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Title |
Evaluation of the Pull-out Resistance of the SMA Wire Connector
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Authors |
정치영(Chi-Young Jung) ; 우태련(Tae-Ryeon Woo) ; 이종한(Jong-Han Lee) ; 정진환(Jin-Hwan Cheung) |
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DOI |
https://doi.org/10.11112/jksmi.2019.23.1.130 |
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Keywords |
형상기억합금 ; 인발실험 ; 프리캐스트 콘크리트 ; 부착면 Shape memory alloy ; Pull-out test ; Precast concrete ; Cold joint |
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Abstract |
Precast concrete (PC) structure is one of the type of the structures which is made in a facility prior to installing it to a construction field. The contact surfaces between two PC structures should be treated for obtaining enough binding force by inducing prestressing force. However, in the many cases, the contact surface causes the crack and leakage of water. These cracks and water leakage can cause the corrosion of the rebar, and the corrosion of the rebar can severely reduce the long-term durability. In this study, the SMA wire connector is suggested to solve the problem with the contact surfaces between two PC structures. The pull-out resistance of the suggested SMA wire connector is evaluated by conducting the tests to find the effect of the number of wires, shape of connector part, and shape memory effect. As a result of this study, the empirical formula is suggested to estimate the pull-out resistance related with the effects of the shape of the connector, shape memory effect, and the adhesive force. The validity between the estimated pull-out resistance and the measured value is confirmed.
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