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Title |
Evaluation of Seismic Performance of Torque-Controlled Expansion Anchor Using Simulated Seismic Tension Tests
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Authors |
채경훈(Kyoung-Hun Chae) ; 안영승(Yeong-Seung An) ; 박태원(Tae-Won Park) ; 허무원(Moo-Won Heo) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.3.363 |
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Keywords |
비틀림 제어 확장앵커; 모의 지진 인장시험; 내진성능; 잔류인장강도 torque-controlled expansion anchor; simulated seismic tension test; seismic performance; residual tension strength |
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Abstract |
In this study, an experimental investigation was conducted to evaluate the seismic performance of torque-controlled expansion anchors with improved structural details, including modified sleeves and heads. The seismic performance was evaluated according to established evaluation guidelines by conducting repeated force application tests and residual strength tests, following the concrete design method and simulated seismic tension procedures specified in the Example Book (KCI-M-24-018). None of the anchors were damaged or broken during the repeated loading tests. In the residual strength tests, the average residual tensile strength of all anchors was found to be greater than or equal to the evaluation criteria. The final failure mode was identified as concrete breakout, which was judged to have contributed to the anchors’ high seismic tensile resistance by effectively countering the effects of cracking and repeated loading. In addition, when comparing the experimental value (NTest) with the design value (NKDS) according to the domestic anchor design standard, it was confirmed that the strength was about 1.36 times and 1.43 times higher. These findings confirm that torque-controlled expansion anchors with improved structural details exhibit excellent seismic performance and can be effectively applied in structures requiring seismic design considerations.
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