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Title |
The Influence of Unbonded Prestressing Force on the Lateral Torsional Stability of Girders
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Authors |
이종한(Jong-Han Lee) ; 이건준(Kun-Joon Lee) ; 카부야야 키쿠타(Kabuyaya Kighuta) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.3.008 |
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Keywords |
횡비틀림 안정성 ; 임계하중 ; 긴장력 ; 비부착 텐던 ; 거더 Lateral torsional stability ; Critical load ; Prestressing force ; Unbonded tendon ; Girder |
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Abstract |
An experiment was carried out to evaluate the lateral torsional stability of a girder with respect to the location and magnitude of prestressing force. The test of evaluating the lateral displacement and stability of a girder could cause an unexpected result due to various parameters, such as material nonlinearity, initial geometric imperfections, prestressing force, and loading and support conditions. Therefore, a small model testing was programmed to control the various parameters and assess the lateral torsional stability with respect to the prestressing force. This study proposed and fabricated an experimental apparatus that can satisfy the loading and in-plane and out-of-plane support conditions and also contol the prestressing force. The result of the experiment showed that the lateral torsional stability increased when the prestressing force was applied in the bottom flange of the girder. As a result, this study proposed an analytical equation that can account for the effect of the prestressing force in the lateral torsional stability of a girder.
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