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Title |
Flexural Capacity of Precast Concrete Triple Ribs Slab
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Authors |
황승범(Seung-bum Hwang) ; 서수연(Soo-yeon Seo) ; 이강철(Kang-cheol Lee) ; 이석현(Seok-hyun Lee) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2016.28.1.003 |
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Keywords |
하프 PC 슬래브 ; TRS ; 휨실험 ; 실물규격 ; 깊이. 토핑콘크리트 ; 콘크리트 턱 ; 비선형 해석 Half PC slab ; triple ribs slab ; flexural experiment ; full scale ; depth ; topping concrete ; raised spot ; nonlinear sectional analysis |
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Abstract |
The concern about hollow core PC slab has been increased to improve the workability during a construction of building by reducing self weight of structural members. In this manner, recently, TRS (Tripple Ribs Slab) was developed as a new type of half PC slab system. TRS member consists of the triple webs and the bottom flange prestressed by strands. The slab system is completed by casting of topping concrete on the TRS after filling styrofoam between the webs. This paper, presents a flexural experiment to investigate the flexural capacity of the TRS. Five full scale TRS members were made and tested under simple support condition to be failed by flexure and their strength was evaluated by code equations; the variables in the test are the depth and the presence of topping or raised spot formed when slip-forming. In addition, a nonlinear sectional analysis was performed for the specimens and the result was compared with the test results. From the study, it was found that the TRS has enough flexural strength and ductility to resist the design loads and its strength can be suitably predicted by using code equations. The raised spot did not affect the strength so that the spot need not to be removed by doing additional work. For the more accurate prediction of TRS’s flexural behavior by using nonlinear sectional analysis, it is recommended to consider the concrete’s brittle property due to slip-forming process in the modeling.
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