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Title |
Optimization for Precast Prestressed Wide-U Beams with the Least Depth
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Keywords |
최적화; 프리캐스트; 층고; 지하주차장; 보깊이; U형보; 일방향 슬래브; optimization; precast; story height; underground parking; beam depth; U-type beam; one-way slab |
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Abstract |
The cost of underground work is a dominant factor to determine the total construction fee. It is generally 2~2.5 times higher than that of above ground for building with the same height. 'A new precast prestressed framing plan for underground parking building' was suggested with the beam of the least depth - U-type beams. The depth of regular rectangular reinforced concrete beam which is currently used in the underground parking of apartments could be reduced up to 12~34cm/story due to the development of a U-beams from the optimum process. Two full scale prototype U-beams were tested in this study. It was found that the Wide U-beams in the test showed higher strength than calculated nominal and design, however need to provide temporary supports to meet the flexural moment of construction load at the simply supported state before the lopping concrete hardens.
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