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Title |
Shear 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.2016.28.4.489 |
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Keywords |
Half PC slab ; tripple ribs slab (TRS) shear test ; lattice bar ; shear capacity |
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Abstract |
Recently, a concern about hollow core precast concrete (PC) slab has been increased as a method to improve the construction ability by reducing the self weight of structures during the construction. Hollow core slab which is known as a typical PC slab in domestic construction of PC building has a problem to put shear reinforcements in the web of element during the production of element in the factory. With regard to this point, recently, tripple ribs slab (TRS) which can be said as a new type of half PC slab system was developed. In TRS, it is possible to place shear reinforcements in PC element during the production of the element in the factory. This paper presents the shear test result of TRS which was done by one point loading test under simple support condition. Test parameters are the presence of cast-in-place (CIP) concrete and the contribution of lattice bars. From the test, it was found that the TRS has sufficient shear capacity to resist the design load and its strength can be predicted by the code equations for general beam. It is recommended to ignore the strength of lattice bar in the calculation of shear strength during the construction since its contribution is too low to be considered when CIP is not casted.
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