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Title |
Study on Flexural Strength of Wide Composite Beam for Long Span and Saving Story height
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Authors |
최윤철(Yun-Cheul Choi) ; 박금성(Keum-Sung Park) ; 이상섭(Sang-Sup Lee) ; 최현기(Hyun-Ki Choi) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.6.044 |
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Keywords |
합성보 ; 휨강도 ; 공작물 주차장 ; 장스팬 및 층고절감 Composite beam ; Flexural strength ; Parking lot ; Long span & Saving story height |
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Abstract |
Recently, the parking in downtown area has caused severe problem due to the dramatic increase of possessing automobile in the country. A parking structure has been on the spotlight to solve the parking problem in downtown area. However, the overall height of parking structure is stipulated less than 8 m. Therefore, in this research, 'wide composite beam', which is possible for reducing story height and having long span, is developed and the flexural capacity of the wide composite beam is evaluated. Based on the result of the flexural test, the flexural strength of wide composite beam increased by 20% as the thickness of steel beam increased by 3 mm (6 mm → 9 mm) The shapes of rebar (whether it is triangle or rectangular shape) in the wide composite beam did not affect its flexural strength. The flexural strength of wide composite beam without rebar decreased by 10% compared to that of wide composite beam with rebar. In addition, the neutral axis moved upward as a load increased, but the neutral axis moved downward, when the load exceeded a certain level of load.
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