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Title |
Optimization for the Least Weight, Precast Prestressed Gerber′s U-Beams
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Keywords |
최적설계; 프리캐스트; 프리스트레스트; 자중; U형보; 휨; optimum design; precast; prestressed; self-weight; U-beam; flexure |
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Abstract |
The cost on transmission and erection of the precast prestressed concrete members largely depends on the weight of them. Optimum process is performed on a U-beam section to control the prestressing force, to reduce the self-weight, and to meet the required strength and stability. The strength, deflection, and concrete stress at the top and bottom of the section considered are required to check according to each construction step in this process. The weight of the original rectangular concrete beam could be reduced up to 39∼50％ from this method. Two full scale prototype U-beams were proposed and tested in this study. It was found that the U-beams in the test showed good performance in strength and serviceability within the limits of ultimate strength design method.
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