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Title |
Analytical Study on the Long-Term Deflection Control of Prestressed Concrete Bridge Girders
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Authors |
김태훈(Tae-Hoon Kim) ; 김기현(Ki-Hyun Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2021.33.5.501 |
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Keywords |
장기처짐; 제어; 프리스트레스트 콘크리트; 거더; 비선형 유한요소해석프로그램 long-term deflection; control; prestressed concrete; bridge girders; nonlinear finite element analysis program |
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Abstract |
This study presents the results of an analytical investigation of the long-term deflection control of prestressed concrete bridge girders. The excessive long-term deflection reduces the service life of bridge girders and leads to poorer passenger experience. To analyze the long-term behavior of prestressed concrete bridge girders, an analytical model that can simulate the effects of creep, shrinkage, and relaxation is introduced. For this purpose, a nonlinear finite element analysis program, RCAHEST (Reinforced Concrete Analysis in Higher Evaluation System Technology) was used. A 4-node quadrilateral flat shell finite element with drilling rotational stiffness was modified by a layered approach. The creep and shrinkage effects of concrete were considered in accordance with the new algorithm based on the expansion of creep compliance. The proposed numerical method for long-term deflection control of prestressed concrete bridge girders was verified by comparison with reliable experimental results.
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