리트에 매입된 중대형앵커의 콘크리트 인장파괴강도 평가 실험 연구

The 45-degree cone failure theory has been used for concrete anchor bolts design, but the CCD method was adopted since 2,000. However, the method was allowed only for anchor diameter less than 50mm and embedment depth less than 635mm because it is based on the experimental results from medium-to-small size anchor bolts. Actually, large size bolts greater than M50 have used in plant structures, therefore, it is necessary to develop a design equation for large-size anchor bolts. In this study, tension tests on M56 anchor bolts with effective embedment depth 400～450mm in uncracked concrete has been performed and evaluation of concrete breakout capacity on large-to-medium size anchor bolts together with the test results which was performed in Korea recently.